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java.lang.reflect.UndeclaredThrowableException: null at org.xnio.http.HttpUpgrade$HttpUpgradeState.handleUpgrade(HttpUpgrade.java:351) at org.xnio.http.HttpUpgrade$HttpUpgradeState.access$900(HttpUpgrade.java:112) at org.xnio.http.HttpUpgrade$HttpUpgradeState$UpgradeResultListener.handleEvent(HttpUpgrade.java:335) at org.xnio.http.HttpUpgrade$HttpUpgradeState$UpgradeResultListener.handleEvent(HttpUpgrade.java:281) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66) at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:87) at org.xnio.nio.WorkerThread.run(WorkerThread.java:531)