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Re: [Maria-discuss] Semaphore hangs
by Jon Foster 15 Dec '16

15 Dec '16

On 12/08/2016 04:16 PM, Jon Foster wrote: > On 12/08/2016 03:13 PM, Daniel Black wrote: >> On 09/12/16 09:43, Jon Foster wrote: >>> On 12/07/2016 06:04 PM, Daniel Black wrote: >>>> On 08/12/16 08:51, Jon Foster wrote: >>>>> We are having trouble with MariaDB hanging due to a "semaphore wait". We >>>>> then have to shut MariaDB down as it typically won't recover, unless it >>>>> restarts itself, which happens if we wait long enough. But if its gone >>>>> on long enough MariaDB won't even shutdown, it hangs indefinitely >>>>> waiting for some other internal service. I don't remember the exact name >>>>> and we've been fast enough I haven't seen it in a while. >>>>> >>>>> We've had the database on two completely different servers and still see >>>>> the problem. Both servers were bought new for this project and are a >>>>> year or less old. They are running all SSD drives, Debian 7 64bit with >>>>> MariaDB 10.1 from the MariaDB APT repository. >>>>> >>>>> Since the XtraDB engine was usually mentioned in the logged messages we >>>>> switched back to the Oracle InnoDB engine. Although this seems to have >>>>> reduced the frequency it didn't fix it. >>>>> >>>>> Can anyone give some advice on fixing this. It really seams like a bug >>>>> in MariaDB. I'll try to provide any needed info. >> [...] So its happened again on Tuesday (12/13) morning, early enough the east coasters got it before I was aware of it (they are 3hrs ahead and I was just getting up). Unfortunately I wasn't able to try the "gdb" request from the previous discussion on this topic. So I've been looking for ways to cross reference all the thread and mutexes mentioned to try and pinpoint where the failure is happening. This crash produced over 430MB of log data. I sliced out the first InnoDB monitor dump (a mere 1.5MB) and stripped it down to just the threads and related messages. I'm still reviewing the logs but I found something I thought was interesting enough I'd throw it out here and see if anyone had any thoughts. There were 4,894 threads listed in the dump. But it appears that everyone was waiting for one thread. Here is what the log said about that one thread: 06:01:42 --Thread 139879467059968 has waited at trx0sys.ic line 431 for 0.00 seconds the semaphore: 06:01:42 Mutex at 0x7f3a09a92068 created file trx0sys.cc line 729, lock var 0 06:01:42 Last time reserved by thread 18446744073709551615 in file not yet reserved line 0, waiters flag 0 I trimmed out the data and server name to shorten the lines. Several interesting things to note: 1. Thread 18446744073709551615 doesn't exist in the InnoDB monitor dump. 2. All of the other thread IDs are 15 digits. This one is 20 digits. 3. Over a thousand other threads are waiting on this one because it apparently has the lock_sys->mutex mutex. All of the remaining threads are waiting on those others. 4. This thread shows a 0 second wait time when many of the other threads say they've been waiting over 250 seconds. Sure looks like the mutex is being held by a non-existent thread. Memory corruption? I'm still looking over the logs so I might find some other stuff or something else to point the finger at. But I thought I'd throw this out there and see if anyone has some insight. Or maybe I should be taking this issue to another list or report it as a bug? THX - Jon -- Sent from my Debian Linux workstation -- http://www.debian.org/intro/about Jon Foster JF Possibilities, Inc. jon(a)jfpossibilities.com 541-410-2760 Making computers work for you!

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Re: [Maria-discuss] Semaphore hangs
by Daniel Black 08 Dec '16

08 Dec '16

On 09/12/16 09:43, Jon Foster wrote: > On 12/07/2016 06:04 PM, Daniel Black wrote: >> On 08/12/16 08:51, Jon Foster wrote: >>> We are having trouble with MariaDB hanging due to a "semaphore wait". We >>> then have to shut MariaDB down as it typically won't recover, unless it >>> restarts itself, which happens if we wait long enough. But if its gone >>> on long enough MariaDB won't even shutdown, it hangs indefinitely >>> waiting for some other internal service. I don't remember the exact name >>> and we've been fast enough I haven't seen it in a while. >>> >>> We've had the database on two completely different servers and still see >>> the problem. Both servers were bought new for this project and are a >>> year or less old. They are running all SSD drives, Debian 7 64bit with >>> MariaDB 10.1 from the MariaDB APT repository. >>> >>> Since the XtraDB engine was usually mentioned in the logged messages we >>> switched back to the Oracle InnoDB engine. Although this seems to have >>> reduced the frequency it didn't fix it. >>> >>> Can anyone give some advice on fixing this. It really seams like a bug >>> in MariaDB. I'll try to provide any needed info. Its either a bug or you are running without sufficient hardware. If you rule out the later I suggest opening a report at jira.mariadb.org >>> TIA - Jon >>> >> Needed info: >> * exact MariaDB version 10.1.X >> * mariadb configuration >> * what is the entire mysql log from the startup until the "semaphore >> wait" >> * how are you determining "semaphore wait" >> * is a SHOW FULL PROCESS LIST possible? if so contents? >> * when in a stalled state run on a commmand line (with gdb installed) >> gdb --batch --eval-command="thread apply all bt" program $(pidof mysqld) >> > Version: 10.10.19+maria-1~wheezy, but we started having problems with > 5.5.x which after a few updates prompted us to try 10.1. > > Configuration: > ----------------------- > [mysqld_safe] > socket = /var/run/mysqld/mysqld.sock > nice = -10 Niceing below 0 isn't that productive. -10 might be interfering with kernel IO processes that are needed to enable userspace threads to resume. No high IO/CPU/RAM should be running on the same host however if you do -1 or -2 might help achieve a higher priority than the other process. > [mysqld] > user = mysql > pid-file = /var/run/mysqld/mysqld.pid > socket = /var/run/mysqld/mysqld.sock > port = 3306 > basedir = /usr > datadir = /ssd/mysql > tmpdir = /ssd/tmp > lc_messages_dir = /usr/share/mysql > lc_messages = en_US > skip-external-locking > # NOTE: these two were recently added to troubleshoot > ignore_builtin_innodb > plugin_load=innodb=ha_innodb.so > bind-address = 127.0.0.1 > skip-name-resolve > max_connections = 8000 At the time of the crash you seem to have about 4k threads zgrep 12:35:18 /tmp/mozilla_dan0/mysql-crash-20161207.log.gz | grep ' --Thread' | cut -f 8 -d ' ' | sort -u | wc -l 4158 I suspect you don't have enough grunt in hardware to support this. I do suspect that this level is significantly above standard load. I'd restrict max_connections to something you have seen your hardware handle. > connect_timeout = 5 > wait_timeout = 60 > max_allowed_packet = 1M > thread_cache_size = 100 > sort_buffer_size = 1M > bulk_insert_buffer_size = 16M > tmp_table_size = 32M > max_heap_table_size = 10M > join_buffer_size = 1M > myisam_recover = BACKUP > key_buffer_size = 128M > open-files-limit = 65535 > table_open_cache = 15000 > myisam_sort_buffer_size = 128M > concurrent_insert = 2 > read_buffer_size = 256K > read_rnd_buffer_size = 256K > query_cache_limit = 1M > query_cache_size = 16M > slow_query_log=0 > slow_query_log_file = /var/log/mysql/mariadb-slow.log > long_query_time = 3 > log_slow_verbosity = query_plan > binlog_format = ROW > expire_logs_days = 10 > max_binlog_size = 100M > default_storage_engine = InnoDB > innodb_buffer_pool_size = 2600M > innodb_log_buffer_size = 256M > innodb_file_per_table = 1 > innodb_open_files = 400 > innodb_io_capacity = 400 > innodb_adaptive_hash_index = 0 > # These two were added just prior to this last crash. > innodb_buffer_pool_dump_at_shutdown = 1 > innodb_buffer_pool_load_at_startup = 1 > innodb_flush_log_at_trx_commit = 0 Setting ^ to 0 will mean less IO however it means that you can loose stuff on your expected crash. > innodb_support_xa = 0 > sync_binlog = 0 > ----------------------- > > Logs: This most recent case is about 19M uncompressed. I have hosted it > on my website here: > http://www.jfpossibilities.com/static/pickup/mysql-crash-20161207.log.gz > If you would like it delivered some other way let me know. I have about > 300M of logs from a previous crash situation. That time was particularly > bad since for some reason it would hang again within ten minutes of > being restarted. By limiting the connections on our webservers I was > able to baby it to get it going again. > > I determined "semaphore wait" from the zillions of messages in the logs > that say it. We shut down this one pretty quick. But I usually recognize > the symptoms fairly early on: the number of DB connections escalates > from ~1k up to the max 8k. The number of running queries as shown with > "show processlist" escalates along with it going from less than 10 to > hundreds or thousands depending on how long we wait. sounds like max_connections of 100 might be more suitable. Matches thread_cache_size. > Then too the Apache > connections on the web servers escalate. And of course the "load factor" > on all the servers jumps up. Icinga usually gives us the heads up. Is apache on the same machine? If so you configured Apache so that it doesn't consume more memory and leave MySQL with no headroom. Of course its better to have it on a different host. Make sure Icinga doesn't show swapping. Check your read and write latency on the SSD. > Obviously your last two requests will have to wait until we are having a > problem again. But I have gdb installed and ready to go... I think. I > don't know much about it. SHOW ENGINE INNODB STATUS would be good too. experiment with gdb on a test machine in the same way. Even if its a different process.

