Endless (busy) loop in
org.continuent.sequoia.controller.cache.result.ResultCache.flushCache()
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Key: SEQUOIA-991
URL: https://forge.continuent.org/jira/browse/SEQUOIA-991
Project: Sequoia
Type: Bug
Components: Core
Versions: Sequoia 2.10.9
Environment: 2 hosts; RHEL 4; Sun Java 1.5.0 update 13; 2 Sequoia Controllers
(one on each host), each controlling a single PostgreSQL 8.2 backend; single
virtual database; JBoss / Hibernate clients
Reporter: Michal Ruzicka
Priority: Critical
The controller loops indefinitely in the
org.continuent.sequoia.controller.cache.result.ResultCache.flushCache() at
lines 856-860:
856: while (!queries.isEmpty())
857: {
858: Iterator iter = queries.values().iterator();
859: ((AbstractResultCacheEntry) iter.next()).invalidate();
860: }
The queries HasMap contains only entries which doesn't belong to any cache
(their cache fields are null). The invalidate() call is then helpless as it can
only remove an entry from a cache if the entry has its cache reference set.
This bug seems to tied with "Unable to remove pending query" warning(s) like
this:
15:01:44,499 WARN sequoia.controller.cache Unable to remove pending query
postgres,select id from OutgoingEmail where id =? for update/<!%L|1730515|!%>
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