ConcurrentModificationException thrown by
DefaultConnectingIOReactor.processTimeouts() when 2 worker threads are used
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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
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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