UNIX for Dummies Questions & Answers

Hi!

Well, you could try it yourself. Anyway, to get a spesific message you simply assign the message to the corresponding index of the array:
/Match_1/ { arr[$0] = "We got match_1" }

and in the END section:
for (f in arr) printf "%s\n", arr[f]

BR,

pen

great reply pen.

I also thought a way after using my little brain. Could you please check this, i am working in both way to find out what is minimal resource usage scripts.

tail -n 2000 $TRACE | awk '
/TimeOutException/ { printf ("%s%s", "'"`email "TimeOutException" "$2"`"'")}

In our log file we get the time stamp at the second position.

and the function is

email()
{
echo "$1 occured at $2" | mail -s "Error!! $SERVER is thrown $1 - [$MYDATE]@[$MYTIME]" $mailid
}

waiting for your reply.

thanks
senthilkumar

If the need is to be alerted whenever an exection is found in a log and many exeption need to be monitored I sugess you use WOTS.
It's a perl daemon that is made for that purpose. Alert doesn't have to be launch by cron anymore, you'll be alerted right away ...
you can find wots and learn more about it there:
Perl Tools for download

- Laurent

Hi!

Forking every time a match has ben found is not really the answer... Anyway, I'd go on with Laurent's suggestion (thanks, Laurent!) and use a ready script. Sometimes it is better to use a ready wheel than re-invent one :-)

pen

Hi Pen,

I tried to implement the Lauren way but failed as we cant install any perl package in the machine, so we need to go for shell script.

Also could you please let me know the calling email program inside the awk is correct logic, becuase i am getting alret even thou there is no error meesage and its not taking the second arugumnet "$2" value.

Thanks
senthilkumar

Hi senthilkumar,

Which OS are you running ?

senthilkumar,

The main problem I see using a tail is that if you had more then 2000 lines added to the log you will possibly miss an exception.

You could
Step 1- grep for the exception, output the result to a /tmp/search.0 file
Step 2 - if /tmp/search.old exist do a diff with /tmp/search.0 and mail the result
step 3 - renaim /tmp/search.0 /tmp/search.old

unless the log file is very large, (then you might rotate the log more often).

Still I think using wots would be better and you might find more usage to it, like alert you on software or hardware errors ...

- Laurent