How to catch OutOfMemoryError in JVM and run a script if it's caught?

Question

I have a program that sometimes throw OOME, I understand that there is a flag in the JVM options that I can set and whenever a certain Error/Exception appears (such as OOME) it calls a script I wrote. The script will give the user a notification and will call a the program with a different argument so it won't get OOME again.

does anyone know how to set this flag? what is the JVM options I need to set? I looked everywhere on line and couldn't find the answer.

help me please! Thanks, Aye

type 'java -X' at the command prompt. You will get a list of all the extended options. Might help. — Sagar V
– Sagar V, Commented Sep 29, 2010 at 11:29

slm · Accepted Answer · 2019-05-07 18:04:27Z

15

-XX:OnOutOfMemoryError="cmd args;cmd args"

From: http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html#DebuggingOptions

edited May 7, 2019 at 18:04

slm

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answered Sep 29, 2010 at 11:31

TuomasR

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1 Comment

Aye Over a year ago

wow, that one looks useful, I will check it out now. thanks :)

Andreas Dolk · Accepted Answer · 2010-09-29 11:34:17Z

-4

I found one suggestion in a forum: catch the OOME in your application (like directly in main, assuming you're single threaded) and do this in the catch handler:

catch (OutOfMemoryError not_again) {
  System.gc();
  System.runFinalization();
  System.gc();
  System.out.println("Your error message");
}

Cleaning up the heap might free just enough memory to produce a last error message before dying.

answered Sep 29, 2010 at 11:34

Andreas Dolk

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2 Comments

Aye Over a year ago

thanks, but the application is very sparse and I don't want to catch it inside I prefer to call .dat file from the JVM itself

matt b Over a year ago

one would think that the JVM would attempt a few rounds of GC before throwing an OOME itself; this isn't guaranteed to really do much of anything.

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