[MDEV-23509] Shutdown of a cluster node hangs (seems to be waiting for Applier threads to die) Created: 2020-08-18  Updated: 2021-12-23  Resolved: 2021-12-23

Status: Closed
Project: MariaDB Server
Component/s: wsrep
Affects Version/s: 10.4.14
Fix Version/s: 10.4.22

Type: Bug Priority: Minor
Reporter: Kent Hoover Assignee: Jan Lindström (Inactive)
Resolution: Fixed Votes: 0
Labels: None
Environment:

CentOS 6

Attachments: Text File mysql-error.log    

 Description   

My situation looks very similar to this Percona issue, resolved 2019: https://jira.percona.com/browse/PXC-2127 .

I have a 3-node cluster, stop a node gracefully:

  • mysqld and mysqld_safe do not die.
  • mysql.pid remains
  • mysql-error.log shows shutdown is in progress, lots of Applier threads are killed.
  • grastate.dat looks OK, bootstrap: 0, reasonable seqno.
  • login attempts fail
  • kill -TERM <mysql_pid> doesn't have any effect
  • kill -9 <mysql_pid> does !
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