[Maria-developers] Plugin 'PBXT' will be forced to shutdown (was Re: Test failures in PBXT after merging with MySQL-5.1.41)

Hi Kristian, I have seen this warning occasionally with other versions of MySQL. Since it also happens with MyISAM and sometimes other engines, I had not given it much thought before. However, it would be good to track down exactly where this reference is being held. To repeat the error, do I just create an empty file called kn.test, and run: mysql-test-run.pl --suite=pbxt pbxt.kn Thanks, Paul On Nov 24, 2009, at 1:21 PM, Kristian Nielsen wrote:

Kristian Nielsen writes:

...

PS. I now get this in the mysqld.err log after server shutdown in PBXT test suite:

091124 13:09:45 [Warning] Plugin 'MyISAM' will be forced to shutdown 091124 13:09:45 [Warning] Plugin 'PBXT' will be forced to shutdown

Ok, some more details:

I can repeat this by running an empty test case (mysql-test/suite/pbxt/t/kn.test):

------------------------------ cut here ------------------------------ --skip "Test shutdown problem with skipped test" ------------------------------ cut here ------------------------------

(cd mysql-test && perl mysql-test-run.pl --suite=pbxt pbxt.kn)

I get this in the mysqld.1.err:

CURRENT_TEST: pbxt.kn 091124 15:11:00 [Note] Plugin 'InnoDB' is disabled. 091124 15:11:00 [Note] PrimeBase XT (PBXT) Engine 1.0.08d RC loaded... 091124 15:11:00 [Note] Paul McCullagh, PrimeBase Technologies GmbH, http://www.primebase.org 091124 15:11:00 [Note] Event Scheduler: Loaded 0 events 091124 15:11:00 [Note] /home/knielsen/devel/maria/my/merge-5.1.41/ sql/mysqld: ready for connections. Version: '5.1.41-mariadb-beta-valgrind-max-debug-log' socket: '/ home/knielsen/devel/maria/my/merge-5.1.41/mysql-test/var/tmp/mysqld. 1.sock' port: 13000 Source distribution 091124 15:11:00 [Note] Got signal 15 to shutdown mysqld 091124 15:11:00 [Note] /home/knielsen/devel/maria/my/merge-5.1.41/ sql/mysqld: Normal shutdown

091124 15:11:00 [Note] Event Scheduler: Purging the queue. 0 events 091124 15:11:00 [Warning] Plugin 'MyISAM' will be forced to shutdown 091124 15:11:00 [Warning] Plugin 'PBXT' will be forced to shutdown 091124 15:11:00 [Note] PrimeBase XT Engine shutdown... 091124 15:11:00 [Note] Debug sync points hit: 50 091124 15:11:00 [Note] Debug sync points executed: 0 091124 15:11:00 [Note] Debug sync points max active per thread: 0 091124 15:11:00 [Note] /home/knielsen/devel/maria/my/merge-5.1.41/ sql/mysqld: Shutdown complete

This is from this tree on Launchpad containing the merge with MySQL 5.1.41:

lp:~maria-captains/maria/5.1-merge

The problem is that the ref_count of PBXT is 2 at shutdown time.

Maybe this is another problem with the way that PBXT has to do init in a separate thread, I see you already had to solve some other possibly related problems. Any ideas? It may be that this is something introduced in the merge with MySQL 5.1.41, not 100% sure though as this particular warning was not detected before in our Buildbot tests...

- Kristian.

-- Paul McCullagh PrimeBase Technologies www.primebase.org www.blobstreaming.org pbxt.blogspot.com