Processing 1.0 - Processing Discourse - java.lang.OutOfMemoryError: Java heap space

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Index › Programming Questions & Help › Processing Implementations › java.lang.OutOfMemoryError: Java heap space

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java.lang.OutOfMemoryError: Java heap space (Read 4884 times)

wilson 619 YaBB Newbies Offline Posts: 3	java.lang.OutOfMemoryError: Java heap space Dec 30^th, 2009, 12:46am I get an out of memory error when i run rp5 run, how can i increase the heap space?

jashkenas

Re: java.lang.OutOfMemoryError: Java heap space
Reply #1 - Dec 31^st, 2009, 12:45pm

Hey Wilson.

You can put a "java_args.txt" file in your sketch's "data" folder, containing any arguments you wish to pass to the JVM, including heap memory size.

That way, even if you bundle up your sketch as an application, it'll use the correct JVM settings, even when not run from the command line.

This has been mentioned before, regarding stack size, here:
http://processing.org/discourse/yabb2/num_1242228868.html#5

Cheers,
-- Jeremy

primeclub

Re: java.lang.OutOfMemoryError: Java heap space
Reply #2 - Feb 24^th, 2010, 4:35am

Hi
i was just running into the same problem, using a lot of video switching with the JMC library:

Exception in thread "JMC MediaProvider EventQueueThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "Animation Thread" java.lang.OutOfMemoryError: Java heap space

i increased the memory now with this line:
-Xms528m -Xmx1000m

however, the error occurred after 5,5 hours. it's an application that runs in a terminal for a whole night.
is there a way to monitor/see the heap size while the app is running? like a terminal or console, something like that?

i'm on os x 10.6.2
thanks!

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: java.lang.OutOfMemoryError: Java heap space Reply #3 - Feb 24^th, 2010, 6:44am Normal JDK comes with JVisualVM application which allows to see the memory and CPU usage of a Java application. I don't know if you have it on Mac OS but it can be downloaded separately.

primeclub

Re: java.lang.OutOfMemoryError: Java heap space
Reply #4 - Feb 24^th, 2010, 3:21pm

thanks for that, i also found "jconsole", that also monitors the heap mem and seems a bit more lightweight.

now i was making some tests, but it seems that the memory settings in java_args.txt totally get ignored. the only setting that affects the heap size is the maximum memory in processing's preferences. also when i export it as an app.

here 2 screenshots.
java_args.txt (located in the scetches 'data' folder) has this setting:
-Xms528m -Xmx1000m

this i get with processing set to 1024MB in preferences:

and this with processing set to 24 MB in prefs:

seems like 64 is the minimum you can go.
and the 1000M max in the txt file are ignored.

which then lets me wonder: that sketch that crashed last night after 5,5 hrs already had 1024MB heap size, because i had the preferences set all the time to 1024MB.
how can a crash happen? i let it run again today for 4 hours and heap didn't exceed 60MB.

mhhh.

PhiLho

Re: java.lang.OutOfMemoryError: Java heap space
Reply #5 - Feb 24^th, 2010, 11:05pm

"i also found "jconsole", that also monitors the heap mem and seems a bit more lightweight."

jconsole is the ancestor of JVisualVM, on Windows both are very small exes, probably running some Java program hiding in jars shipped with JDK...

"it seems that the memory settings in java_args.txt totally get ignored."

Are you using Ruby Processing? I think rp5 mentioned by OP is that implementation, so the java_args trick probably works only for that.

primeclub

Re: java.lang.OutOfMemoryError: Java heap space
Reply #6 - Feb 25^th, 2010, 1:52am

ah no, i didn't see that small r

i'm just using the normal processing 1.0.9 for os x.

will make more tests, i still don't know how it came to that error. maybe memory leak in JMC lib. because it seems i can control the maximum heap size in P's preferences, and that's fine with me then. and the 1GB heap space should be more than enough.

Was searching about this topic, but didn't find answers: is there a way to catch that exception and then let the program re-initialize for example some tricks to prevent it to stop
or, at least, to let it quit on the error, and not just to hang then i could use a program like keep-it-up ( http://users.skynet.be/keepitup/ ) to let it get automatically restarted.

PhiLho

Re: java.lang.OutOfMemoryError: Java heap space
Reply #7 - Feb 25^th, 2010, 5:10am

Quote:

is there a way to catch that exception and then let the program re-initialize for example?

I suppose you can wrap the critical section (JMC calls) with a try { } catch (OutOfMemoryError e) { exit(); }
Or do a periodical action (eg. touch a file) and monitor that with an external utility, killing the process and restarting it if nothing is done for a while.

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