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[Maria-discuss] HDF5 and storage engine
by Roberto Spadim 08 Dec '16

08 Dec '16

Hi guys, does anyone know if mariadb/mysql have a storage engine with read access to HDF5 file format? https://support.hdfgroup.org/HDF5/ thanks -- Roberto Spadim SPAEmpresarial - Software ERP Eng. Automação e Controle

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[Maria-discuss] Semaphore hangs
by Jon Foster 08 Dec '16

08 Dec '16

We are having trouble with MariaDB hanging due to a "semaphore wait". We then have to shut MariaDB down as it typically won't recover, unless it restarts itself, which happens if we wait long enough. But if its gone on long enough MariaDB won't even shutdown, it hangs indefinitely waiting for some other internal service. I don't remember the exact name and we've been fast enough I haven't seen it in a while. We've had the database on two completely different servers and still see the problem. Both servers were bought new for this project and are a year or less old. They are running all SSD drives, Debian 7 64bit with MariaDB 10.1 from the MariaDB APT repository. Since the XtraDB engine was usually mentioned in the logged messages we switched back to the Oracle InnoDB engine. Although this seems to have reduced the frequency it didn't fix it. Can anyone give some advice on fixing this. It really seams like a bug in MariaDB. I'll try to provide any needed info. TIA - Jon -- Jon Foster jon(a)jfpossibilities.com

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[Maria-discuss] dead server joins the cluster?
by l vic 05 Dec '16

05 Dec '16

Hello, I see the problem with one of the secondary nodes successfully joining the cluster: the cluster_size=3 and it stays this way but database server in container is dead, e.g. nothing listening on the port 3306 Is there possible scenario for the node with failed database server to join the cluster? Thanks,

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[Maria-discuss] New MariaDB releases and EOL distros
by Ian Gilfillan 01 Dec '16

01 Dec '16

Hi From what I understand, 10.2 is currently not being built on Ubuntu 12.04, as after 10.2.2 it required lots of effort to get it working on the platform, too much for a distro about to reach end of life. Currently, it's still built on Centos5, but I understand that this also isn't ideal. The current deprecation dates are listed at: https://mariadb.com/kb/en/mariadb/deprecation-policy/ What about simplifying these decisions with a guideline, such as that major new releases will not be built on distros that reach end-of-life within, say, 6 months of the expected stable release date. So if a new release is expected to be stable in December (understandably always an estimate), we won't bother to build it on distros that EOL before June. Currently, that would mean not building 10.2 on CentOS 5, which I think would be welcomed.

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[Maria-discuss] rejoin timeout
by l vic 01 Dec '16

01 Dec '16

How long can it take for a node to sync during a rejoin? Is there system variable setting that limit? Thanks, -V

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[Maria-discuss] rejoin timeout?
by l vic 30 Nov '16

30 Nov '16

How long can it take for a node to sync during a rejoin? Is there environmental variable for that? Thanks, -V

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Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION)
by Federico Razzoli 30 Nov '16

30 Nov '16

Woops, sorry, I missed the GLOBAL word :) Federico -------------------------------------------- Mer 30/11/16, Ian Gilfillan <ian(a)mariadb.org> ha scritto: Oggetto: Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION) A: maria-discuss(a)lists.launchpad.net Data: Mercoledì 30 novembre 2016, 15:13 On 30/11/2016 15:13, Federico Razzoli wrote: > This always shows the global value: > SHOW VARIABLES LIKE ... > > This always shows the current session value: > SHOW SESSION VARIABLES LIKE ... This is not correct. SHOW VARIABLES shows the session value: SET GLOBAL wait_timeout=601; SET SESSION wait_timeout=599; SHOW SESSION VARIABLES LIKE 'wait_%'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | wait_timeout | 599 | +---------------+-------+ SHOW GLOBAL VARIABLES LIKE 'wait_%'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | wait_timeout | 601 | +---------------+-------+ SHOW VARIABLES LIKE 'wait_%'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | wait_timeout | 599 | +---------------+-------+ _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss(a)lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp

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Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION)
by Federico Razzoli 30 Nov '16

