[ https://issues.apache.org/jira/browse/SYNAPSE-853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vijayaratha Vijayasingam updated SYNAPSE-853: --------------------------------------------- Attachment: statisticsReport.patch attaching the patch, please review and commit > 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 > > Attachments: statisticsReport.patch > > > 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