How to pin point a memory leak in a heap dump using jhat/jvisualvm tool?

Question

How to pin point a memory leak in a heap dump using jhat/jvisualvm tool?

I have a heap dump of our application generated using jmap during an "OutOfMemoryError:Java Heap Space error". I used jhat to analyse the dump but the info is too huge and I could not find where the memory leak occurred.Please help me in pin-pointing the objects that caused memory leaks.

Answer 1

Visual VM will show you that the perm gen is filled, which means OOM error.

When you get that heap dump , you'll be able to see the object with the most instances. That should give you a clue as to the culprit.