EAP 7 Undertow AjpReadListener throws StackOverflowError

Issue

• We see a StackOverflowError from repeating AjpReadListener calls like below:

ERROR [org.xnio.listener] (default I/O-17) XNIO001007: A channel event listener threw an exception: java.lang.StackOverflowError
    at org.jboss.logmanager.formatters.Formatters$7.renderRaw(Formatters.java:450)
    at org.jboss.logmanager.formatters.Formatters$JustifyingFormatStep.render(Formatters.java:215)
    at org.jboss.logmanager.formatters.MultistepFormatter.format(MultistepFormatter.java:89)
    at org.jboss.logmanager.ExtFormatter.format(ExtFormatter.java:32)
    at org.jboss.logmanager.handlers.WriterHandler.doPublish(WriterHandler.java:46)
    at org.jboss.logmanager.ExtHandler.publish(ExtHandler.java:77)
    at org.jboss.logmanager.LoggerNode.publish(LoggerNode.java:333)
    at org.jboss.logmanager.LoggerNode.publish(LoggerNode.java:341)
    at org.jboss.logmanager.LoggerNode.publish(LoggerNode.java:341)
    at org.jboss.logmanager.LoggerNode.publish(LoggerNode.java:341)
    at org.jboss.logmanager.Logger.logRaw(Logger.java:852)
    at org.jboss.logmanager.Logger.log(Logger.java:804)
    at org.jboss.logging.JBossLogManagerLogger.doLogf(JBossLogManagerLogger.java:53)
    at org.jboss.logging.Logger.logf(Logger.java:2445)
    at io.undertow.UndertowLogger_$logger.exceptionProcessingRequest(UndertowLogger_$logger.java:57)
    at io.undertow.server.protocol.ajp.AjpReadListener.handleEvent(AjpReadListener.java:252)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.sendMessages(AjpReadListener.java:316)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.handleInternalServerError(AjpReadListener.java:261)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.handleEvent(AjpReadListener.java:249)
...
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.sendMessages(AjpReadListener.java:316)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.handleInternalServerError(AjpReadListener.java:261)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.handleEvent(AjpReadListener.java:249)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.server.protocol.ajp.AjpReadListener.handleEvent(AjpReadListener.java:56)
    at org.jboss.xnio@3.8.4.Final-redhat-00001//org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
    at org.jboss.xnio@3.8.4.Final-redhat-00001//org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
    at io.undertow.core@2.2.9.SP1-redhat-00001//io.undertow.conduits.ReadTimeoutStreamSourceConduit$2.readReady(ReadTimeoutStreamSourceConduit.java:99)
    at org.jboss.xnio.nio@3.8.4.Final-redhat-00001//org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
    at org.jboss.xnio.nio@3.8.4.Final-redhat-00001//org.xnio.nio.NioHandle$1.run(NioHandle.java:50)
    at org.jboss.xnio.nio@3.8.4.Final-redhat-00001//org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612)
    at org.jboss.xnio.nio@3.8.4.Final-redhat-00001//org.xnio.nio.WorkerThread.run(WorkerThread.java:479)