script to check for old java processes

[mmcds]

I am running on SuSE Linux and I am trying to find a way how I can find any process that is older than 1 day/24 hours and kill it via a script that I will put in cron to run once a day or so. These are WebSphere/Java processes the get hung from time to time due to programming issues or whatever the case may be. Any suggestions would be greatly appreciated.

 

[macd68]

man pgrep?

 

[columb]

If you look at the output from ps -ef you'll see that older processes have their timestamp in the format 'Mon dd', eg 'Nov 12' whereas the newer processes have their timestamp in the format 'hh:mm', eg 16:03.

So you want an awk statement which will filter out all the java processes which have their timestamp in the format [A-Z][a-z][a-z][0-9][0-9] - somthing like

ps -ef | awk '$5 ~ /[A-Z][a-z][a-z][0-9][0-9]/ && /java/ {print}'

Once you are convinced that the expression will ONLY return old processes then you can refine it to print only the PID

ps -ef | awk '$5 ~ /[A-Z][a-z][a-z][0-9][0-9]/ && /java/ {print $2}'

and, as long as you're convinced that works, pipe it into xargs with

ps -ef | awk '$5 ~ /[A-Z][a-z][a-z][0-9][0-9]/ && /java/ {print $2}'| xargs kill

Remember, test, test, and test again!

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Columb Healy

 

[mmcds]

Thanks for the suggestions. That worked great.