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XA COMMIT/ROLLBACK of XA transaction owned by different thread may access freed memory if that thread disconnects at the same time. Also concurrent XA COMMIT/ROLLBACK of recovered XA transaction were not serialized properly.
47 lines
1.0 KiB
Plaintext
47 lines
1.0 KiB
Plaintext
--source include/have_debug_sync.inc
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--echo #
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--echo # MDEV-7793 - Race condition between XA COMMIT/ROLLBACK and disconnect
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--echo #
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--echo # Note that this test is meaningful only with valgrind.
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let $op= XA COMMIT 'xatest';
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let $i= 2;
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while ($i)
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{
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connect con1, localhost, root;
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connect con2, localhost, root;
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connection con1;
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XA START 'xatest';
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XA END 'xatest';
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XA PREPARE 'xatest';
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connection con2;
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SET debug_sync='xa_after_search SIGNAL parked WAIT_FOR go';
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send_eval $op;
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connection default;
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SET debug_sync='now WAIT_FOR parked';
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disconnect con1;
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disable_query_log;
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echo # Waiting for thread to get deleted;
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while (`SELECT VARIABLE_VALUE!=2 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME='max_used_connections'`)
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{
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real_sleep 0.1;
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FLUSH STATUS;
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}
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enable_query_log;
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SET debug_sync='now SIGNAL go';
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connection con2;
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--error ER_XAER_NOTA
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reap;
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disconnect con2;
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connection default;
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SET debug_sync='RESET';
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let $op= XA ROLLBACK 'xatest';
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dec $i;
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}
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