Folks, on a 2 node jboss cluster fronted by a 2 node RHEL EWS (Apache) running modcluster I started to receive the following error:

2011-03-22 10:11:49,652 WARN  [org.jgroups.protocols.pbcast.NAKACK] (Incoming-4,172.20.3.21:59421) 172.20.3.21:59421] discarded message from non-member 172.20.3.22:57767, my view is [172.20.3.21:59421|2] [172.20.3.21:59421]

2011-03-22 10:11:49,666 ERROR [org.jgroups.protocols.pbcast.NAKACK] (Incoming-18,172.20.3.21:59421) sender 172.20.3.22:57767 not found in xmit_table

2011-03-22 10:11:49,666 ERROR [org.jgroups.protocols.pbcast.NAKACK] (Incoming-18,172.20.3.21:59421) range is null

2011-03-22 10:11:49,667 INFO  [org.jboss.cache.RPCManagerImpl] (Incoming-18,172.20.3.21:59421) Received new cluster view: MergeView::[172.20.3.21:59421|3] [172.20.3.21:59421, 172.20.3.22:57767], subgroups=[[172.20.3.21:59421|2] [172.20.3.21:59421], [172.20.3.22:57767|0] [172.20.3.22:57767]]

2011-03-22 10:45:09,505 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/htg].[spring-ws]] (ajp-172.20.3.21-8009-3) Servlet.service() for servlet spring-ws threw exception

java.io.IOException: Strange I/O stream, returned 0 bytes on read

        at com.ctc.wstx.io.BaseReader.reportStrangeStream(BaseReader.java:148)

        at com.ctc.wstx.io.UTF8Reader.loadMore(UTF8Reader.java:373)

        at com.ctc.wstx.io.UTF8Reader.read(UTF8Reader.java:110)

        at com.ctc.wstx.io.ReaderBootstrapper.initialLoad(ReaderBootstrapper.java:245)

        at com.ctc.wstx.io.ReaderBootstrapper.bootstrapInput(ReaderBootstrapper.java:132)

        at com.ctc.wstx.stax.WstxInputFactory.doCreateSR(WstxInputFactory.java:543)

        at com.ctc.wstx.stax.WstxInputFactory.createSR(WstxInputFactory.java:604)

        at com.ctc.wstx.stax.WstxInputFactory.createSR(WstxInputFactory.java:629)

        at com.ctc.wstx.stax.WstxInputFactory.createXMLStreamReader(WstxInputFactory.java:324)

        at org.springframework.ws.soap.axiom.AxiomSoapMessageFactory.createAxiomSoapMessage(AxiomSoapMessageFactory.java:246)

        at org.springframework.ws.soap.axiom.AxiomSoapMessageFactory.createWebServiceMessage(AxiomSoapMessageFactory.java:218)

        at org.springframework.ws.transport.AbstractWebServiceConnection.receive(AbstractWebServiceConnection.java:86)

        at org.springframework.ws.transport.support.WebServiceMessageReceiverObjectSupport.handleConnection(WebServiceMessageReceiverObjectSupport.java:86)

        at org.springframework.ws.transport.http.WebServiceMessageReceiverHandlerAdapter.handle(WebServiceMessageReceiverHandlerAdapter.java:57)

        at org.springframework.ws.transport.http.MessageDispatcherServlet.doService(MessageDispatcherServlet.java:230)

        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)

        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)

        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)

        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)

        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)

        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)

        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)

        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)

        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:436)

        at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:384)

        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

        at java.lang.Thread.run(Thread.java:619)

any ideas?