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Date: Wed, 23 Sep 2009 07:24:15 -0700 (PDT)
From: "Asankha C. Perera (JIRA)" <jira@apache.org>
To: dev@hc.apache.org
Subject: [jira] Commented: (HTTPCORE-206) NPE in
 DefaultClientIOEventDispatch
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    [ https://issues.apache.org/jira/browse/HTTPCORE-206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758716#action_12758716 ] 

Asankha C. Perera commented on HTTPCORE-206:
--------------------------------------------

The infinite loop could be due to Synapse ignoring exceptions and trying to keep itself alive. A possible better approach would be for it to shutdown and auto restart the reactors. 

However, this does not convey the original cause of the first runtime exception. I will try Synapse 1.2 with the 4.1-alpha1 and see if this can be re-created

> 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
>             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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