ChannelBusyException: Too many open outbound writes

2012/10/24 08:01:52:369 EDT [ERROR][Runner - 368] HOST perf17.mw.lab.eng.bos.redhat.com:rootProcess:c - Error getting response. <java.lang.reflect.UndeclaredThrowableException>
        java.lang.reflect.UndeclaredThrowableException
        at $Proxy0.getSerialAndIncrement(Unknown Source)
        at org.jboss.smartfrog.clustering.ejb3.StatefulSBProcessorFactoryImpl$EJB3RequestProcessor.processRequest(StatefulSBProcessorFactoryImpl.java:75)
        at org.jboss.smartfrog.loaddriver.CompoundRequestProcessorFactoryImpl$CompoundRequestProcessor.processRequest(CompoundRequestProcessorFactoryImpl.java:52)
        at org.jboss.smartfrog.loaddriver.Runner.run(Runner.java:87)
        at java.lang.Thread.run(Thread.java:662)
Caused by: org.jboss.remoting3.ChannelBusyException: Too many open outbound writes
        at org.jboss.remoting3.remote.RemoteConnectionChannel.openOutboundMessage(RemoteConnectionChannel.java:112)
        at org.jboss.remoting3.remote.RemoteConnectionChannel.writeMessage(RemoteConnectionChannel.java:297)
        at org.jboss.ejb.client.remoting.ChannelAssociation.acquireChannelMessageOutputStream(ChannelAssociation.java:249)
        at org.jboss.ejb.client.remoting.RemotingConnectionEJBReceiver.processInvocation(RemotingConnectionEJBReceiver.java:196)
        at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181)
        at org.jboss.ejb.client.TransactionInterceptor.handleInvocation(TransactionInterceptor.java:42)
        at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:183)
        at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:125)
        at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:183)
        at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:136)
        at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:121)
        at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:104)

remote.connection.perf18.host=perf18
remote.connection.perf18.port=4447
remote.connection.perf18.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
remote.connection.perf18.channel.options.org.jboss.remoting3.RemotingOptions.MAX_OUTBOUND_MESSAGES=30000