Identifying blocked threads

You can identify blocked threads on the Thread Contention (THRDCON) view. On THRDCON you can identify threads that are in blocked state. A blocked state exists when one method is waiting for a Java resource held by another thread in the same JVM.

Related topics

Working-with-timed-discovery

To identify blocked threads

  1. Select the Thread Contention option on EZJE.
  2. Hyperlink on the Thread Name field for a thread in BLOCKED state to see additional information in on the Thread Detail view (THRDDTLD).
Example

The following figure shows a sample of the THRDCON view with contentions (BLOCKED thread state) in Thread-10, Thread-11, Thread-13, Thread-14, Thread-17:

thrdcon_view.png


 In this example, you can hyperlink from Thread-10 to access detailed information on the THRDDTLD view:

thrddtld_view.png

On THRDDTLD, Lock Owner Name shows the line number of the Java class in another thread (Thread-11) where the lock occurred. Blocked Object identifies the object for which the blocked thread (Thread-10) is waiting (java.lang.String@d388acf1).

 

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