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Bug#33899: Deadlock in mysql_real_query with shared memory connections

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The problem is that the read and write methods of the shared
memory transport (protocol) didn't react to asynchornous close
events, which could lead to a lock up as the client would wait
(until time out) for a server response that will never come.

The solution is to also wait for close events while waiting
for I/O from or to the server.

Bug report and patch submitted by: Armin Schöffmann
This commit is contained in:
Davi Arnaut
2009-03-26 20:25:10 -03:00
parent 9be507ca1f bfa198c2e7
commit 26f561d5d0
3 changed files with 41 additions and 7 deletions
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7
mysql-test/r/shm.result
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@ -2152,4 +2152,11 @@ Warnings:
Warning 1052 Column 'kundentyp' in group statement is ambiguous
drop table t1;
mysqld is alive
SET @max_allowed_packet= @@global.max_allowed_packet;
SET @net_buffer_length= @@global.net_buffer_length;
SET GLOBAL max_allowed_packet= 1024;
SET GLOBAL net_buffer_length= 1024;
ERROR 1153 (08S01) at line 1: Got a packet bigger than 'max_allowed_packet' bytes
SET GLOBAL max_allowed_packet= @max_allowed_packet;
SET GLOBAL net_buffer_length= @net_buffer_length;
End of 5.0 tests.