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https://issues.apache.org/jira/browse/HTTPCORE-206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758722#action_12758722
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Oleg Kalnichevski commented on HTTPCORE-206:
--------------------------------------------
Very bizarre. The NPE is thrown because there was no HTTP connection object
associated with the I/O session at the time when IOEventDispatch#inputReady()
event was called. I cannot think of a valid execution path that could lead to
such a condition.
Oleg
> NPE in DefaultClientIOEventDispatch
> -----------------------------------
>
> Key: HTTPCORE-206
> URL: https://issues.apache.org/jira/browse/HTTPCORE-206
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.1-alpha1
> Environment: CentOS 5.2, x86-32, Sun JVM 1.5.0, Synapse 1.2, HttpCore
> 4.1-alpha1
> Reporter: Ralph Henze
> Assignee: Asankha C. Perera
> Fix For: 4.1
>
>
> When used inside Synapse 1.2, after outgoing http requests, a problem occurs
> that shows a NPE with the following stack trace.
> The NPE occurs as infinite loop (that may have its origin in Synapse).
> 2009-09-23 13:18:25,466 WARN
> [org.apache.synapse.transport.nhttp.HttpCoreNIOSender] System may be
> unstable: IOReactor encountered a runtime exception : null
> java.lang.NullPointerException
> at
> org.apache.http.impl.nio.DefaultClientIOEventDispatch.inputReady(DefaultClientIOEventDispatch.java:148)
> at
> org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:161)
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:339)
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:319)
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:275)
> at
> org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:528)
> at java.lang.Thread.run(Thread.java:595)
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