Where is the Heap Dump File Saved When Using -XX: HeapDumpOnOutOfMemoryError?

Heap Dump File Location with HeapDumpOnOutOfMemoryError

The -XX: HeapDumpOnOutOfMemoryError parameter, when added to JBoss JVM startup options, facilitates the creation of a heap dump upon encountering an out-of-memory error. Understanding the location where this dump file is saved is crucial for troubleshooting purposes.

Oracle's documentation provides insights into this behavior:

"By default, the heap dump is created in a file called java_pid.hprof in the working directory of the VM."

This means that the heap dump file will be generated in the same directory where the Java Virtual Machine (JVM) is running. If no alternative path is specified, the dump will appear in the current working directory.

However, you have the option to customize the dump file's location using the -XX:HeapDumpPath= parameter. By providing an alternative file name or directory, you can direct the dump to a specific location on your system. For instance, the following setting will save the heap dump in the /disk2/dumps directory:

-XX:HeapDumpPath=/disk2/dumps

By modifying the HeapDumpPath parameter, you can ensure that heap dump files are created in a predefined location, making them easier to access and analyze during troubleshooting scenarios.

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