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Date: Tue, 6 Sep 2011 11:53:09 +0000 (UTC)
From: "Oleg Kalnichevski (JIRA)" <jira@apache.org>
To: dev@hc.apache.org
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Subject: [jira] [Resolved] (HTTPASYNC-6) I/O reactor (client) terminates
 abnormally when a connection is prematurely closed probably because of
 timeout settings. A NullpointerException is thrown when a response is being
 read and the connection is already closed and set to null
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     [ https://issues.apache.org/jira/browse/HTTPASYNC-6?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Oleg Kalnichevski resolved HTTPASYNC-6.
---------------------------------------

    Resolution: Fixed

Menno,

I applied a fix for the problem to SVN trunk. However, since there was no reliable reproducer the fix is based on my assumption as to what the cause might have been. It would be great if you could reproduce the problem with the wire / context logging turned on and attach the log to this ticket.

Please re-test your application against the latest SVN snapshot to verify the fix.

Oleg   

> I/O reactor (client) terminates abnormally when a connection is prematurely closed probably because of timeout settings. A NullpointerException is thrown when a response is being read and the connection is already closed and set to null
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HTTPASYNC-6
>                 URL: https://issues.apache.org/jira/browse/HTTPASYNC-6
>             Project: HttpComponents HttpAsyncClient
>          Issue Type: Bug
>    Affects Versions: 4.0-alpha2
>         Environment: Windows Vista , Sun Java SDK 1.6.0_26
>            Reporter: Menno van Gangelen
>            Priority: Critical
>             Fix For: 4.0-alpha3
>
>
> The following line should have a check for null.
> org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.responseCompleted(DefaultAsyncRequestDirector.java:366);
> =>           if (this.managedConn.isOpen()) {
> Hard to reproduce as it seems to be a racing issue when reading from slow websites.
> 2011-09-03 10:40:53,312 [I/O dispatcher 2] ERROR DefaultHttpAsyncClient - Fatal runtime error
> java.lang.NullPointerException
> 	at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.responseCompleted(DefaultAsyncRequestDirector.java:366)
> 	at org.apache.http.impl.nio.client.NHttpClientProtocolHandler.processResponse(NHttpClientProtocolHandler.java:357)
> 	at org.apache.http.impl.nio.client.NHttpClientProtocolHandler.inputReady(NHttpClientProtocolHandler.java:196)
> 	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:172)
> 	at org.apache.http.impl.nio.client.InternalClientEventDispatch.inputReady(InternalClientEventDispatch.java:76)
> 	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:161)
> 	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:335)
> 	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
> 	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:542)
> 	at java.lang.Thread.run(Thread.java:662)
> 2011-09-03 10:40:53,692 [Thread-4] ERROR DefaultHttpAsyncClient - I/O reactor terminated abnormally
> org.apache.http.nio.reactor.IOReactorException: I/O dispatch worker terminated abnormally
> 	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:321)
> 	at org.apache.http.impl.nio.conn.PoolingClientConnectionManager.execute(PoolingClientConnectionManager.java:91)
> 	at org.apache.http.impl.nio.client.AbstractHttpAsyncClient.doExecute(AbstractHttpAsyncClient.java:441)
> 	at org.apache.http.impl.nio.client.AbstractHttpAsyncClient.access$000(AbstractHttpAsyncClient.java:95)
> 	at org.apache.http.impl.nio.client.AbstractHttpAsyncClient$1.run(AbstractHttpAsyncClient.java:462)
> Caused by: java.lang.NullPointerException
> 	at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.responseCompleted(DefaultAsyncRequestDirector.java:366)
> 	at org.apache.http.impl.nio.client.NHttpClientProtocolHandler.processResponse(NHttpClientProtocolHandler.java:357)
> 	at org.apache.http.impl.nio.client.NHttpClientProtocolHandler.inputReady(NHttpClientProtocolHandler.java:196)
> 	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:172)
> 	at org.apache.http.impl.nio.client.InternalClientEventDispatch.inputReady(InternalClientEventDispatch.java:76)
> 	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:161)
> 	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:335)
> 	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
> 	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:275)
> 	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
> 	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:542)
> 	at java.lang.Thread.run(Thread.java:662)
> Subsequent calls fail with the following exception
> java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Client has been shut down

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