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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HTTPCORE-417) Infinite loop in LengthDelimitedEncoder due to negative return from SSLIOSession.writePlain()
Date Wed, 27 Jan 2016 09:51:39 GMT

     [ https://issues.apache.org/jira/browse/HTTPCORE-417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Oleg Kalnichevski resolved HTTPCORE-417.
----------------------------------------
       Resolution: Fixed
    Fix Version/s: 5.0-alpha2
                   4.4.5

Fixed in SVN trunk and 4.4.x branch.

Oleg

> Infinite loop in LengthDelimitedEncoder due to negative return from SSLIOSession.writePlain()
> ---------------------------------------------------------------------------------------------
>
>                 Key: HTTPCORE-417
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-417
>             Project: HttpComponents HttpCore
>          Issue Type: Bug
>          Components: HttpCore NIO
>    Affects Versions: 4.4.4
>            Reporter: Miles Spielberg
>            Assignee: Oleg Kalnichevski
>            Priority: Critical
>             Fix For: 4.4.5, 5.0-alpha2
>
>
> SSLIOSession.InternalByteChannel.write(ByteBuffer) does not obey the WriteableByteChannel
contract. In writePlain(), if the channel is closed, -1 is returned, but WriteableByteChannel
should throw ClosedChannelException in this case, and should certainly never return a negative
value.
> This leads to an infinite loop in LengthDelimitedEncoder.write(). AbstractContentEncoder.writeToChannel()
returns the -1 from SSLIOSession.InternalByteChannel, and this causes remaining to grow without
bound (https://hc.apache.org/httpcomponents-core-4.4.x/httpcore-nio/xref/org/apache/http/impl/nio/codecs/LengthDelimitedEncoder.html#133).
> In my application, I see a stack trace similar to the following:
> {code}
> I/O dispatcher 2 tid=199 [RUNNABLE]
> org.apache.http.nio.reactor.ssl.SSLIOSession.access$100(SSLIOSession, ByteBuffer) SSLIOSession.java:72
> org.apache.http.nio.reactor.ssl.SSLIOSession$InternalByteChannel.write(ByteBuffer) SSLIOSession.java:811
> org.apache.http.impl.nio.codecs.AbstractContentEncoder.doWriteChunk(ByteBuffer, boolean)
AbstractContentEncoder.java:173
> org.apache.http.impl.nio.codecs.AbstractContentEncoder.doWriteChunk(ByteBuffer, int,
boolean) AbstractContentEncoder.java:166
> org.apache.http.impl.nio.codecs.AbstractContentEncoder.writeToChannel(ByteBuffer, int)
AbstractContentEncoder.java:140
> org.apache.http.impl.nio.codecs.LengthDelimitedEncoder.write(ByteBuffer) LengthDelimitedEncoder.java:132
> com.box.http.apacheasync.compat.request.ActorSubscriberContentProducer$ContentProducer$.produceContent(ContentEncoder,
IOControl) ActorSubscriberContentProducer.scala:114
> com.box.http.apacheasync.compat.request.RequestConverter$$anon$1.produceContent(ContentEncoder,
IOControl) RequestConverter.scala:78
> org.apache.http.nio.protocol.BasicAsyncRequestProducer.produceContent(ContentEncoder,
IOControl) BasicAsyncRequestProducer.java:125
> org.apache.http.impl.nio.client.MainClientExec.produceContent(InternalState, ContentEncoder,
IOControl) MainClientExec.java:262
> org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.produceContent(ContentEncoder,
IOControl) DefaultClientExchangeHandlerImpl.java:136
> org.apache.http.nio.protocol.HttpAsyncRequestExecutor.outputReady(NHttpClientConnection,
ContentEncoder) HttpAsyncRequestExecutor.java:229
> org.apache.http.impl.nio.DefaultNHttpClientConnection.produceOutput(NHttpClientEventHandler)
DefaultNHttpClientConnection.java:292
> org.apache.http.impl.nio.client.InternalIODispatch.onOutputReady(DefaultNHttpClientConnection)
InternalIODispatch.java:86
> org.apache.http.impl.nio.client.InternalIODispatch.onOutputReady(Object) InternalIODispatch.java:39
> org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(IOSession) AbstractIODispatch.java:154
> org.apache.http.impl.nio.reactor.BaseIOReactor.writable(SelectionKey) BaseIOReactor.java:190
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(SelectionKey) AbstractIOReactor.java:343
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(Set) AbstractIOReactor.java:317
> org.apache.http.impl.nio.reactor.AbstractIOReactor.execute() AbstractIOReactor.java:278
> org.apache.http.impl.nio.reactor.BaseIOReactor.execute(IOEventDispatch) BaseIOReactor.java:106
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run() AbstractMultiworkerIOReactor.java:590
> java.lang.Thread.run() Thread.java:744
> {code}



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