30 Nov '16

This always shows the global value: SHOW VARIABLES LIKE ... This always shows the current session value: SHOW SESSION VARIABLES LIKE ... Global value is read from the files when the server starts, and later can be changed with SET GLOBAL var = val. Session value is copied from global value when the session starts (so changing the global value doesn't affect existing sessions) and can later be changed with SET var = val. In other words, the global value is important because it is used by all new sessions by default, but the session value is what really takes effect. I beleive that your application sets a session value. Federico -------------------------------------------- Mer 30/11/16, Florent B <florent(a)coppint.com> ha scritto: Oggetto: Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION) A: "Federico Razzoli" <federico_raz(a)yahoo.it>, maria-discuss(a)lists.launchpad.net Data: Mercoledì 30 novembre 2016, 10:44 Ok, I found the problem thanks to you Federico. On Debian, mysql-common package provided by MariaDB repository contains "wait_timeout = 600" in my.cnf. This is not the default value specified in documentation (28800). And when I use "mysql -u root -p -h my_host" command to show variables, the default value is displayed (28800), I never saw 600 in here ! Why ? But displaying variables in my PHP app showed me that wait_timeout was effectively set to 600. Setting wait_timeout=28800 in a config file in /etc/mysql/conf.d directory fixes this. Should we consider "wait_timeout = 600" in my.cnf as a bug ? That's not default value... On 11/29/2016 11:17 PM, Federico Razzoli wrote: > Interesting. A couple ideas: > > 1 > Try this query: > SHOW SESSION VARIABLES LIKE '%timeout%'; > But this time, this should be executed by PHP, using the same library used by the application. Why? To check if a library changes a timeout at session level. > > 2 > Have you checked if your application reconnects N times? For example, 600 could be a 60 seconds timeout * 10 attempts. > > Federico > > > -------------------------------------------- > Mar 29/11/16, Florent B <florent(a)coppint.com> ha scritto: > > Oggetto: Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION) > A: "Reindl Harald" <h.reindl(a)thelounge.net>, maria-discuss(a)lists.launchpad.net > Data: Martedì 29 novembre 2016, 12:22 > > On 11/29/2016 12:03 PM, > Reindl Harald wrote: > > > > > > Am 29.11.2016 um > 11:49 schrieb Florent B: > >> For > example, if I try this in PHP: > >> > >> 1/ Connect to mariadb > >> > >> 2/ sleep 610 > seconds > >> > >> 3/ > ping mariadb > >> > >> => I got Server has gone away > error. > >> > >> > With a 590 sleep time, no error. > >> > >> I use MariaDB 10.1, didn't change > any "timeout" value in MariaDB : > >> interactive_timeout & wait_timeout > are 28800 > > > > http://php.net/manual/en/mysqlnd.config.php#ini.mysqlnd.net-read-timeout > > > > Hi, and > thank you. But I cannot find any timeout of 600 > seconds... > default_socket_timeout = 60 > mysqlnd.net_read_timeout = 31536000 > > And I have the exactly same > problem using this algorithm in Python, it's > not related to PHP... > > _______________________________________________ > Mailing list: https://launchpad.net/~maria-discuss > Post to : maria-discuss(a)lists.launchpad.net > Unsubscribe : https://launchpad.net/~maria-discuss > More help : https://help.launchpad.net/ListHelp > > > _______________________________________________ > Mailing list: https://launchpad.net/~maria-discuss > Post to : maria-discuss(a)lists.launchpad.net > Unsubscribe : https://launchpad.net/~maria-discuss > More help : https://help.launchpad.net/ListHelp

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Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION)
by Federico Razzoli 29 Nov '16

29 Nov '16

Interesting. A couple ideas: 1 Try this query: SHOW SESSION VARIABLES LIKE '%timeout%'; But this time, this should be executed by PHP, using the same library used by the application. Why? To check if a library changes a timeout at session level. 2 Have you checked if your application reconnects N times? For example, 600 could be a 60 seconds timeout * 10 attempts. Federico -------------------------------------------- Mar 29/11/16, Florent B <florent(a)coppint.com> ha scritto: Oggetto: Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION) A: "Reindl Harald" <h.reindl(a)thelounge.net>, maria-discuss(a)lists.launchpad.net Data: Martedì 29 novembre 2016, 12:22 On 11/29/2016 12:03 PM, Reindl Harald wrote: > > > Am 29.11.2016 um 11:49 schrieb Florent B: >> For example, if I try this in PHP: >> >> 1/ Connect to mariadb >> >> 2/ sleep 610 seconds >> >> 3/ ping mariadb >> >> => I got Server has gone away error. >> >> With a 590 sleep time, no error. >> >> I use MariaDB 10.1, didn't change any "timeout" value in MariaDB : >> interactive_timeout & wait_timeout are 28800 > > http://php.net/manual/en/mysqlnd.config.php#ini.mysqlnd.net-read-timeout > Hi, and thank you. But I cannot find any timeout of 600 seconds... default_socket_timeout = 60 mysqlnd.net_read_timeout = 31536000 And I have the exactly same problem using this algorithm in Python, it's not related to PHP... _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss(a)lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp

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Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION)
by Reindl Harald 29 Nov '16

29 Nov '16

Am 29.11.2016 um 12:22 schrieb Florent B: > On 11/29/2016 12:03 PM, Reindl Harald wrote: >> Am 29.11.2016 um 11:49 schrieb Florent B: >>> For example, if I try this in PHP: >>> >>> 1/ Connect to mariadb >>> 2/ sleep 610 seconds >>> 3/ ping mariadb >>> => I got Server has gone away error. >>> With a 590 sleep time, no error. >>> I use MariaDB 10.1, didn't change any "timeout" value in MariaDB : >>> interactive_timeout & wait_timeout are 28800 >> >> http://php.net/manual/en/mysqlnd.config.php#ini.mysqlnd.net-read-timeout > > Hi, and thank you. But I cannot find any timeout of 600 seconds... > default_socket_timeout = 60 > mysqlnd.net_read_timeout = 31536000 > > And I have the exactly same problem using this algorithm in Python, it's > not related to PHP... then pretty sure you mysqld timeouts are not what you think, otherwise we would see the same issues on our dbmail machines when after hours of idle postfix tries to re-use it's connections (and we did have such events when that values where too low) so why don't you ask the server instead pretend they are not lowered? MariaDB [(none)]> show variables like 'wait_timeout'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | wait_timeout | 300 | +---------------+-------+ 1 row in set (0.00 sec) MariaDB [(none)]> show variables like 'wait_timeout'; +---------------+--------+ | Variable_name | Value | +---------------+--------+ | wait_timeout | 604800 | +---------------+--------+ 1 row in set (0.00 sec) wait_timeout = 604800 interactive_timeout = 604800

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Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION)
by Stephane VAROQUI 29 Nov '16

29 Nov '16

Stéphane Varoqui, Senior Consultant Phone: +33 695-926-401, skype: svaroqui http://www.mariadb.com <http://www.mariadb.com/> > Le 29 Nov 2016 à 12:22, Florent B <florent(a)coppint.com> a écrit : > > On 11/29/2016 12:03 PM, Reindl Harald wrote: >> >> >> Am 29.11.2016 um 11:49 schrieb Florent B: >>> For example, if I try this in PHP: >>> >>> 1/ Connect to mariadb >>> >>> 2/ sleep 610 seconds >>> >>> 3/ ping mariadb >>> >>> => I got Server has gone away error. >>> >>> With a 590 sleep time, no error. >>> >>> I use MariaDB 10.1, didn't change any "timeout" value in MariaDB : >>> interactive_timeout & wait_timeout are 28800 >> >> http://php.net/manual/en/mysqlnd.config.php#ini.mysqlnd.net-read-timeout >> > > Hi, and thank you. But I cannot find any timeout of 600 seconds... > default_socket_timeout = 60 > mysqlnd.net_read_timeout = 31536000 > > And I have the exactly same problem using this algorithm in Python, it's > not related to PHP… > Have you check your TCP settings or may be some firewall or proxy that would just sit in the middle ? > _______________________________________________ > Mailing list: https://launchpad.net/~maria-discuss > Post to : maria-discuss(a)lists.launchpad.net > Unsubscribe : https://launchpad.net/~maria-discuss > More help : https://help.launchpad.net/ListHelp

