问题
According to documentation one could automatically take a heap dump when the application encounters an OutOfMemoryException.
After OutOfMemoryException process just disappear from left menu.
How does this feature works in VisualVM?
Thanks.
C:\work\temp>java -XX:HeapDumpPath=c:/work/temp/file.hprof -XX:+HeapDumpOnOutOfMemoryError -jar example.jar
回答1:
As far as I know, that option in JVisualVM is equivalent to specifying -XX:+HeapDumpOnOutOfMemoryError as a JVM parameter. This causes the JVM to create a heap dump file when it encounters an OutOfMemoryError. This file can be then loaded into JVisualVM (or into a profiler) and analyzed there. The directory where the file is stored is defined by the -XX:HeapDumpPath parameter.
See also:
- Troubleshooting Guide for Java SE 6 with HotSpot VM
- Java HotSpot VM Options
- StackOverflow: Using HeapDumpOnOutOfMemoryError parameter
回答2:
Seems application just exited upon OOM. In this case, you must run your app with special -XX params. See "dump" params in JVM documentation. After application dies, you can examine dump in your tool.
来源：https://stackoverflow.com/questions/8311371/java-visualvm-enable-heap-dump-on-oome