Commits on Nov 22, 2024

1. MDEV-35465 Async replication stops working on Galera async replica no… …

   …de when parallel replication is enabled
   
   Parallel slave failed to retry in retry_event_group() with error
   
       WSREP: Parallel slave worker failed at wsrep_before_command() hook
   
   Fix wsrep transaction cleanup/restart in retry_event_group() to properly
   clean up previous transaction by calling wsrep_after_statement().
   Also move call to reset error after call to wsrep_after_statement()
   to make sure that it remains effective.
   
   Add a MTR test galera_as_slave_parallel_retry to reproduce the error
   when the fix is not present.
   
   Other issues which were detected when testing with sysbench:
   
   Check if parallel slave is killed for retry before waiting for prior
   commits in THD::wsrep_parallel_slave_wait_for_prior_commit(). This
   is required with slave-parallel-mode=optimistic to avoid deadlock
   when a slave later in commit order manages to reach prepare phase
   before a lock conflict is detected.
   
   Suppress wsrep applier specific warning for slave threads.

   

   temeo committed Nov 22, 2024
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