Extract thread dump from a heap dump

Question

I have a huge heap dump (around 12GB) and it will take forever to open it with MAT or jvisualvm. I only want to get the thread dump out of it without indexing the objects. Is it possible with the above or any other tools?

Is that a file obtained with `jmap`? – fge Feb 08 '15 at 09:22 — fge, Feb 08 '15 at 09:22

score 1 · Answer 1 · answered May 31 '17 at 19:28

1

Had the same problem recently.

I just pushed the project doing it on GitHub. I know, it is way too late, but probably will save some time to someone in future.

https://github.com/aafomin/obadiah

answered May 31 '17 at 19:28

Average Joe

643
5
15

Sounds awesome, I will give it a try some day – Vic May 31 '17 at 19:45
You're still here ) ok, i hope it will be useful – Average Joe May 31 '17 at 19:51
Is this tool is still available somewhere? (GitHub shows HTTP 404 instead) – Toparvion Mar 16 '22 at 04:20

score 0 · Answer 2 · answered Oct 02 '20 at 17:09

The latest snapshot versions of Memory Analyzer (preview of 1.11) have the ability to discard objects on parse. Having a discard ratio of 100% with a pattern of (?!.Thread). would discard all objects except those of a type with 'Thread' in the classname. That might speed up parsing, though the parsed dump would be nearly useless, but it would have a thread dump (but without thread names or local variables) which might be enough for your purposes.

Extract thread dump from a heap dump

2 Answers2