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  1. JBoss Enterprise Application Platform
  2. JBEAP-19577

[GSS](7.3.z) UNDERTOW-1720 - NullPointerException at channel.write(buffer) due to a race condition in AsyncSenderImpl

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      When serving static content through the file handler, there's a possibility that the following NullPointerException could happen at buffer during writing to the channel. Possibly, response data corruption might happen in this case. A root cause of this issue could be a race condition in Underotw's Sender implementation.

      ERROR [org.xnio.listener] (default I/O-3) XNIO001007: A channel event listener threw an exception: java.lang.NullPointerException
    at org.xnio.conduits.ConduitStreamSinkChannel.write(ConduitStreamSinkChannel.java:154) [xnio-api-3.4.7.Final-redhat-1.jar:3.4.7.Final-redhat-1]
    at io.undertow.channels.DetachableStreamSinkChannel.write(DetachableStreamSinkChannel.java:187)
    at io.undertow.server.HttpServerExchange$WriteDispatchChannel.write(HttpServerExchange.java:2011)
    at io.undertow.io.AsyncSenderImpl.invokeOnComplete(AsyncSenderImpl.java:398)
    at io.undertow.io.AsyncSenderImpl.access(AsyncSenderImpl.java:41)
    at io.undertow.io.AsyncSenderImpl.handleEvent(AsyncSenderImpl.java:454)
    at io.undertow.io.AsyncSenderImpl.handleEvent(AsyncSenderImpl.java:440)
    at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) [xnio-api-3.4.7.Final-redhat-1.jar:3.4.7.Final-redhat-1]
    at io.undertow.channels.DetachableStreamSinkChannel$SetterDelegatingListener.handleEvent(DetachableStreamSinkChannel.java:285)
    at io.undertow.channels.DetachableStreamSinkChannel$SetterDelegatingListener.handleEvent(DetachableStreamSinkChannel.java:272)
    at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) [xnio-api-3.4.7.Final-redhat-1.jar:3.4.7.Final-redhat-1]
    at org.xnio.conduits.WriteReadyHandler$ChannelListenerHandler.writeReady(WriteReadyHandler.java:65) [xnio-api-3.4.7.Final-redhat-1.jar:3.4.7.Final-redhat-1]
    at io.undertow.server.protocol.ajp.AjpServerResponseConduit$AjpServerWriteReadyHandler.writeReady(AjpServerResponseConduit.java:496)
    at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:94) [xnio-nio-3.4.7.Final-redhat-1.jar:3.4.7.Final-redhat-1]
    at org.xnio.nio.WorkerThread.run(WorkerThread.java:571) [xnio-nio-3.4.7.Final-redhat-1.jar:3.4.7.Final-redhat-1]

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          Bug - A problem that impairs or prevents the functions of the product. JBEAP-19578 [GSS](7.2.z) UNDERTOW-1720 - NullPointerException at channel.write(buffer) due to a race condition in AsyncSenderImpl

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Verified
          relates to

          Bug - A problem that impairs or prevents the functions of the product. UNDERTOW-1720 Race in Sender implementations

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Resolved
          links to

          Web Link KCS#5114031

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              flaviarnn Flavia Rainone
              rhn-support-mmiura Masafumi Miura
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