How to track java basic type array?

Question

I have a memory issue. And I found a huge char[] in heap dump. But I don't know where it come from. It is a weak/soft reference. Is there any tool/approach to track this kind of basic type array allocation?

with a jmap heap dump, you can look at the array and see what it says. Maybe that helps. Eclipse MAT is a good tool for digging through this: http://www.eclipse.org/mat/ — Thilo, Jul 20 '12 at 07:38

score 3 · Answer 1 · answered Jul 20 '12 at 07:39

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Try VisualVM, it is a very powerful tool! See VisualVM

answered Jul 20 '12 at 07:39

M. Abbas

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score 2 · Answer 2 · answered Aug 07 '12 at 06:34

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Finally I found a good way to tack array allocate. Here is link for example http://kenai.com/projects/btrace/sources/hg/content/samples/NewArray.java?rev=442

answered Aug 07 '12 at 06:34

crabhit

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score 1 · Answer 3 · answered Jul 20 '12 at 09:17

For this kind of problem, I think it's to to look into instrumentation and profiling your code. Java has hooks that allow external programs to poke around the heap. I think a great one, which has a free trial, is jprofiler

http://www.ej-technologies.com/products/jprofiler/overview.html

How to track java basic type array?

3 Answers3