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Re: [Maria-discuss] Aborted connection (CLOSE_CONNECTION)
by Reindl Harald 29 Nov '16

29 Nov '16

Am 29.11.2016 um 11:49 schrieb Florent B: > For example, if I try this in PHP: > > 1/ Connect to mariadb > > 2/ sleep 610 seconds > > 3/ ping mariadb > > => I got Server has gone away error. > > With a 590 sleep time, no error. > > I use MariaDB 10.1, didn't change any "timeout" value in MariaDB : > interactive_timeout & wait_timeout are 28800 http://php.net/manual/en/mysqlnd.config.php#ini.mysqlnd.net-read-timeout

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[Maria-discuss] semi-sync replication issue
by Rhys.Campbell＠swisscom.com 28 Nov '16

28 Nov '16

Hello All, I recently upgraded to MariaDB 10.0.28 and I am having sporadic issues with semi-sync replicating timeouts. Lots of these are logged.... [ERROR] Read semi-sync reply network error: (errno: 1159) [ERROR] Semi-sync master failed on net_flush() before waiting for slave reply Is anyone else experiencing this? Cheers, Rhys

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[Maria-discuss] jdbc failure after restart
by l vic 23 Nov '16

23 Nov '16

i have the following jdbc exception in my jdbc client for the node 1 after another node (node2) is removed: om.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: WSREP has not yet prepared node for application use at sun.reflect.GeneratedConstructorAccessor9.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:404) at com.mysql.jdbc.Util.getInstance(Util.java:387) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:917) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2526) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2673) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2503) at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1369) at com.mysql.jdbc.ConnectionImpl.loadServerVariables(ConnectionImpl.java:3833) at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3283) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2297) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) at sun.reflect.GeneratedConstructorAccessor5.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.jdbc.Util.handleNewInstance(Util.java:404) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:664) I wonder why i have this failure when i just trying to read db from the unaffected node? The failure seems to be permanent, once it happened - all subsequent reads fail

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Re: [Maria-discuss] master and slave binlog question?
by Pavel Ivanov 18 Nov '16

18 Nov '16

I guess you can do it like that, yes. I wonder what do you need it for though. On Thu, Nov 17, 2016 at 9:45 PM, Ljr Yang <dbmsprog(a)gmail.com> wrote: > Thank you. > > innobackup backup info on slave: > #cat xtrabackup_binlog_info > mysql-bin.000003 83882214 0-118-60061898358 > > Only filter GTID 0-118-60061898358 in all binlog file of slave ? > > mysqlbinlog -vv mysqbin.000001 | grep -B5 "0-118-60061898358" > mysqlbinlog -vv mysqbin.000002 | grep -B5 "0-118-60061898358" > ........ > > 2016-11-18 13:24 GMT+08:00 Pavel Ivanov <pivanof(a)google.com>: >> >> There is no way to find corresponding binlog file and position on the >> slave. You should use GTIDs to find corresponding binlog positions. >> >> On Thu, Nov 17, 2016 at 7:19 PM, Ljr Yang <dbmsprog(a)gmail.com> wrote: >> > >> > Hi, >> > we config master slave and set log_slave_updates = 1 on slave. >> > on master server‘s binlog file and pos , example: mysql-bin.000005 >> > 2036891 , >> > how could quick find corresponding binlog file and pos on slave? >> > Thanks. >> > >> > -- >> > Ljr >> > >> > _______________________________________________ >> > Mailing list: https://launchpad.net/~maria-discuss >> > Post to : maria-discuss(a)lists.launchpad.net >> > Unsubscribe : https://launchpad.net/~maria-discuss >> > More help : https://help.launchpad.net/ListHelp >> > > > > > > -- > Ljr

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[Maria-discuss] master and slave binlog question?
by Ljr Yang 18 Nov '16

18 Nov '16

Hi, we config master slave and set log_slave_updates = 1 on slave. on master server‘s binlog file and pos , example: mysql-bin.000005 2036891 , how could quick find corresponding binlog file and pos on slave? Thanks. -- Ljr

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[Maria-discuss] Download speeds on archive.mariadb.org
by Guillaume Lefranc 14 Nov '16

14 Nov '16

Hi everyone, Download speeds on archive.mariadb.org have reached an abysmal level - 6kb/s today. Honestly, what is the foundation waiting for to solve this issue that has been lasting for years? I am ready to donate server space and bandwidth myself if needed.

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[Maria-discuss] galera replication specs?
by l vic 14 Nov '16

14 Nov '16

Is there online docs to describe Galera in detail, such as specs/RFC? Thanks,

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[Maria-discuss] rsync failure?
by l vic 08 Nov '16

08 Nov '16

Have the rsync failure (see the trace below): 2016-11-08 15:17:34 139959897945856 [ERROR] WSREP: Failed to read 'ready <addr>' from: wsrep_sst_rsync --role 'joiner' --address 'node3.frame.mesos' --datadir '/var/lib/mysql/' --parent '114' '' Read: '(null)' 2016-11-08 15:17:34 139959897945856 [ERROR] WSREP: Process completed with error: wsrep_sst_rsync --role 'joiner' --address 'node3.frame.mesos' --datadir '/var/lib/mysql/' --parent '114' '' : 1 (Operation not permitted) 2016-11-08 15:17:34 139960239241984 [ERROR] WSREP: Failed to prepare for 'rsync' SST. Unrecoverable. 2016-11-08 15:17:34 139960239241984 [ERROR] Aborting Can someone with better understanding of replication process explain the nature of this problem? Can it be caused by hostname resolution failure, or would it be storage related? Thank you,

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[Maria-discuss] rsync timeout?
by l vic 08 Nov '16

08 Nov '16

Is it possible to increase rsync timeout? I checked http://galeracluster.com/documentation-webpages/galeraparameters.html but couldn't find corresponding parameters... Thanks, -V

2 2

[Maria-discuss] on stored procedures
by Federico Razzoli 08 Nov '16

08 Nov '16

Some good points from Bill Karwin: https://www.quora.com/What-are-the-reasons-not-to-use-or-not-use-stored-pro… Federico

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Re: [Maria-discuss] on stored procedures
by Federico Razzoli 08 Nov '16

