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Bug 206586 - Memory leak
Summary: Memory leak
Status: RESOLVED FIXED
Alias: None
Product: java
Classification: Unclassified
Component: Compiler (show other bugs)
Version: 7.1
Hardware: PC Windows 7
: P2 normal (vote)
Assignee: Dusan Balek
URL: http://netbeans.org/projects/profiler...
Keywords:
Depends on:
Blocks:
 
Reported: 2011-12-20 16:10 UTC by _ gtzabari
Modified: 2012-01-25 16:38 UTC (History)
1 user (show)

See Also:
Issue Type: DEFECT
Exception Reporter:

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Description _ gtzabari 2011-12-20 16:10:04 UTC 
Product Version: NetBeans IDE Dev (Build 201112130600)
Java: 1.7.0_01; Java HotSpot(TM) Client VM 21.1-b02
System: Windows 7 version 6.1 running on x86; Cp1252; en_US (nb)
User directory: C:\Users\g.tzabari\.netbeans\dev
Cache directory: C:\Users\g.tzabari\.netbeans\dev\var\cache

I've noticed that dev builds over the past couple of weeks seem to leak memory fairly fast. After 2 hours of usage my IDE went from 200MB heap to 600MB. I don't have repro steps but I keep on running across bug 206185 so it might be related (maybe it leaks memory every time an exception is thrown... just a guess).

In any case, how do we investigate this further?
Comment 1 Marian Mirilovic 2011-12-29 10:23:40 UTC 
reassign to performance team for further investigation
Comment 2 Tomas Hurka 2012-01-02 11:19:55 UTC 
(In reply to comment #0)
> 
> In any case, how do we investigate this further?
You should use the IDE till OutOfMemoryError happens. Once it happens, IDE should automatically report this OOME via exception reporter and it also attaches compressed heap dump. This should be enough for us to start investigating the issue.
Comment 3 _ gtzabari 2012-01-13 13:25:32 UTC 
This doesn't work. When the OOME occurs, the IDE is so unresponsive it never finishes sending the heap dump. Either that, or the dump is too big. I took a look and the generate dump is 1.3GB. Even if I force the IDE to use a smaller  max memory I expect the heap dump to be 100s of MBs. What should I do?
Comment 4 Petr Cyhelsky 2012-01-13 13:33:04 UTC 
Please share(for example via megashare or some similar service) with us the Zipped! heap dump - you can find it in YourNetbeansUserDir/var/log/
Comment 5 _ gtzabari 2012-01-13 14:02:14 UTC 
I took a quick look at the heap dump and I see 3 major offenders:

JavadocEnv$JavadocField (428MB, 35%)
Symbol$VarSymbol (396MB, 33%)
HeapMap$Entry (181MB, 15%)

I've also managed to compress the heap dump to 111MB. I'm going to try reproducing the OOME with a smaller heap (250MB). Hopefully I'll end up with a compressed heap dump of 10MB...
Comment 6 _ gtzabari 2012-01-13 14:03:21 UTC 
Sorry, I'll keep the issue closed until I've attached the dump.
Comment 7 Tomas Hurka 2012-01-13 14:06:51 UTC 
(In reply to comment #5)
> I took a quick look at the heap dump and I see 3 major offenders:
> 
> JavadocEnv$JavadocField (428MB, 35%)
> Symbol$VarSymbol (396MB, 33%)
> HeapMap$Entry (181MB, 15%)
> 
> I've also managed to compress the heap dump to 111MB. I'm going to try
> reproducing the OOME with a smaller heap (250MB). Hopefully I'll end up with a
> compressed heap dump of 10MB...

Ok, thanks. We are looking for the heap dump...
Comment 8 _ gtzabari 2012-01-13 15:08:55 UTC 
Here is a heap dump I generated for -Xmx250m: http://www.megaupload.com/?d=1S48022C

Let me know if it's enough. Otherwise I will attached the larger heap dump which is 111MB.
Comment 9 Tomas Hurka 2012-01-13 16:14:53 UTC 
(In reply to comment #8)
> Here is a heap dump I generated for -Xmx250m:
> http://www.megaupload.com/?d=1S48022C
Why this is rar archive? Can't you use zip?
Comment 10 _ gtzabari 2012-01-13 16:41:54 UTC 
There is a significant size difference (40MB to 57MB). Even more so for the large heap dump. I can re-upload the dump in the form of a zip if I must but I'd rather avoid it. Let me know.
Comment 11 Tomas Hurka 2012-01-13 17:13:07 UTC 
(In reply to comment #10)
> There is a significant size difference (40MB to 57MB). Even more so for the
> large heap dump. I can re-upload the dump in the form of a zip if I must but
> I'd rather avoid it. Let me know.
You can leave it as it is, but please don't use rar in the future.
Comment 12 Tomas Hurka 2012-01-14 10:23:39 UTC 
Zipped heap dump is here: http://netbeans.org/projects/profiler/downloads/download/Heapdumps/heapdump-206586.zip
Comment 14 Quality Engineering 2012-01-25 16:38:00 UTC 
Integrated into 'main-golden', will be available in build *201201250600* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Changeset: http://hg.netbeans.org/main/rev/aeae74c6a3a7
User: Dusan Balek <dbalek@netbeans.org>
Log: Issue #206586: Memory leak - fixed. Do not create JavaDocs for local variables.