Heap dump not generated

Question

I have already added -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath="C:\\hd.hprof" to Default VM arguments but I don't know why the heap dump file not generated when OutOfMemoryError thrown. Can anyone halp me?

More details:

• My JRE version is 1.7.0_02

• The heap dump is generated once for the first time but when I change HeapDumpPath, it not generated anymore. Already revert HeapDumpPath to be the same as the first time but heap dump still not generated

• File C:\\hd.hprof already exists.

• Below image is the eclipse dialog when I force close eclipse. In that dialog, I can see that eclipse have included my arguments ]![Below image is the eclipse dialog when I force closing eclipse. In that dialog, I can see that eclipse have included my arguments

Thanks you.

Answer 1

一些抛出的堆溢出并不是真正的溢出，而是计算后直接抛出。实际上并没有溢出，所以不会产生堆转储。例如使用DirectByteBuffer时