DefaultDatabaseLocker broken on MySQL 4.1
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Key: AMQ-1313
URL: https://issues.apache.org/activemq/browse/AMQ-1313
Project: ActiveMQ
Issue Type: Bug
Components: Message Store
Affects Versions: 4.1.1
Reporter: Kenny MacLeod
Priority: Critical
AMQ-992 introduced a change in 4.1.1 where the DefaultDatabaseLocker issued a
LOCK TABLE command instead of a SELECT FOR UPDATE.
This may work with MySQL 5 ( I haven't had the chance to test that yet), but it
certainly doesn't work with MySQL 4.1. The "LOCK TABLE" statement does not
return a result set in 4.1, so the execute() method returns false, and the
locking loop never terminates.
Given that AMQ-992 was unnecessary (see comments there for the reason why), I
suggest that the change is rolled back to using SELECT FOR UPDATE.
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