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

问题

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. Any help is appreciated.

cheng

回答1:

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

回答2:

You can use -XX:HeapDump JVM options.

来源：https://stackoverflow.com/questions/10944082/can-sun-jdk-generate-core-heap-dump-files-when-jvm-crashes