NullPointerException :: UT005018: Exception invoking close listener

2016-04-20 12:43:12,898 | ERROR | XNIO-1 I/O-7 | io.undertow.request | UT005018: Exception invoking close listener io.undertow.server.protocol.http.HttpServerConnection$1@751bdd21
java.lang.NullPointerException
        at io.undertow.server.protocol.http.HttpResponseConduit.bufferDone(HttpResponseConduit.java:279) ~[undertow-core-1.3.0.Final.jar:1.3.0.Final]
        at io.undertow.server.protocol.http.HttpResponseConduit.freeBuffers(HttpResponseConduit.java:751) ~[undertow-core-1.3.0.Final.jar:1.3.0.Final]
        at io.undertow.server.protocol.http.HttpServerConnection$1.closed(HttpServerConnection.java:81) ~[undertow-core-1.3.0.Final.jar:1.3.0.Final]
        at io.undertow.server.AbstractServerConnection$CloseSetter.handleEvent(AbstractServerConnection.java:310) [undertow-core-1.3.0.Final.jar:1.3.0.Final]
        at io.undertow.server.AbstractServerConnection$CloseSetter.handleEvent(AbstractServerConnection.java:296) [undertow-core-1.3.0.Final.jar:1.3.0.Final]
        at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) [xnio-api-3.3.2.Final.jar:3.3.2.Final]
        at org.xnio.StreamConnection.invokeCloseListener(StreamConnection.java:80) [xnio-api-3.3.2.Final.jar:3.3.2.Final]
        at org.xnio.Connection.close(Connection.java:142) [xnio-api-3.3.2.Final.jar:3.3.2.Final]
        at org.xnio.IoUtils.safeClose(IoUtils.java:134) [xnio-api-3.3.2.Final.jar:3.3.2.Final]
        at io.undertow.conduits.WriteTimeoutStreamSinkConduit$1.run(WriteTimeoutStreamSinkConduit.java:70) [undertow-core-1.3.0.Final.jar:1.3.0.Final]
        at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:560) [xnio-nio-3.3.2.Final.jar:3.3.2.Final]
        at org.xnio.nio.WorkerThread.run(WorkerThread.java:462) [xnio-nio-3.3.2.Final.jar:3.3.2.Final]