Enabling diagnostic logging for Java dumps

You can enable diagnostic logging for Java dumps.

Procedure

Go to Manage > Configuration > Diagnostic logging.
On the Built-in topics tab, select the Show all check box.
Select the JAVA_DUMP topic.
Click the More icon and then select Download topic.
Create a customized JAVA_DUMP.json file:
1. Open the downloaded JAVA_DUMP.json in a text editor.
2. Edit the sections Logger definitions and dumpDescription, as required, to customize the information that you want to capture.
3. Save your changes.
Enable your custom JAVA_DUMP.json file for your Cognos Analytics environment.
1. In the Diagnostic logging panel, Select the Custom topics tab.
2. Click the Upload topic icon .
3. Navigate to the JAVA_DUMP.json file that you modified and then click Open.
  
  The file is uploaded to Cognos Analytics and JAVA_DUMP appears in the Custom topics list.
4. Click Apply.
  
  This message appears:
  
  Successfully enabled topic JAVA_DUMP.
Go to installation_location/configuration/data/logging and open the file dump_rules.properties in a text editor and view the content.
Tip: This file was created when you enabled your customized JAVA_DUMP file and contains the customizations that you set.
Note: When a Java dump occurs, it can take a few minutes. After it finishes, two files are produced:
- installation_location/bin64/core.core_id.dmp
- installation_location/bin64/heapdump.heapdump_id.phd
Analyze the .dmp and .phd files that were generated by a core dump, as necessary.
When you are done, restore the JAVA_DUMP.json file used by Cognos Analytics to its default version:
1. Select the Built-in topics tab and then select AAA.
2. Click Reset.
3. Select AAA again and then click Apply.
To remove your custom JAVA_DUMP topic, follow these steps:
1. Select the Custom topics tab and then select JAVA_DUMP.
2. Click the More icon and click Delete.
3. Click OK to confirm the deletion and click Apply.