Help with kill a specific process after certain running time

Shell Programming and Scripting
1

Hi,

Do anybody experience to write a bash script in order to kill a specific process (java) after certain time of running?

eg.

java java.jar task_run.txt

I will run a java program (java.jar) which will run a long list of process (task_run.txt) one by one.
I plan to terminate the java program if it is running a specific task more than 1 minute times.
Thus the java program can continue to run other task instead of stuck at particular process which taken long time.

Thanks for any advice.

2 
# background process
java java.jar task_run.txt > /dev/null 2>&1   &
# take bg process id
PID=$!
# wait 60 s
sleep 60
# you can kill the process - if it's already stopped, then no problem
# send default signal TERM to the java process, it if's still working 
# = java can handle signal
kill $PID 2>/dev/null
sleep 2
# still process ? use signal KILL = and I mean it
kill -KILL $PID  2>/dev/null
3

Hi,

Thanks for advice.
I will have a try on it.
I just google and it shown that ulimit -t able to do similar task too?
But I just not sure how to specific only automatic kill the java program.
I got run few thing at the same time.
But I just wanna kill if a java process run more than 30 seconds.

Thanks a lot.

---------- Post updated at 10:47 AM ---------- Previous update was at 10:26 AM ----------

I was thinking to write a bash script with able to print out all my java program pid all the time and it only kill the java running if it was running more than 10 seconds.

4

Maybe something like following:

 
while sleep 10; do
  ps ax | grep "task_run.txt" | grep -v "grep" > line.txt
  if [ ! -s line.txt ]; then continue; fi
  minutes=`cat line.txt | cut -c 23 -d " "`
  pid=`cat line.txt | cut -f 1`
  if [ $minutes -gt 0 ]; then
    kill -9 $pid
    echo killed $pid
  fi
done

The "minutes" may be a little weak if the process continues to run but does not use cpu cycles. I think ps can be customized to display user time, if needed.

1 Like
5

Hi,

I need to monitor the file creation in some directory and i came to know that it can be achieved using ionotifywait tool but this is not available in Redhat 5.6

Do you have any idea wthether i can monitor the file without using inotifywait tool? Any other way to monitor the file creation file?

-Pawan

7

It is rude and inconsiderate to hijack another person's thread. You should start your own. Otherwise, confusion may ensue regarding to which problem a response pertains, particularly if the response doesn't quote an earlier post.

I encourage others to not respond to hijacks.

Regards,
Alister