08 Nov '16

Hi Sergei! I was wondering the same! Justin's explanation is probably correct, but I think that various discussions in this list proven that a part of the community badly wants this feature. I wrote a unit tester in SQL some time ago (I know it may sound weird, but I needed it to test several things, from procedures to query time, and even metrics). It was insanely hard. I mean - I think I can write a unit tester in JavaScript or PHP or even BASH in a few hours, with all the features I want. But SQL is full of traps, so it took weeks (of course it was not my only task). Some of the features that have been discussed in this list could have been implemented as stored procedures. For example, extensions to KILL. It may not be the perfect solution but, well, it is not reasonable to expect that you implement every single need/idea I have during my work. If I could write general purpose stored procedures in any decent language, I would do it, and then would push them to GitHub. It seems that some people agree on this but... still nothing happens. Even PL/SQL parser seems to have higher priority than external languages! :( Is there anything we can do to convince the team? Bye, Federico -------------------------------------------- Lun 7/11/16, Sergei Golubchik <serg(a)mariadb.org> ha scritto: Oggetto: Re: [Maria-discuss] on stored procedures A: "Justin Swanhart" <greenlion(a)gmail.com> Cc: "Federico Razzoli" <federico_raz(a)yahoo.it>, "Maria Discuss" <maria-discuss(a)lists.launchpad.net> Data: Lunedì 7 novembre 2016, 22:42 Hi, Justin! On Nov 07, Justin Swanhart wrote: > We discussed it here and it seemed vary popular. WL-820. I know, right? A cool and useful feature, I'd say. I cannot understand why it's constantly being pushed down for the last 10 years. I still hope we get it someday. > On Mon, Nov 7, 2016 at 10:43 AM, Sergei Golubchik <serg(a)mariadb.org> wrote: > > Hi, Federico! > > > > On Nov 07, Federico Razzoli wrote: > > > Some good points from Bill Karwin: > > > https://www.quora.com/What-are-the-reasons-not-to-use-or- > > not-use-stored-procedures/answer/Bill-Karwin > > > > Thanks. > > > > These are valid points, and some of them are related. > > For example, "does not have a rich library of functions or standard > > procedures" that follows from "does not support packages". > > Which might be fixed in https://jira.mariadb.org/browse/MDEV-10591 > > > > External languages for stored procedures - that's a very cool feature, > > and patches exist for many years. But, apparently, it's more cool than > > practically useful? There were almost no requests for it, not when I was > > in MySQL, not in MariaDB. And, frankly, I do not know why, this looks > > insanely useful to me. Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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[Maria-discuss] MariaDB 10.1.19 and other releases now available
by Daniel Bartholomew 07 Nov '16

07 Nov '16

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.1.19, MariaDB Galera Cluster 10.0.28, and MariaDB Connector/ODBC 2.0.13. These are all stable (GA) releases. See the Release Notes and Changelogs for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 10.1.19 - Release Notes: https://mariadb.com/kb/en/mdb-10119-rn/ - Changelog: https://mariadb.com/kb/en/mdb-10119-cl/ - Downloads: https://downloads.mariadb.org/mariadb/10.1.19 About MariaDB 10.1: - https://mariadb.com/kb/en/what-is-mariadb-101/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ MariaDB Galera Cluster 10.0.28 - Release Notes: https://mariadb.com/kb/en/mgc-10028-rn/ - Changelog: https://mariadb.com/kb/en/mgc-10028-cl/ - Downloads: https://downloads.mariadb.org/mariadb-galera/10.0.28 About MariaDB Galera Cluster: - https://mariadb.com/kb/en/what-is-mariadb-galera-cluster/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ MariaDB Connector/ODBC 2.0.13 - Release Notes: https://mariadb.com/kb/en/mco-2013-rn/ - Changelog: https://mariadb.com/kb/en/mco-2013-cl/ - Downloads: https://downloads.mariadb.org/connector-odbc/2.0.13 About MariaDB Connector/ODBC: - https://mariadb.com/kb/en/about-mariadb-connector-odbc/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/donate/ We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadbfdn - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] Community Involvement - GSoC Mentor Summit impressions
by Vicențiu Ciorbaru 07 Nov '16

07 Nov '16

Hi everyone! Since MariaDB has completed another Google Summer of Code program this year, with some great projects as well, the MariaDB Foundation was able to send 2 mentors to the summit in California this year. I was one of the people that had the privilege to go. There were a lot of talks there about community involvement and how to encourage people to contribute. I've picked the ideas that I've found to be most interesting and useful and have blogged [1] about them. I intend to try and apply some of them if possible. Since this is a community matter (albeit more GSoC related), it makes sense to ask for feedback from the community. I think some of the ideas are at least partly implemented but we can always do better. If you're interested, lets have a discussion on this. Vicențiu [1] http://vicentiu.ciorbaru.io/community-involvement-gsoc-mentor-summit-impres…

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[Maria-discuss] GRANT PROXY access denied with proxied User
by Fabian Jucker 04 Nov '16

04 Nov '16

Hi, At our enterprise we have a DBA-User proxied with "GRANT PROXY ON 'dba'@'%' TO ''@'%'" and backed by pam module (roughly according to [1]) to login from our ldap-accounts. When logging in via pam into the DBA-Role I'm unable to grant the proxy privileges to other users. Following [2] (MySQL docs, because the MariaDB docs are lacking any further information about this) I already tried to "GRANT PROXY ON 'dba'@'%' TO ''@'%' WITH GRANT OPTION" and "GRANT PROXY ON ''@'' TO 'dba'@'%' WITH GRANT OPTION" (as [2] is ambiguous about if the "proxied_user" or the "proxy_user" should have the "WITH GRANT OPTION"), but neither the first grant nor the second one showed any effect. When I grant the proxy privilege with grant option to a local user, this user is able to grant the proxy privileges to other users. So my question is, if it's not possible to grant proxy privileges while one's logged in with a proxy user? Thanks in advance, Fabian References: [1]: https://mariadb.com/blog/configuring-pam-authentication-and-user-mapping-ma… [2]: https://dev.mysql.com/doc/refman/5.5/en/proxy-users.html

1 1

[Maria-discuss] MYSQL_OPT_CONNECT_TIMEOUT default?
by Peter Laursen 03 Nov '16

03 Nov '16

MySQL docs page http://dev.mysql.com/doc/refman/5.7/en/mysql-options.html *MYSQL_OPT_CONNECT_TIMEOUT (argument type: unsigned int *)* *The connect timeout in seconds.* However I don't find it documented anywhere what the default (client-initiated) connect_timeout will become if not specified in mysql_options(). Or will the client never initiate a timeout in connection phase in such case? We are usng MariaDB C-conn 2.31 so the question here on this list is specifically for MariaDB connector. I didn't find it documented here either. But both MySql and MariaDB have probably inherited this from the old LGPL 3.x connector so this are probably the same in both. Asked a docs request here as well: http://bugs.mysql.com/bug.php?id=83600 --- Peter

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[Maria-discuss] MariaDB 10.1.18 server audit question?
by Ljr Yang 02 Nov '16

02 Nov '16

HI, all We use MariaDB 10.1.18 and CentOS 6.7, today, try to use server audit log. after execute SET GLOBAL server_audit_events = "query_ddl,query_dml,query_dcl" and SET GLOBAL server_audit_logging = 1 ; find have not filter "select" statement in audit log 20161102 11:08:52,fm-test-118,root,172.28.10.121,908933,2799737,QUERY,test,'select * from anv01 LIMIT 0, 100',0 -- Ljr

