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From Sam Crawford <samcrawf...@gmail.com>
Subject Re: HttpCore NIO IOReactorException
Date Fri, 11 Jun 2010 11:05:37 GMT
Hi Oleg,

Thanks for the quick response as always!

I should point out that the client causing this exception is outside
of our control (indeed I have no idea who rl143.1blu.de is, or what
data they're sending). They could well be sending an entity enclosing
request without an entity.

I'll try to find a reproducable test case for this using the logging
examples you mentioned. We see it every couple of days.



On 11 June 2010 11:58, Oleg Kalnichevski <olegk@apache.org> wrote:
> On Fri, 2010-06-11 at 11:33 +0100, Sam Crawford wrote:
>> Morning,
>> We've just put together our first HttpCore-based server and we're
>> intermittently seeing an exception in our logs which is causing the
>> entire server to shutdown.
>> INFO com.acmecorp.proj.http.HttpSSLServer: Connection open:
>> [rl143.1blu.de/]
>> ERROR com.acmecorp.proj.http.HttpSSLServer: I/O error
>> org.apache.http.nio.reactor.IOReactorException: I/O dispatch worker
>> terminated abnormally
>>         at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:326)
>>         at com.acmecorp.proj.http.HttpSSLServer$1.run(HttpSSLServer.java:162)
>> Caused by: java.lang.NullPointerException
>>         at org.apache.http.nio.protocol.AsyncNHttpServiceHandler.inputReady(AsyncNHttpServiceHandler.java:317)
>>         at org.apache.http.impl.nio.DefaultNHttpServerConnection.consumeInput(DefaultNHttpServerConnection.java:179)
>>         at org.apache.http.impl.nio.SSLServerIOEventDispatch.inputReady(SSLServerIOEventDispatch.java:225)
>>         at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:153)
>>         at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:314)
>>         at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:294)
>>         at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:256)
>>         at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:96)
>>         at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:556)
>>         at java.lang.Thread.run(Thread.java:619)
>> INFO com.acmecorp.proj.http.HttpSSLServer: Shutdown HTTP server
>> Can you advise if this is related to the item discussed in
>> http://hc.apache.org/httpcomponents-core-4.0.1/tutorial/html/nio.html#d0e1240,
>> or is it likely to be an unrelated issue with our code? The NPE
>> suggests to me that it's more likely to be our code.
>> Thanks,
>> Sam
> NPE is thrown because the consuming entity is null, which should never
> be the case for entity enclosing requests, so this is likely to be a bug
> in AsyncNHttpServiceHandler.
> Could you please try to put together a test case that reproduces the
> problem?
> You may also want to take a look at the logging extensions in the
> contrib package that generally make debugging somewhat easier
> http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/httpcore-contrib/src/main/java/org/apache/http/contrib/logging/
> One indeed can work this problem around by preventing the I/O reactor
> form shutting itself down in case of a runtime exception. We should
> however rather try to find out why NPE is thrown in the first place.
> Oleg
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