mydumper -V mydumper 0.5.2, built against MySQL 5.5.34 Running this: mydumper -c Server version: 5.5.29-MariaDB-mariadb1~precise-log mariadb.org binary distribution, wsrep_23.7.3.rXXXX Causes this query to occur and block: | 30 | openquery | localhost | NULL | Query | 770 | checking permissions | CREATE TABLE IF NOT EXISTS mysql.mydumperdummy (a INT) ENGINE=INNODB | 0.00 The mysql error log reports: 140118 9:32:51 [Note] WSREP: Provider paused at 727ac931-ae1d-11e2-0800-35fac11491b4:6506290 And the query is unkillable: kill 30; Show processlist stays at: | 30 | openquery | localhost | NULL | Killed | 959 | checking permissions | CREATE TABLE IF NOT EXISTS mysql.mydumperdummy (a INT) ENGINE=INNODB | 0.00 This process never terminates. The mydumper process terminates correctly: ** (mydumper:3859): CRITICAL **: Unable to list databases: MySQL server has gone away The error log says (I think i got out of the mysql prompt here) 140118 9:48:43 [Warning] Aborted connection 32 to db: 'unconnected' user: 'openquery' host: 'localhost' (Unknown error) 140118 9:48:43 [Warning] Aborted connection 33 to db: 'unconnected' user: 'openquery' host: 'localhost' (Unknown error) 140118 9:48:43 [Warning] Aborted connection 34 to db: 'unconnected' user: 'openquery' host: 'localhost' (Unknown error) 140118 9:48:43 [Warning] Aborted connection 35 to db: 'unconnected' user: 'openquery' host: 'localhost' (Unknown error) The global status is ok now however there is a hanging process: | Variable_name | Value | +----------------------------+-------------------------------------------------+ | wsrep_local_state_uuid | 727ac931-ae1d-11e2-0800-35fac11491b4 | | wsrep_protocol_version | 4 | | wsrep_last_committed | 6506290 | | wsrep_replicated | 1 | | wsrep_replicated_bytes | 456 | | wsrep_received | 10107 | | wsrep_received_bytes | 4364320 | | wsrep_local_commits | 0 | | wsrep_local_cert_failures | 0 | | wsrep_local_bf_aborts | 0 | | wsrep_local_replays | 0 | | wsrep_local_send_queue | 0 | | wsrep_local_send_queue_avg | 0.000000 | | wsrep_local_recv_queue | 29 | | wsrep_local_recv_queue_avg | 1.183673 | | wsrep_flow_control_paused | 0.299376 | | wsrep_flow_control_sent | 1 | | wsrep_flow_control_recv | 1 | | wsrep_cert_deps_distance | 199.864721 | | wsrep_apply_oooe | 0.000000 | | wsrep_apply_oool | 0.000000 | | wsrep_apply_window | 1.000000 | | wsrep_commit_oooe | 0.000000 | | wsrep_commit_oool | 0.000000 | | wsrep_commit_window | 1.000000 | | wsrep_local_state | 4 | | wsrep_local_state_comment | Synced | | wsrep_cert_index_size | 382 | | wsrep_causal_reads | 0 | | wsrep_incoming_addresses | 10.1.2.121:3306,10.1.2.129:3306,10.1.2.120:3306 | | wsrep_cluster_conf_id | 4 | | wsrep_cluster_size | 3 | | wsrep_cluster_state_uuid | 727ac931-ae1d-11e2-0800-35fac11491b4 | | wsrep_cluster_status | Primary | | wsrep_connected | ON | | wsrep_local_index | 1 | | wsrep_provider_name | Galera | | wsrep_provider_vendor | Codership Oy <info@codership.com> | | wsrep_provider_version | 23.2.7-wheezy(r) | | wsrep_ready | ON | I plan on putting a patch back into mydump to remove this "feature" (It looks like a pre-4.1.8 servers workaround that isn't needed. http://bazaar.launchpad.net/~perconardba/mydumper/0.6/revision/23 ) Any clues to why the blocking? -- Daniel Black, Engineer @ Open Query (http://openquery.com) Remote expertise & maintenance for MySQL/MariaDB server environments.