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e2a99f1863
Deadlock happened due to mixed lock order. CREATE/DROP function: wrlock(THR_LOCK_udf) -> lock(LOCK_open) SELECT from view: lock(LOCK_open) -> rdlock(THR_LOCK_udf) Fixed CREATE/DROP function so that LOCK_open does not intersect with wrlock(THR_LOCK_udf). 10.0 is not affected: it doesn't hold LOCK_open while opening view.
40 lines
1.1 KiB
Text
40 lines
1.1 KiB
Text
--source include/have_debug_sync.inc
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--source include/have_udf.inc
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#
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# MDEV-5616 - Deadlock between CREATE/DROP FUNCTION and SELECT from view
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#
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--replace_result $UDF_EXAMPLE_SO UDF_EXAMPLE_LIB
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eval CREATE FUNCTION myfunc_int RETURNS INTEGER SONAME "$UDF_EXAMPLE_SO";
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CREATE VIEW v1 AS SELECT myfunc_int(1);
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connect(con1, localhost, root,,);
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connection con1;
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SET debug_sync='mysql_create_function_after_lock SIGNAL locked WAIT_FOR go';
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--replace_result $UDF_EXAMPLE_SO UDF_EXAMPLE_LIB
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send_eval CREATE FUNCTION myfunc_double RETURNS REAL SONAME "$UDF_EXAMPLE_SO";
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connection default;
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SET debug_sync='now WAIT_FOR locked';
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SET debug_sync='find_udf_before_lock SIGNAL go';
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SELECT * FROM v1;
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FLUSH TABLES;
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connection con1;
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reap;
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SET debug_sync='mysql_drop_function_after_lock SIGNAL locked WAIT_FOR go';
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send DROP FUNCTION myfunc_double;
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connection default;
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SET debug_sync='now WAIT_FOR locked';
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SET debug_sync='find_udf_before_lock SIGNAL go';
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SELECT * FROM v1;
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connection con1;
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reap;
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disconnect con1;
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connection default;
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SET debug_sync='RESET';
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DROP VIEW v1;
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DROP FUNCTION myfunc_int;
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