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Michael Semb Wever commented on CASSANDRA-16210:
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I think you were right originally about this patch not applying to 4.0. The
call hierarchy to the private {{Schema.dropKeyspace(..)}} method is only three
only methods, all of which are {{synchronized}}.
In 3.11: at runtime it's only accessed by method in
{{SchemaKeyspace.mergeSchema(..)}} which is also {{synchronized}}. But the
method itself is public and not {{synchronized}} so the tests can get into the
race condition. Ideally i would think it's better to have synchronized at the
test layer, but that's maybe asking a bit much for such a small fix, so I'm +1
on the 3.11 patch.
> Synchronize Keyspace instance store/clear
> -----------------------------------------
>
> Key: CASSANDRA-16210
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16210
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Schema
> Reporter: Ekaterina Dimitrova
> Assignee: Ekaterina Dimitrova
> Priority: Normal
> Fix For: 3.11.x, 4.0-beta3
>
>
> DTest failure:
> dtest-large.repair_tests.repair_test.TestRepairDataSystemTable.test_repair_table
> (vnodes) - one random failure was reported which pointed to a race condition
> to be spotted.
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