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93f5d40656
The issue was that we sent two different signals to different threads after each other. The DEBUG_SYNC functionality cannot handle this (as the signal is stored in a global variable) and the first one can get lost. Fixed by using the same signal for both threads.
33 lines
915 B
Plaintext
33 lines
915 B
Plaintext
create or replace table t1 (a int primary key, b int, c int, key(b),key(c)) engine=myisam;
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insert into t1 (a) values(1);
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set debug_sync='RESET';
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connect con1, localhost, root,,;
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connect con2, localhost, root,,;
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connection default;
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backup stage start;
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backup stage flush;
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select * from t1;
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a b c
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1 NULL NULL
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set debug_sync='after_purge_tables SIGNAL parked WAIT_FOR go';
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set debug_sync='before_tc_release_table SIGNAL parked2 WAIT_FOR go2';
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backup stage BLOCK_DDL;
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connection con1;
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set debug_sync='now WAIT_FOR parked';
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select * from t1;
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a b c
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1 NULL NULL
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set debug_sync='now SIGNAL go';
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set debug_sync='now WAIT_FOR parked2';
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set debug_sync='before_wait_for_refs SIGNAL waiting WAIT_FOR go2';
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drop table t1;;
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connection con2;
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set debug_sync='now WAIT_FOR waiting';
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set debug_sync='now SIGNAL go2';
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connection default;
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connection con1;
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connection default;
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disconnect con1;
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disconnect con2;
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set debug_sync='RESET';
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