javacoredumpjvm-crash

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

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.

Solution

  • 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