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[Maria-discuss] upgrading galera 10.0 -> 10.1 without writes downtime
by Federico Razzoli 02 Nov '16

02 Nov '16

Hello list I have to upgrade a cluster and I hoped I can do it safely without a downtime. In my understanding though it is not possible. In my specific case, the cluster is 10.0 and must be upgraded to 10.1. There is a "master" node. Steps are: 1. I upgrade all "slave" nodes 2. I change the "master" 3. I upgrade the old master The problem is that, between 2 and 3, old master is 10.0, and it replicates from 10.1. This is not supported, based on this page: https://mariadb.com/kb/en/mariadb/upgrading-mariadb-upgrading-from-mariadb-… "to prevent 10.1 propagating to 10.0, which is not supported" So my question is, is there a way to upgrade this cluster without writes downtime? Regards, Federico

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[Maria-discuss] Flashback (MDEV-10459) bikeshedding a name
by Daniel Black 02 Nov '16

02 Nov '16

During the MariaDB Developers Meetup last month we deferred deciding on a name for Flashback - a rewinding of database state using binary logs applied in reverse. It is described in MDEV-10459 (https://jira.mariadb.org/browse/MDEV-10459) If you have an opinion as to what name to choose follow the link below to start the survey. Thank you for your participation! The survey closes at the end of this month. https://www.surveymonkey.com/r/T8JVPR3 Results so far: https://www.surveymonkey.com/results/SM-DPMRQV9N

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[Maria-discuss] Replication compatibility MySQL/MariaDB
by Daniel Black 02 Nov '16

02 Nov '16

Folks, At the MariaDB Developer meetup there was some discussion about the limits of compatibility especially regarding replication. I've started a section on this page: https://mariadb.com/kb/en/mariadb/mariadb-vs-mysql-compatibility/ If you can identify what can/cannot work in various replication modes between MySQL and MariaDB please document it on this page. If you cannot edit this for some reason reply to the MariaDB Discuss list and eventually the results can be correlated and the page can be updated. As usual other material changes to improving the KB documentation is welcome. Daniel

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[Maria-discuss] node join failure?
by l vic 01 Nov '16

01 Nov '16

I see intermittent failure for some nodes to join cluster (see below): 2016-11-01 17:24:22 140050125105920 [Warning] WSREP: Failed to prepare for incremental state transfer: Local state UUID (00000000-0000-0000-0000-000000000000) does not match group state UUID (fdb9a4a3-a056-11e6-a01d-5a15e8d77e80): 1 (Operation not permitted) at galera/src/replicator_str.cpp:prepare_for_IST():482. IST will be unavailable. 2016-11-01 17:24:22 140049819625216 [Note] WSREP: Member 1.0 () requested state transfer from '*any*'. Selected 0.0 ()(SYNCED) as donor. 2016-11-01 17:24:22 140049819625216 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 4) 2016-11-01 17:24:22 140050125105920 [Note] WSREP: Requesting state transfer: success, donor: 0 2016-11-01 17:24:24 140049819625216 [Warning] WSREP: 0.0 (): State transfer to 1.0 () failed: -255 (Unknown error 255) 2016-11-01 17:24:24 140049819625216 [ERROR] WSREP: gcs/src/gcs_group.cpp:gcs_group_handle_join_msg():733: Will never receive state. Need to abort. Any idea what the cause can be and how to deal with it? Thank you,

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[Maria-discuss] Upcoming conferences for talking about MariaDB Server
by Colin Charles 31 Oct '16

31 Oct '16

Hi All, FOSDEM is Feb 4-5 2017 in Brussels and the CfP for the MySQL & friends devroom ends December 6 2016 - please submit MariaDB Server related talks (see: http://www.mysqlandfriends.eu/post/fosdem-2017s-mysql-friends-devroom-call-…) Percona Live Santa Clara is April 24-27 2017 and the CfP for this large event is November 13 2016 - please submit your MariaDB Server related talks! (see: https://www.percona.com/live/17/) Good luck in getting a talk in! cheers, -c -- Colin Charles, http://bytebot.net/blog/ twitter: @bytebot | skype: colincharles "First they ignore you, then they laugh at you, then they fight you, then you win." -- Mohandas Gandhi

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[Maria-discuss] Galera backup failing with error “mysqldump: Error 1213: Deadlock found when trying to get lock; try restarting transaction when dumping table”
by Lukas Lehner 31 Oct '16

31 Oct '16

Hi please help http://dba.stackexchange.com/questions/153263/galera-backup-failing-with-er… Lukas

1 0

[Maria-discuss] Problem with Master/Slave <=> Master/Slave <=> Master/Slave Replication
by LinuXperia 29 Oct '16

29 Oct '16

Hi All! I am having a Problem with getting mariadb works flawless using a Master/Slave[1] <=> Master/Slave[2] <=> Master/Slave[3] The First Time i was able to insert a row on the Master[1] Server and the data was reproduced/replicated to all servers. At this Time i thinked everything is fine now. But then when i tryed to deleted the new Created Row on Master[1] the Data was only deleted on the Master[1] Server while the others Servers [2] and [3] still had the data! I expected that the deleted row should be also deleted on all master/slave servers but it did not! How can i solve this Problem? And what is actually the Problem with MySQL/MariaDB? I am getting the impression that MariaDB is really bad when it comes to Replication/Sync of Data in a Distributed Architecture. As a Example let say on server has to reboot because of a Cloud maintenance. From what i see this MaraiDB server will be forever corrupted after the restart and never sync again as first it has to manually be adjusted to the master bin log position and second it has also be told to work as a slave after this. Not really what i would expect from a autonomous replicating Master Slave Data Base Server after a restart! Hope somebody can tell me how to resolve all this Sync Problems so finally MariaDB Master/Slave Database Server work flawless without to worry that sooner or later a node or a few of them will get useless and corrupted! Thanks in advance for any helpful Tip and Answer! A example of my my.cnf Master/Slave[2] Server changes! server-id = 2 replicate-same-server-id = 0 auto-increment-increment = 8 auto-increment-offset = 1 log_bin = /var/log/mysql/mariadb-bin log_bin_index = /var/log/mysql/mariadb-bin.index # not fab for performance, but safer sync_binlog = 1 expire_logs_days = 10 max_binlog_size = 100M binlog_do_db = logedin_users binlog-format = ROW # slaves relay_log = /var/log/mysql/relay-bin relay_log_index = /var/log/mysql/relay-bin.index relay_log_info_file = /var/log/mysql/relay-bin.info log_slave_updates = 1 #read_only binlog-checksum = 1 master_verify_checksum = 1 relay_log_recovery = 1 slave_compressed_protocol = 1 slave_sql_verify_checksum = 1 sync_master_info = 1 sync_relay_log = 1 sync_relay_log_info = 1

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[Maria-discuss] MariaDB 10.0.28 now available
by Daniel Bartholomew 28 Oct '16

28 Oct '16

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.0.28. This is a stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 10.0.28 - Release Notes: https://mariadb.com/kb/en/mdb-10028-rn/ - Changelog: https://mariadb.com/kb/en/mdb-10028-cl/ - Downloads: https://downloads.mariadb.org/mariadb/10.0.28 About MariaDB 10.0: - https://mariadb.com/kb/en/what-is-mariadb-100/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/donate/ We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadbfdn - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

