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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HTTPCORE-31) ConcurrentModificationException thrown by DefaultConnectingIOReactor.processTimeouts() when 2 worker threads are used
Date Thu, 25 Jan 2007 11:39:49 GMT

    [ https://issues.apache.org/jira/browse/HTTPCORE-31?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12467334

Oleg Kalnichevski commented on HTTPCORE-31:


I am pretty sure the fix for HTTPCORE-28 is in the SVN trunk (see rev 499577 [1]). I have
not updated the snapshots in the maven2 repository primarily to not break Synapse code, as
there have been some minor API changes. I wanted to hold this off until I manage to get better
coverage for the client side code. Please let me know if you want me to go ahead and publish
newest snapshots?


[1] http://svn.apache.org/viewvc?view=rev&revision=499577

> ConcurrentModificationException thrown by DefaultConnectingIOReactor.processTimeouts()
when 2 worker threads are used
> ---------------------------------------------------------------------------------------------------------------------
>                 Key: HTTPCORE-31
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-31
>             Project: HttpComponents Core
>          Issue Type: Bug
>          Components: HttpCore NIO
>    Affects Versions: 4.0-alpha4
>            Reporter: Asankha C. Perera
>         Assigned To: Oleg Kalnichevski
> I am seeing a ConcurrentModificationException thrown by DefaultConnectingIOReactor.processTimeouts()
when a load test is being performed. The Javadocs for the Selector.keys() states that the
returned Set is not directly modifiable, but a key is removed only after it has been cancelled
and its channel deregistered. I have started the DefaultConnectingIOReactor with two worker
> Exception in thread "HttpCoreNIOSender" java.util.ConcurrentModificationException
>        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841)
>        at java.util.HashMap$KeyIterator.next(HashMap.java:877)
>        at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
>        at org.apache.http.nio.impl.reactor.DefaultConnectingIOReactor.processTimeouts(DefaultConnectingIOReactor.java:151)
>        at org.apache.http.nio.impl.reactor.DefaultConnectingIOReactor.execute(DefaultConnectingIOReactor.java:92)
>        at org.apache.axis2.transport.nhttp.HttpCoreNIOSender.executeClientEngine(HttpCoreNIOSender.java:103)
>        at org.apache.axis2.transport.nhttp.HttpCoreNIOSender.access$000(HttpCoreNIOSender.java:57)
>        at org.apache.axis2.transport.nhttp.HttpCoreNIOSender$1.run(HttpCoreNIOSender.java:80)
>        at java.lang.Thread.run(Thread.java:595)

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