Java dump and core collection

Use this page to generate various Java™ dumps and cores from within the administrative console.

To view this administrative console page, click Troubleshooting > Java dumps and cores.

Select one or more of the listed servers, and click one of the following buttons to generate dumps. You can analyze dumps and cores using problem determination tools.

Supported configurations: Generating a heap dump or a system dump is not supported for a non-IBM Java virtual machine (JVM). If you attempt to generate a heap dump or a system dump using the administrative console against a non-IBM JVM, the following message is displayed in the administrative console:

Heap dump: A heap dump is a snapshot of JVM memory. It shows live objects in the memory and references between them.; You can use this option to debug conditions such as memory leaks, heap fragmentation or to investigate what objects are consuming the largest part of the memory.
Java core: Use this button to investigate why a server is hanging or investigate messages in the logs that indicate a thread has not completed its work in the expected amount of time.

System dump: Use this button to generate system native dumps of the server process. These dumps can be quite large.