[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3769) Enabling jmx statistics cause OOM
Josh Moore (JIRA)
noreply at atlassian.com
Fri Mar 25 11:14:08 EDT 2011
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=41857#action_41857 ]
Josh Moore commented on HHH-3769:
---------------------------------
Still present in 3.5.6. Primarily an issue when queries are generated by users via string formatting. Since our server provides the HQL interface directly to users, a relatively small number of calls (I did it with 20K calls of 10K bytes) brought down the server.
> Enabling jmx statistics cause OOM
> ---------------------------------
>
> Key: HHH-3769
> URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3769
> Project: Hibernate Core
> Issue Type: Bug
> Affects Versions: 3.2.0.ga
> Reporter: Sid
>
> It looks like when org.hibernate.jmx.StatisticsService.statisticsEnabled=true all query strings get logged to org.hibernate.stat.StatisticsImpl.queryStatistics.
> There is a clear method in org.hibernate.stat.StatisticsImpl that reset all statistics but i don't see this method being called other than when some one calls org.hibernate.jmx.StatisticsService.clear()
> As queryStatistics is a HasMap this will causes OOM.
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