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https://issues.apache.org/jira/browse/SYNAPSE-661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877053#action_12877053
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Hiranya Jayathilaka commented on SYNAPSE-661:
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How about using a ConcurrentLinkedQueue instead of ArrayList?
> ConcurrentModifucationException at StatisticsRecord
> ---------------------------------------------------
>
> Key: SYNAPSE-661
> URL: https://issues.apache.org/jira/browse/SYNAPSE-661
> Project: Synapse
> Issue Type: Bug
> Affects Versions: 1.2
> Reporter: Hiranya Jayathilaka
> Assignee: indika priyantha kumara
> Fix For: 2.0
>
>
> When running load tests (concurrency level > 15) with statistics enabled,
> every now and then, I get the following exception:
> Exception in thread "Thread-20" java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at
> org.apache.synapse.aspects.statistics.StatisticsRecord.getAllLogIds(StatisticsRecord.java:90)
> at
> org.apache.synapse.aspects.statistics.view.SystemViewStrategy.determineView(SystemViewStrategy.java:61)
> Here I also have some custom code which tries to get the latest stats from
> Synapse periodically. When the custom code tries to access a
> StatisticsRecord, if it also gets updated, the above error is thrown. I think
> we should use a more thread safe data structure in the StatisticsRecord
> class, instead of an ArrayList.
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