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From "Andreas Veithen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SYNAPSE-205) NPE in HttpCoreNIOSender and "I/O reactor has been shut down"
Date Tue, 08 Jan 2008 20:58:34 GMT

    [ https://issues.apache.org/jira/browse/SYNAPSE-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12557035#action_12557035
] 

Andreas Veithen commented on SYNAPSE-205:
-----------------------------------------

Thanks Oleg for your quick feedback. It confirms the analysis I based my patch on.

> NPE in HttpCoreNIOSender and "I/O reactor has been shut down"
> -------------------------------------------------------------
>
>                 Key: SYNAPSE-205
>                 URL: https://issues.apache.org/jira/browse/SYNAPSE-205
>             Project: Synapse
>          Issue Type: Bug
>          Components: Transports
>    Affects Versions: NIGHTLY
>            Reporter: Andreas Veithen
>            Priority: Critical
>             Fix For: 1.2
>
>         Attachments: synapse-205.patch.txt
>
>
> When the target service is not available, a request to the proxy service causes the following
exception:
> Exception in thread "HttpCoreNIOSender" java.lang.NullPointerException
> 	at org.apache.synapse.transport.nhttp.HttpCoreNIOSender$3.handleError(HttpCoreNIOSender.java:460)
> 	at org.apache.synapse.transport.nhttp.HttpCoreNIOSender$3.timeout(HttpCoreNIOSender.java:439)
> 	at org.apache.http.impl.nio.reactor.SessionRequestImpl.timeout(SessionRequestImpl.java:151)
> 	at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processTimeouts(DefaultConnectingIOReactor.java:152)
> 	at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:96)
> 	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:158)
> 	at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.executeClientEngine(HttpCoreNIOSender.java:139)
> 	at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.access$000(HttpCoreNIOSender.java:68)
> 	at org.apache.synapse.transport.nhttp.HttpCoreNIOSender$1.run(HttpCoreNIOSender.java:101)
> 	at java.lang.Thread.run(Thread.java:613)
> Any further request then fails with "java.lang.IllegalStateException: I/O reactor has
been shut down".
> The instruction in HttpCoreNIOSender that causes the NPE is as follows:
> MessageContext nioFaultMessageContext =
>     MessageContextBuilder.createFaultMessageContext(
>         mc, new AxisFault(exception.toString(), exception));
> Probably, when handleError is called by the timeout (rather than the failed) method,
as is the case here (see stacktrace), exception is null. The handleError method doesn't handle
this situation appropriately.
> Note that this issue is similar but not identical to the one described in SYNAPSE-168.

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