Hot Method Replace for debugging applications on WebSphere Application Servers (WebSphere Application Server debug)

With Hot Method Replace, you can modify your source code while debugging without restarting the application or server.

Enabling Hot Method Replace

To enable hot method replace for WebSphere Application Servers started from within IBM Rational Software Development Platform: In the Overview tab for the server editor, ensure that the Enable hot method replace in debug mode check box is selected.

To enable hot method replace when starting WebSphere Application Servers from outside IBM Rational Software Development Platform:

In the Administrative Console, go to the Debugging Service page for your server.
Ensure that the Enable service at server startup or Startup check box is selected.
In the arguments field, add the following to the beginning of the argument list: -Xj9 -Dcom.ibm.ws.classloader.j9enabled=true
Restart the server.

When debugging applications on WebSphere Application Server using hot method replace, there are some limitations. To learn about these limitations, see the WebSphere Application Server debug limitations topic below.

Related concepts

Hot Method Replace for debugging Java applications