maxthread-ajp error and the services are down

Issue

• An application hosted on JBOSS platform and our application is not responding and found the maxthread alarm.
• Captured three thread dumps over a two minute period, and found many threads blocked in states like this:

        "ajp-10.10.10.10-18009-500" daemon prio=3 tid=0x0bbc3400 nid=0x129c waiting for monitor entry [0x46bde000]
           java.lang.Thread.State: BLOCKED (on object monitor)
            at org.apache.log4j.Category.callAppenders(Category.java:204)
            - waiting to lock <0x78159e70> (a org.apache.log4j.Logger)
            at org.apache.log4j.Category.forcedLog(Category.java:391)
            at org.apache.log4j.Category.log(Category.java:856)
            at net.example.logging.Log4jLoggerImpl.info(Log4jLoggerImpl.java:139)
            at com.example.shared.security.MyRequestHandler.handleRequest(MyRequestHandler.java:77)