Java Process takes more memory and Machine stop working

Question

I am new to Linux, I am using Ubuntu 14.04LTS, But suddenly my machine stop working.I run

$ free -m

and get results

total       used       free     shared    buffers     cached
Mem:          7897       4318       3578        313         84       2054
-/+ buffers/cache:       2179       5717
Swap:         8013          0       8013

and when I run top -c i get

15001 qi34      20   0 1681144 133824  11896 S  63.0  1.7   0:29.43         /usr/bin/java -Djdk.home= -Djruby.home=/home/qi34/.rvm/rubies/jruby-1.7.16 + 
15013 qi34      20   0 1681144 133288  11892 S  60.4  1.6   0:29.21         /usr/bin/java -Djdk.home= -Djruby.home=/home/qi34/.rvm/rubies/jruby-1.7.16 + 
15087 qi34      20   0 1681144 124008  11936 S  57.7  1.5   0:28.88         /usr/bin/java -Djdk.home= -Djruby.home=/home/qi34/.rvm/rubies/jruby-1.7.16 + 
14290 qi34      20   0 2632636 381032  13040 S  53.7  4.7   1:05.42         /usr/bin/java -Djdk.home= -Djruby.home=/home/qi34/.rvm/rubies/jruby-1.7.16 + 
14349 qi34      20   0 2632636 374516  13052 S  53.4  4.6   1:05.22         /usr/bin/java -Djdk.home= -Djruby.home=/home/qi34/.rvm/rubies/jruby-1.7.16 + 
14348 qi34      20   0 2632636 377124  13048 S  53.1  4.7   1:03.12         /usr/bin/java -Djdk.home= -Djruby.home=/home/qi34/.rvm/rubies/jruby-1.7.16 + 

This process takes utilize more memory.I run killall java but doesn't solve my problem. Please suggest.

Answer 1

Try this command to get all the Java processes

ps -aux |grep java| cut -c10-15

and then kill them using

kill -9 process id from the above command

Now find out what is the culprit program. Before installing anything - try to go thru the release notes. You need to uninstall it and also delete the directories created by this culprit program. If you can provide more details about this program then specific answer can be provided.

Answer 2

Have you tried the pkill option? pkill will send the specified signal (by default SIGTERM) to each process instead of listing them on stdout and will instantly kill any process matching the specified process name unless the process is performing a syscall. Here, try this

pkill -9 java

Will attempt to instantly shutdow all processes with the name matching java then you can check again like this

ps aux | grep java

Let me know how it goes.!

Answer 3

Its my fault the above process running because of cron jobs.In my rails application I have run cron jobs, thats why the process are creating.