Locking problem when using timestamp QueryCache eviction policy.
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Key: OPENJPA-1379
URL: https://issues.apache.org/jira/browse/OPENJPA-1379
Project: OpenJPA
Issue Type: Bug
Components: datacache
Affects Versions: 2.0.0-M3, 2.0.0-M4
Reporter: Rick Curtis
Assignee: Rick Curtis
I ran into a bug in AbstractQueryCache when using the timestamp QueryCache
eviction policy. This is only a problem when running in a multithreaded
environment.
The net of the problem is that in
AbstractQueryCache.onTypesChanged(TypesChangedEvent ev) we call writeLock(),
but when using the non-default eviction policy we never call writeUnlock(). As
a result, any other threads requesting a writeLock on the cache will block
indefinitely.
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