OnOutOfMemoryError issue

robin444 · 01-23-2014, 05:25 AM

I am writing a shell script in which i am trying to kill a process when out of memory occurs.

My script line is

JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError="kill -9 %p""

But when i deploy or start the script i always get
an error as -9: command not found

I have tried all the kill signals to kill the process (-SIGKILL , -15 etc..) also i tried putting single quotes instead of double quotes like JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError='kill -9 %p'"
but nothing seems to work.

Please help as this is very urgent

business_kid · 01-23-2014, 05:58 AM

alias kil='kill -9' in an early line,

later

JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError="kill %p""?

robin444 · 01-23-2014, 06:26 AM

Quote:

Originally Posted by business_kid

alias kil='kill -9' in an early line,

later

JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError="kill %p""?

No i havent menioned any alias as kil

The occurance of kill -9 is only in this line

JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError="kill -9 %p""

No matter where i place kill -9 i always get the error -9 command not found

gengisdave · 01-23-2014, 06:30 AM

wrote in the other thread

try JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError='kill;-9;%p'"

http://www.oracle.com/technetwork/ja...sp-140102.html

robin444 · 01-23-2014, 07:11 AM

Quote:

Originally Posted by gengisdave

wrote in the other thread

try JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError='kill;-9;%p'"

http://www.oracle.com/technetwork/ja...sp-140102.html

That solved the error

Thanks a ton!!!!!

One more clarification Will the kill command do its job on out of memory?

Could you tell me what the issue was?

gengisdave · 01-23-2014, 07:18 AM

it's a strange behaviour on command line parser, instead of spaces use semicolons to separate arguments, some people asked oracle to change this (about two years ago), but it never happened

sundialsvcs · 01-23-2014, 09:36 AM

Offhand, it strikes me that "unleashing the Finger Of God," in the form of "the killing curse that cannot be ignored," probably isn't the best thing to do in this case.

The process will run out of memory, and if it does so, it will ... vanish without a trace and without a clue. You might at the very least wish to use a signal that will force a core-dump so that you can try to figure out what the root-cause of the problem is.

JVM has very good memory-management and should never "run out of memory," unless there is (and, undoubtedly, there is...) a very serious programming bug (logic error ... design flaw) in the system that it's being called upon to run. Well, you'll never solve the problem by destroying the evidence. And the system of which this is a part will never be reliable. There's a big difference between making an inconvenient problem disappear, and solving it.

robin444 · 01-27-2014, 03:12 AM

Quote:

Originally Posted by gengisdave

wrote in the other thread

try JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError='kill;-9;%p'"

http://www.oracle.com/technetwork/ja...sp-140102.html

i could deploy the service properly but when out of memory happened...this is the error i got

# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="'kill;-9;%p'"
# Executing /bin/sh -c "'kill"...
sh: -c: line 0: unexpected EOF while looking for matching `''
sh: -c: line 1: syntax error: unexpected end of file
# Executing /bin/sh -c "-9"...
sh: -9: invalid option
Usage: sh [GNU long option] [option] ...
sh [GNU long option] [option] script-file ...
GNU long options:
--debug
--debugger
--dump-po-strings
--dump-strings
--help
--init-file
--login
--noediting
--noprofile
--norc
--posix
--protected
--rcfile
--rpm-requires
--restricted
--verbose
--version
--wordexp
Shell options:
-irsD or -c command or -O shopt_option (invocation only)
-abefhkmnptuvxBCHP or -o option
# Executing /bin/sh -c "23979'"...
sh: -c: line 0: unexpected EOF while looking for matching `''
sh: -c: line 1: syntax error: unexpected end of file

Please help

gengisdave · 01-27-2014, 03:22 AM

he doesn't like single quote, let's try double quote, then the only way left is using a script; as you see, he doesn't execute first arg (kill) passing the other two as argument, he treat them like 3 commands to launch

JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError=\"kill;-9;%p\""

robin444 · 01-27-2014, 03:48 AM

Quote:

Originally Posted by gengisdave

he doesn't like single quote, let's try double quote, then the only way left is using a script; as you see, he doesn't execute first arg (kill) passing the other two as argument, he treat them like 3 commands to launch

JVM_ARGS="-Xms1536m -Xms1536m -XX:OnOutOfMemoryError=\"kill;-9;%p\""

Error not solved

. i am still getting the same response.
yes it's taking it as 3 different arguments.
Any suggestions on how to solve this.

gengisdave · 01-27-2014, 04:12 AM

Code:

import java.util.Vector;

public class MemoryEater
{
  public static void main(String[] args)
  {
    Vector v = new Vector();
    while (true)
    {
      byte b[] = new byte[1048576];
      v.add(b);
    }
  }
}

$ java -XX:OnOutOfMemoryError="kill -9 %p" MemoryEater
...
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="kill -9 %p"
# Executing /bin/sh -c "kill -9 28502"...
Killed
$

this work, i think the problem is with JVM_ARGS

robin444 · 01-27-2014, 04:18 AM

Quote:

Originally Posted by gengisdave

Code:

import java.util.Vector;

public class MemoryEater
{
  public static void main(String[] args)
  {
    Vector v = new Vector();
    while (true)
    {
      byte b[] = new byte[1048576];
      v.add(b);
    }
  }
}

$ java -XX:OnOutOfMemoryError="kill -9 %p" MemoryEater
...
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="kill -9 %p"
# Executing /bin/sh -c "kill -9 28502"...
Killed
$

this work, i think the problem is with JVM_ARGS

I wish it would work the same in shell script

Any other way i can get this thing solved/any alternatives?

gengisdave · 01-27-2014, 04:22 AM

can't you move the command from jvm_args to java command line?

robin444 · 01-27-2014, 04:29 AM

Quote:

Originally Posted by gengisdave

can't you move the command from jvm_args to java command line?

No.My program requirement is that the JVM arguments should be setup in the script itself.
That cannot be changed.

gengisdave · 01-27-2014, 04:46 AM

hoping you use bash (don't know if it works with other shells) just create a script "killjava.sh" or whatever you want it called:

Code:

#!/bin/bash

kill -9 $PPID

you can put it in the same script directory and call it by "./killjava.sh", or put in any directory of $PATH, like /usr/local/bin and call it directly by "killjava.sh"; remember to 'chmod 755 killjava.sh' or you'll get "Permission denied"