1 0

[Maria-discuss] Error Restoring mysqldump in MariaDB 5.5
by Jamie Jackson 28 Oct '16

28 Oct '16

I'm getting an error restoring a mysqldump. At first, I was restoring the full dump (with data), but fortunately, I'm able to elicit the same error, on the same line. Please let me know if this is user error, or whether I should file a ticket. *Dump:* $ mysqldump -h myhost -umyuser -p --no-data --routines --single-transaction mysite_cms > /vagrant/temp/downloads/misc/prod_skeleton.sql $ mysql -uroot -p mysite_raw_redacted < /vagrant/temp/downloads/misc/prod_skeleton_redacted.sql ERROR 1064 (42000) at line 1451: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '*/' at line 1 That line is highlighted: DELIMITER ;; /*!50003 CREATE*/ /*!50017 DEFINER=`mysite_cms`@`%`*/ /*!50003 TRIGGER cal_tbl_event_delete AFTER DELETE ON cal_tbl_event FOR EACH ROW INSERT INTO delete_log(deleted_id, deleted_date, deleted_table) VALUES (Old.id, now(), 'cal_tbl_event'); */;; DELIMITER ; *Source DB:* +-------------------------+---------------------+ | Variable_name | Value | +-------------------------+---------------------+ | innodb_version | 5.5.49-MariaDB-38.0 | | protocol_version | 10 | | slave_type_conversions | | | version | 5.5.52-MariaDB | | version_comment | MariaDB Server | | version_compile_machine | x86_64 | | version_compile_os | Linux | +-------------------------+---------------------+ *Target DB:* +-------------------------+---------------------------------+ | Variable_name | Value | +-------------------------+---------------------------------+ | innodb_version | 5.5.52-MariaDB-38.3 | | protocol_version | 10 | | slave_type_conversions | | | version | 5.5.53-MariaDB-1~precise | | version_comment | mariadb.org binary distribution | | version_compile_machine | x86_64 | | version_compile_os | debian-linux-gnu | +-------------------------+---------------------------------+ Thanks, Jamie

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[Maria-discuss] Minor version upgrades across a cluster
by Craig Bailey 27 Oct '16

27 Oct '16

Hi, We have a three node MariaDB Galera cluster on version 10.1.14 an we would like to upgrade to 10.1.18. Our approach to this was to offline a node upgrade it and then add it back to the cluster and allow it to do an IST to catch up (rinse and repeat for other two nodes). However this would mean that we will have a period of time where nodes in the cluster will be on different minor versions, is this safe, or will it possibly cause some kind of data corruption or crash? Regards Evertz UK cbailey(a)evertz.com<mailto:cbailey@evertz.com> www.evertz.com This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender (as shown above). Kindly do not reproduce, print or forward any material received in error, please delete it immediately. Evertz UK Limited (Company No. 3458137) is incorporated in England and Wales and has its registered office at 100 Berkshire Place, Wharfedale Road, Winnersh, Wokingham, Berkshire, United Kingdom, RG41 5RD. Evertz Singapore Pte Limited (Company No. 200817005N) is incorporated in Singapore and has its registered office at One Marina Boulevard, #28-00. Singapore 018989.

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[Maria-discuss] User feedback plugin - reporting broken?
by Colin Charles 26 Oct '16

26 Oct '16

Hi, See https://mariadb.org/feedback_plugin/stats/server_count_by_month/ Is the reporting broken? August to September has a huge drop in reporting servers. Thanks -- Colin Charles, http://bytebot.net/blog/ twitter: @bytebot | skype: colincharles "First they ignore you, then they laugh at you, then they fight you, then you win." -- Mohandas Gandhi

2 1

[Maria-discuss] .Net + Entity Framework
by Karthick Subramanian 26 Oct '16

26 Oct '16

All, Currently we are using below: .Net framework 4 Entity Framework ODP .Net to Oracle DB New environment: .Net framework 4 Entity Framework MariaDB 10.1.16 We would like to know on how can we connect MariaDB for the above said framework .Net + Entity Framework. We are trying to find some sources online but couldn't figure it out. Can anyone share me on how can we establish connection between .Net Entity Framework to MariaDb and what connector we need to use and any sample code on how we connect. Your help will be highly appreciated. Regards, Karthick

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[Maria-discuss] wsrep-node-name vs. wsrep-node-address?
by l vic 25 Oct '16

25 Oct '16

Do I need to use "--wsrep-node-name" option with dns names to identify the node in Galera cluster instead of "wsrep-node-address", or is the "--wsrep-node-address=<dns-name>" supposed to work? Thanks,

2 1

[Maria-discuss] workaround for MDEV-9688
by Lukas Lehner 25 Oct '16

25 Oct '16

Hi https://jira.mariadb.org/browse/MDEV-9688 is there a workaround for this issue? We need it for DBaaS Lukas

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[Maria-discuss] MariaDB and TLB misses / Large Pages
by J. Cassidy 21 Oct '16

21 Oct '16

Hello all, is there a reliable cookbook / checklist to implement Large Tables on a SuSE SLES 12 SP1 Linux distribution? I find there there is a lot of old/inaccurate/dodgy information on my search machine travels. The test setup is as follows- Everything enabled for Large Pages as per various online Fora. 128GB RAM 72GB InnoDB buffer size, eight instances. MariaDB is DB is defined in a 52GB RAM disk. (This is a test to tie down TLB and Lx cache misses and high CPU next activity) Any pointers/hints most welcome. Regards, JC John Cassidy Obere Bühlstrasse 21 8700 Küsnacht (ZH) Switzerland / Suisse / Schweiz Mobile: +49 152 58961601 (Germany) Mobile: +352 621 577 149 (Luxembourg) Mobile: +41 78 769 17 97 (CH) Landline: +41 44 509 1957 Mobile email: mobile(a)jdcassidy.eu http://www.jdcassidy.eu "Aut viam inveniam aut faciam" - Hannibal.

