Can Sun JDK generate core/heap dump files when JVM crashes?

java coredump jvm-crash
cheng picture cheng · Jun 8, 2012 · Viewed 19.4k times · Source

Is there anyway to generate core/heap dump file when JVM crashes? Since these files are usually very helpful to find out bugs in code.

Answer

Tomasz Nurkiewicz picture Tomasz Nurkiewicz · Jun 8, 2012

With the following JVM options:

-XX:+HeapDumpOnOutOfMemoryError 
-XX:HeapDumpPath="/tmp"

JVM will dump the content of heap to a file in specified directory. Note that this only happens when OutOfMemoryError is thrown since dump isn't really needed if JVM crashed due to a different reason.

Edit: "Boolean options are turned on with -XX:+ and turned off with -XX:-." docs

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