Obtaining a Thread Dump

This section explains how to obtain a thread dump for Application Server 8.1. By default, the server dumps a core file and restarts with the -Xrs java-option flag in the server.xml file.

On UNIX

The following procedure describes how to obtain a server thread dump on UNIX.

To obtain a server thread dump on UNIX

Steps

1. Verify that the server.xml file for the affected server instance does not include the -Xrs java-option flag. Remove the -Xrs java-option flag if it exists.

2. If the option is changed, restart the server instance.

3. Use the ps command to determine the java and/or appservDAS processes under which the application server is running.

4. Run the following command on the application server instance:

   kill -3 pid

   The kill command redirects the thread dump to the server.log file for server the instance.

On Windows

The following procedure describes how to obtain a server thread dump on Windows.

To obtain a server thread dump on Windows

Steps

1. Verify that the server.xml file for your server instance does not include the -Xrs java-option flag. Remove the -Xrs java-option flag if it exists.

2. If the option was changed, restart your Application Server.

3. Type ctrl-brk in the Application Server window. The thread dump will be redirected to the server.log file for the instance.