Shell Programming and Scripting

Code:

$ echo $error | sed "s/.*\.\([^:]*\).*/\1/"
OutOfMemoryError

If you know that you expect an OutOfMemory error, why do you need to extract it?

Hello scottn,

Actually I was having requirement to grep for latest outofmemory message from the logs and send an lert if it is there. The code which i was using it tail 10 lines of logs and grep outofmemory message and sends alert. But this code is not perfect as if logs are not updated then it will grep for old message and still sneds an alert. Is it possible for you to help me design script which will grep for outofmmeory message from logs and send alert only when it is latest.

Thanks in advance.

---------- Post updated at 09:08 AM ---------- Previous update was at 08:23 AM ----------

Hello scottn,

My requirement is to grep for latest outofmemory error messages from the logs and should send an alert if there is any outofmemory error in the logs.

I think I know what your requirement is. Bumping your post is more likely to get you a PM than a solution!

If you want to send "alerts" for new occurrences of the error, then you need a point of reference, most likely using the timestamps in the input file.

Not very elegant, and I'm sure someone (please!) will improve on it:

Code:

#Some variables
D=/tmp             # Change this if you want
F=$D/.latest       # Timestamp of last-found error
L=$F.log           # Text to mail at the end, if any
INFILE=file1       # The input file where to find OutOfMemory errors

rm -f $L

N=$(date '+%y%m%d%H5M%S')

[ ! -f $F ] && echo $N > $F || N=$(cat $F)

awk -F"[: /\[]" '/OutOfMemory/ && $4*1$2$3$5$6$7 > N {
 N = $4$2$3$5$6$7; print > L
}
END {
  print N > F
}
' N=$N F=$F L=$L $INFILE

[ -f $L ] && uuencode $L $L.txt | mailx -s "OutOfMemory alert" some.one@some.where

Hello scottn,

Thanks for the script. Is it possible to know if script is grepping for latest outofmemory error messages and not sending old messages. Also if there is not latest outofmemory message then it should write in some file that there is no latest outofmemory message in the logs.I really appreciate your help.