[MDEV-20561] Galera node shutdown fails in non-Primary Created: 2019-09-11  Updated: 2019-09-15  Resolved: 2019-09-13

Status: Closed
Project: MariaDB Server
Component/s: Galera
Affects Version/s: 10.2.26, 10.3.17, 10.4.7
Fix Version/s: 10.2.28, 10.3.19, 10.4.9

Type: Bug Priority: Major
Reporter: Teemu Ollakka Assignee: Jan Lindström (Inactive)
Resolution: Fixed Votes: 0
Labels: None


 Description   

Galera node refuses to shut down when in non-Primary. Reproducible with the following MTR test:

--source include/galera_cluster.inc
--source include/have_innodb.inc
 
--let $node_1 = node_1
--let $node_2 = node_2
--source include/auto_increment_offset_save.inc
 
--connection node_1
# Set higher weight for node_1 to keep it in primary
# while node_2 is isolated.
SET GLOBAL wsrep_provider_options = 'pc.weight=2';
 
--connection node_2
# Isolate node_2 from the group and wait until wsrep_ready becomes OFF.
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 1';
SET SESSION wsrep_sync_wait = 0;
--let $wait_condition = SELECT VARIABLE_VALUE = 'OFF' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_ready'
--source include/wait_condition.inc
 
# Verify that graceful shutdown succeeds.
--source include/shutdown_mysqld.inc
--source include/start_mysqld.inc
 
--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
--source include/wait_condition.inc
 
--connection node_1
--source include/wait_condition.inc
 
# Restore original settings.
SET GLOBAL wsrep_provider_options = 'pc.weight = 1';
--source include/auto_increment_offset_restore.inc

The test fails with

CURRENT_TEST: galera.galera_shutdown_nonprim
mysqltest: In included file "/home/teemu/work/git/mariadb-server/mysql-test/suite/galera/include/shutdown_mysqld.inc": 
included from /home/teemu/work/git/mariadb-server/mysql-test/suite/galera/t/galera_shutdown_nonprim.test at line 26:
At line 16: mysql_shutdown failed


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