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https://issues.apache.org/jira/browse/HTTPCORE-31?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCORE-31.
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Resolution: Fixed
Fix Version/s: 4.0-alpha4
Asankha,
I am reasonably sure HTTPCORE-28 fixed the problem. There have also been a
number of other fixes and improvements in HttpCore NIO. I am going to update
the snapshots in the coming days and submit a patch for Synapse to fix any API
breakage.
Oleg
> 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
> Fix For: 4.0-alpha4
>
>
> 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 nodes
> 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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