NRE 8.x: How to clear Java Cache, enable Java Console and Debugging.

NetWorker Runtime Environment (NRE) provides the Java Runtime Environment (JRE) used by the NetWorker authentication service and NetWorker Management Console (NMC).

If Oracle JRE is used instead of NRE JRE, see NetWorker: How To Clear Java Cache, enable Java Console and Debugging (Oracle Java).

Clearing Java Cache:

1. On the NMC client, open a Windows File Explorer.
2. Go to the NRE install location; default: C:\Program Files\NRE\java
3. Depending on the NRE version installed, a different JRE folder may be seen. To open the Java control panel, go to ..\jre#.#.#_###\bin\ and open javacpl.exe
4. From the General tab, click Settings.

5. From the Temporary Files and Settings window, click Delete Files. 
6. Ensure Trace and Log Files and Cache Applications and Applets is checked, click Ok.

7. Click Ok to close out the remaining windows.

Enable Java Console:

1. On the NMC client, open a Windows File Explorer.
2. Go to the NRE install location; default: C:\Program Files\NRE\java
3. Depending on the NRE version installed, a different JRE folder may be seen. To open the Java control panel, go to ..\jre#.#.#_###\bin\ and open javacpl.exe
4. Click the Advanced tab.
5. Ensure that Enable Tracing and Enable Logging are checked.
6. Click the Show Console radio button.

7. Click Apply.
8. Click Ok to close the Java control panel.
9. To Disable the console, repeat the process but select Hide Console.

Enable Java Debug:

1. Enable the Java Console as per the above steps.
2. Open the NRE NMC Launcher.
3. Log in to the NetWorker Management Console.
4. From the Enterprise window, CTRL+SHIFT+Right-Click.
5. Click Save Debug Messages… and specify an output location.

6. In the Enterprise window, CTRL+SHIFT+Right-Click again.
7. From Set Debug Level, select the wanted debug level. Usually, 7.

8. Perform actions within NMC which require debug. Copy the output from the Java Console session and collect the Java output file that is created in step 5.
9. To disable debug, repeat the process but set Debug Off.

Enabling NRE Debug:

Enable NMC (gstd) Debug:

Debugging can be enabled on the NMC's gst service from the NetWorker Management Console.

1. From the NMC's Enterprise screen, click the Setup tab.
2. Click the Setup menu and select System Options.

3. From System Options, set the Debug Level as required, typically 9.

4. No service restart is required, perform actions from NMC requiring debug.
5. Render the gstd.raw from the NMC server.

6. Collect the rendered gstd.raw file from the NMC server.

Additional Debug procedures:

• NetWorker: How To Enable AUTHC DEBUG for Troubleshooting Purposes
• NetWorker: How to Enable REST API Debugging
• NetWorker: How to enable RabbitMQ Debugging
• NetWorker Management Web UI (NWUI): Triage and Troubleshooting Guide