JBoss Application server not able to serve request coming from apache proxy

Hi Alfredo,

It looks like 11 ajp threads are stuck because they are waiting for a response from the external service. Here is a stack trace of thread - 

stackTrace:
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:152)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:1124)
at org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:1206)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:438)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:420)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926)
at java.lang.Thread.run(Thread.java:745)
Locked ownable synchronizers:
- None

JDK's java.net layer uses SocketInputStream.socketRead0() API to read and receive the data from the external application. Sometimes your application might not get a response from the external applications. In that case, your application thread will be stuck in this java.net.SocketInputStream.socketRead0() API.

Hello Alfredo!

 I don't see any problems in this thread dump. Is this question redundant/duplicate of the question posted here: https://answers.ycrash.io/question/application-server-doesnt-serve-request-due-to-blocked-thread?q=520

Hi Ram,

yes it is.

Thanks a lot for your reply , we are investigating the problem and your help is very valuable.

Alfredo