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[Maria-discuss] MariaDB Knowledge base - 500 error
by Karthick Subramanian 21 Oct '16

21 Oct '16

Did anyone facing this 500 error while accessing the Maria DB Knowledge Base. Thank you. Don't know to whom we need to report this, so sending to this mail ID. Sorry if it cause any inconvenient for others. When we click the Support in MariaDb website, getting below error: Database Error: *There seems to be a problem connecting to the database server specified in your configuration file. Please contact your local system administrator for further assistance. *

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[Maria-discuss] wsrep problem with dns names
by l vic 20 Oct '16

20 Oct '16

I am trying to use dns hostnames vs. ip addresses in mariadb container configuration: --wsrep-cluster-address=gcomm://node1.cluster1.mesos,node2.cluster1.mesos.. --wsrep_node_address=node1.cluster1.mesos --wsrep-new-cluster .. but i see galera error: WSREP: Failed to resolve tcp://node1.cluster1.mesos The address "node1.cluster1.mesos" i can ping 64 bytes from node-x (10.10.30.1): icmp_seq=1 ttl=64 time=0.023 ms Would it be possible to configure Galera to use dns names? Thanks, -V

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[Maria-discuss] eviction in information_schema?
by l vic 19 Oct '16

19 Oct '16

How can i detect eviction of node from the cluster from "information_schema" other than decreasing of WSREP_CLUSTER_SIZE? Thanks,

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Re: [Maria-discuss] MariaDB Server 10.3 notes
by Federico Razzoli 17 Oct '16

17 Oct '16

You made a question and also provided the answer. If you really need to run a storage engine optimized for a specific use case on an operating system that is not good for MySQL, use Docker :) Federico -------------------------------------------- Lun 17/10/16, Richard Bensley <richardbensley(a)gmail.com> ha scritto: Oggetto: Re: [Maria-discuss] MariaDB Server 10.3 notes A: "Rich Prohaska" <prohaska7(a)gmail.com> Cc: "Maria Discuss" <maria-discuss(a)lists.launchpad.net> Data: Lunedì 17 ottobre 2016, 17:10 With hyper-v becoming free, the arrival of the Linux subsystem, and docker for windows 10; there isn't much of an excuse to proclaim you are unable to use the Linux binaries. The Redis and Postgres devs are already rejoicing. -----Segue allegato----- _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss(a)lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp

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[Maria-discuss] MariaDB 5.5.53 and Connector/J 1.5.4 now available
by Daniel Bartholomew 17 Oct '16

17 Oct '16

The MariaDB project is pleased to announce the immediate availability of MariaDB 5.5.53 and MariaDB Connector/J 1.5.4. Both are Stable (GA) releases. See the Release Notes and Changelogs for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 5.5.53 Stable (GA) - Release Notes: https://mariadb.com/kb/en/mdb-5553-rn/ - Changelog: https://mariadb.com/kb/en/mdb-5553-cl/ - Downloads: https://downloads.mariadb.org/mariadb/5.5.53 About MariaDB 5.5: - https://mariadb.com/kb/en/what-is-mariadb-55/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ MariaDB Connector/J 1.5.4 Stable (GA) - Release Notes: https://mariadb.com/kb/en/mcj-154-rn/ - Changelog: https://mariadb.com/kb/en/mcj-154-cl/ - Downloads: https://downloads.mariadb.org/connector-java/1.5.4/ About MariaDB Connector/J: - https://mariadb.com/kb/en/about-mariadb-connector-j/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/donate/ We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] MariaDB Server 10.3 notes
by Colin Charles 17 Oct '16

17 Oct '16

Hi, Sorry this is a little later than expected (who couldn’t resist walking around Amsterdam on that late beautiful Saturday afternoon?)! This session was led by Rasmus whom while employed by MariaDB Corporation, was also the MariaDB Foundation Board member leading it. This was the last session on the formal schedule before lunch (more was added to it as well later on) I notice he’s also blogged [part 1](https://mariadb.org/thoughts-mariadb-server-10-3-mariadb-developers-meet…, and maybe these notes help for part 2 (or maybe they don’t). Scroll down for what is still coming in MariaDB Server 10.2 of course (post-GA even)! # MariaDB Server 10.3 * MDEV-10177 * MDEV-371 * MDEV-7773 - create aggregate functions in SQL * User defined types (pluggable data type API) * CJK language support - MDEV-10267, MDEV-10268 * SPIDER storage engine - MDEV-7698 * Further MyRocks development (10.2 will have it as experimental; MariaDB Corporation is looking to hire a dedicated engineer to work on MyRocks) * InnoDB: InnoDB native partitioning - so MySQL 8 InnoDB? But Monty says there's next to no changes in InnoDB 8... Instant add column. New InnoDB deadlock detection (8.0). New INFORMATION_SCHEMA table (8.0). Dedicated tablespace for temporary tables (in 5.7 and merged, check). Lock wait policy (contribution) * Pluggable parser - MDEV-10142, PL/SQL parser, Oracle syntax support, INTERSECT, EXCLUDE * Sequences (like PostgreSQL implementation) * more for window functions (user defined window functions, MDEV-10855) * more for CTEs (CTE sharing isn't in now, and MySQL 8 has it, so needs to be done; Writable CTEs) * replace yaSSL with GnuTLS (SChannel in Windows) * "always encrypt" on the client side - Booking says there is no particular interest in this at the moment. * socket authentication * X Protocol/Document store - only if people have time or money will it be done * Peter asks if there is any plans to support other languages like V8? Supporting legacy database like Oracle PL/SQL is nice, but what about JavaScript and stuff? Eric mentions his old work on Perl and Java external language stored procedures. Peter says, if JSON and JavaScript are your lingua franca, PL/SQL isn't so interesting - but there was no interest in this amongst the folk. * No slave left behind patch - MDEV-8112 (Booking wants a bit more than the current patch, some extensions) - maybe in 10.2 * Compressed binary log (from Tencent) * For ALTER TABLE show the corresponding CREATE TABLE statement as a comment in the binary log. This is an annotation. * Counters for unsafe statements in replication (maybe in 10.2) * Extended table map in RBR is missing * Galera 4, encryption of gcache * Fix the XA transaction bug ( MySQL has fixed it already ) - MDEV-7974 * Indexes on expressions (this is part of virtual columns, will it not go into 10.2? Check with Serg) * Flashback DDL MDEV-10571 (flashback DML will come in 10.2). It only works with row based replication. Talk about what to name it. There's already a MySQL time machine on github. Many like the name Rewind (but not Monty). Let's do a poll on the mailing list * Additional GIS functions to stay compatible. Also it would be good to have a standalone GIS library (Georg suggests; wlad isn't too happy with the suggestion). Georg suggests that calculations should use the reference systems (Unflatten the world - MariaDB Server GIS the world looks flat) * Optimizer trace - MDEV-6111 * Query rewriting - MDEV-5561 * Replace libmysqlclient with Connector/C - MDEV-9055 - embedded/replication/ storage engine (connect, spider, federatedX) - work continues from 10.2 * Invisible indexes from MySQL 8 - this is something Eric wants to see * With MyRocks coming, should we drop TokuDB (and maybe even deprecate in 10.2?) - bugs that MariaDB Corporation reports to Percona don't seem to get fixed. Peter says that bugs are fixed for customers... and there is ongoing development to make it better * ORDER BY LIMIT optimizer bugs (MDEV-8306) # Still in MariaDB Server 10.2 * Flashback DML - MDEV-10570 * Time delayed replication - MDEV-7145 * MyRocks (10.2.4 - maturity experimental) * GeoJSON (in 10.2 after beta) and ST_Geohash * sha256_password plugin (after GA) - MDEV-9804 - Serg will do it in a MySQL compatible way * sys schema (after GA) * Server system default values MDEV-7635 * MySQL deprecated `DES_ENCRYPT`, `DES_DECRYPT` - Monty says he knows a high level customer using it, a bank. * Column compression from Tencent? -- Colin Charles, http://bytebot.net/blog/ twitter: @bytebot | skype: colincharles "First they ignore you, then they laugh at you, then they fight you, then you win." -- Mohandas Gandhi

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