When sending concurrent requests to a statistics enabled sequence, getting "concurrent modification exception" --------------------------------------------------------------------------------------------------------------
Key: SYNAPSE-853 URL: https://issues.apache.org/jira/browse/SYNAPSE-853 Project: Synapse Issue Type: Bug Components: Tracing and Statistics Affects Versions: 2.1 Reporter: Vijayaratha Vijayasingam Priority: Critical Fix For: NIGHTLY When sending concurrent requests(tps~=250) for a statistics enabled sequence, I'm getting "ConcurrentModificationException" [1] @ StatisticsRecord class, Arraylist(which is not thread safe), is used to collect all statistics logs. .. Instead of Arraylist, we can use "CopyOnWriteArrayList" which is thread safe and allows multiple concurrent reads, and for reads to occur concurrently with a write.. I tested with this option and did not notice any considerable performance change.. [1][2012-03-14 22:10:16,398] ERROR - StatisticsReporterThread Error while collecting and reporting mediation statistics 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:88) at org.apache.synapse.aspects.statistics.view.SystemViewStrategy.determineView(SystemViewStrategy.java:61) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@synapse.apache.org For additional commands, e-mail: dev-h...@synapse.apache.org