When using java nio I get this exception. It does not happen on Sun jvm with
exactly the same code so it might be due do synchronization problems in
AbstractSelectableChannel.java. In the code of this class, it seems the
LinkedList can be modified by addSelectionKey and removeSelectionKey without
locking on blockingLock(), I don't know if it is the problem.
java.util.ConcurrentModificationException
at java.util.LinkedList$LinkedListItr.checkMod(LinkedList.java:800)
at java.util.LinkedList$LinkedListItr.next(LinkedList.java:852)
at
java.nio.channels.spi.AbstractSelectableChannel.locate(AbstractSelect
ableChannel.java:203)
at
java.nio.channels.spi.AbstractSelectableChannel.register(AbstractSele
ctableChannel.java:242)
at
org.apache.mina.transport.socket.nio.SocketIoProcessor.doAddNew(Socke
tIoProcessor.java:166)
at
org.apache.mina.transport.socket.nio.SocketIoProcessor.access$2(Socke
tIoProcessor.java:143)
at
org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(Soc
ketIoProcessor.java:554)
at
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:43)
at java.lang.Thread.run(Thread.java:741)
at java.lang.VMThread.run(VMThread.java:53)
at java.lang.VMThread$1.Invoke(VMThread.java:303)
at cli.System.Threading.ThreadHelper.ThreadStart_Context(Unknown
Source)
at cli.System.Threading.ExecutionContext.Run(Unknown Source)
at cli.System.Threading.ThreadHelper.ThreadStart(Unknown Source)
It appears also sometimes as this exception:
java.lang.NullPointerException
at java.util.LinkedList$LinkedListItr.<init>(LinkedList.java:787)
at java.util.LinkedList.listIterator(LinkedList.java:640)
at java.util.AbstractList.listIterator(AbstractList.java:407)
at
java.nio.channels.spi.AbstractSelectableChannel.locate(AbstractSelectableChannel.java:199)
at
java.nio.channels.spi.AbstractSelectableChannel.register(AbstractSelectableChannel.java:242)
at
org.apache.mina.transport.socket.nio.SocketIoProcessor.doAddNew(SocketIoProcessor.java:166)
at
org.apache.mina.transport.socket.nio.SocketIoProcessor.access$2(SocketIoProcessor.java:143)
at
org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(SocketIoProcessor.java:554)
at
org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:43)
at java.lang.Thread.run(Thread.java:741)
at java.lang.VMThread.run(VMThread.java:53)
at java.lang.VMThread$1.Invoke(VMThread.java:303)
at cli.System.Threading.ThreadHelper.ThreadStart_Context(Unknown
Source)
at cli.System.Threading.ExecutionContext.Run(Unknown Source)
at cli.System.Threading.ThreadHelper.ThreadStart(Unknown Source)
Thanks
--
Summary: ConcurrentModificationException using
java.nio.channels.spi.AbstractSelectableChannel
Product: classpath
Version: 0.93
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: classpath
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: cyprien dot noel at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30892
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