Type:
Priority:
Resolution:
Fixed
Affects Version/s:
5.5(EOL) , (16) 10.1(EOL) , 10.2(EOL) , 10.3(EOL) , 10.4(EOL) , 10.5 , 10.6 , 10.7(EOL) , 10.8(EOL) , 10.9(EOL) , 10.10(EOL) , 10.11 , 11.0(EOL) , 11.1(EOL) , 11.2(EOL) , 11.3(EOL) , 11.4
The test for MDEV-6619 observed on the mandatory MemorySanitizer staging builder , but I have seen it in my local environment as well):
main.kill_processlist-6619 w55 [ fail ]
Test ended at 2024-01-22 06:48:05
CURRENT_TEST: main.kill_processlist-6619
--- /home/buildbot/amd64-debian-11-msan/build/mysql-test/main/kill_processlist-6619.result 2024-01-22 06:34:52.000000000 +0000
+++ /home/buildbot/amd64-debian-11-msan/build/mysql-test/main/kill_processlist-6619.reject 2024-01-22 06:48:04.671491118 +0000
@@ -1,7 +1,7 @@
connect con1,localhost,root,,;
SHOW PROCESSLIST;
Id User Host db Command Time State Info Progress
-# root # test Sleep # # NULL 0.000
+# root # test Query # # select count(*) = 0 from information_schema.session_variables where variable_name = 'debug_sync' and 0.000
# root # test Query # # SHOW PROCESSLIST 0.000
SET DEBUG_SYNC='before_execute_sql_command SIGNAL ready WAIT_FOR go';
SHOW PROCESSLIST;
As far as I can tell, this is a race condition. I failed to reproduce this by running the last few tests that had been executed on the same server instance before the failure:
./mtr --no-reorder main.keywords main.kill main.kill_processlist-6619
is caused by
MDEV-6619
SHOW PROCESSLIST returns empty result set after KILL QUERY
Closed
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Bug
Major
I have a fix for this, so taking it (hope that's ok).