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e7362d457a
This one was when the code releases and reaquires the lock with pthread_cond_wait() - and semisync is switched off meanwhile.
37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
--source include/have_semisync_plugin.inc
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--source include/not_embedded.inc
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--source include/have_debug_sync.inc
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--source include/have_binlog_format_mixed_or_statement.inc
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--source include/master-slave.inc
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# MDEV-359: There was a server crash when the code first checks if semisync
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# is enabled without lock, then if so takes the lock and tests again.
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# If semisync was disabled in-between the first and the second test, an
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# assert was incorrectly made that referenced a NULL pointer.
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#
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# This tests uses debug_sync to pause one thread at the critical point in
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# the code, disable the semisync, and then continue the paused thread.
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CREATE TABLE t1 (a INT) ENGINE=MyISAM;
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INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master';
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SET GLOBAL rpl_semi_sync_master_enabled = ON;
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--connection master1
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SET DEBUG_SYNC = "rpl_semisync_master_commit_trx_before_lock SIGNAL m1_ready WAIT_FOR m1_cont";
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--send
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INSERT INTO t1 SELECT * FROM t1;
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--connection master
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SET DEBUG_SYNC= "now WAIT_FOR m1_ready";
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SET GLOBAL rpl_semi_sync_master_enabled = OFF;
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SET DEBUG_SYNC= "now SIGNAL m1_cont";
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--connection master1
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--reap
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connection master;
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DROP TABLE t1;
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disable_warnings;
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UNINSTALL PLUGIN rpl_semi_sync_master;
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enable_warnings;
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--source include/rpl_end.inc
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