Hi, We have developed a web-based application that communicates with back-end servers. Server-Push is an important requirement of the application, and we are using CometD for this purpose. We are using the "async" support in Tomcat 7.0 for scalability. We are running the application in Tomcat 7.0.29 under RHEL.
The application has been coming along nicely when used by a small number of users: ~ 5. With a larger number (~ 25) of clients, however, we have started to see issues where Tomcat suddenly becomes unresponsive. I have been seeing one exception repeated over and over, which seems to be the culprit. Unfortunately, my searches haven't pointed me to anything useful yet. I'm hoping someone here has seen this issue, and can point me in the right direction. Jan 14, 2013 9:56:44 PM org.apache.coyote.AbstractProtocol$AbstractConnectionHandler process SEVERE: null java.lang.IllegalStateException: Calling [asyncPostProcess()] is not valid for a request with Async state [STARTED] at org.apache.coyote.AsyncStateMachine.asyncPostProcess(AsyncStateMachine.java:202) at org.apache.coyote.AbstractProcessor.asyncPostProcess(AbstractProcessor.java:116) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1653) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Any help appreciated. Satyen
