Issue :
Sometimes you may see scheduled jobs running twice.
Cause:
This issue may occur in non-clustered environment. There is a Quartz property called org.quartz.jobStore.isClustered which is by default set to TRUE. In theory it shouldn't cause any problems, however due to a Quartz issue it may cause scheduled jobs to run twice.
You can find the details here: http://jira.terracotta.org/jira/browse/QTZ-280
Resolution:
Setting the org.quartz.jobStore.isClustered property in <js-install>/WEB-INF folder to FALSE should resolve the problem in non-clustered environment. In clustered environment the property should be set to TRUE.
Ref. Case #00022638 -- 10:11, 13 March 2012 (UTC)
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