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Knielsen mdev41658 galera mark start commit - #6138
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…illed A parallel-replication worker would assert in ha_rollback_trans() because wsrep_after_statement() and ha_commit_trans()'s wsrep error path could roll back its transaction before retry_event_group() unmarks it as committing. Skip mark_start_commit() when using Galera. Galera certification can cause rollback of parallel replication transactions during commit when there is a conflicting transaction outside of replication. This can cause to start the next GCO too early, while the previous GCO still needs to rollback and retry. Do not fail replication with an error when wsrep_after_statement() fails due to a retryable error like brute-force kill. Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
rpt_handle_event() now calls wsrep_after_statement() unconditionally, so the provider handle and commit-order slot are released even when apply_event_and_update_pos_for_parallel() already failed. Its own failure maps through wsrep_override_error()/wsrep_current_error(), covering every wsrep::client_error code instead of only e_deadlock_error and e_interrupted_error, so has_temporary_error() can recognise any resulting retryable error. Log severity for the genuinely unexpected failure case reverts to WSREP_WARN. The duplicated mark_start_commit() guard in retry_event_group() and handle_rpl_parallel_thread() is factored into one mark_start_commit_unless_wsrep() helper. galera_parallel_slave_rollback.cnf drops the redundant binlog-format=row, already set by the included galera_2nodes_as_slave.cnf. Assisted-by: Claude:claude-4.6-sonnet
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