Shell script to get Email Notification for every new occurence of java.lang.OutOfMemoryError in logs

Shell script to get Email Notification for every new occurrence of java.lang.OutOfMemoryError in logs

This script will send the Email Notification whenever there is new occurrence of java.lang.OutOfMemoryError in logs with latest Timestamp that will help you in diagnosing the issue.

Benefit: This script is helpful in monitoring the Environment and will let the administrator know about the issue ASAP so that he can perform the required solution and can prevent unbearable delay.As it sends the notification it also takes the backup of log file.

Below are steps you need to follow:

Step 1) Create the directory

cd /shared/fmw/build/myscript

Step 2) Create AutocheckOOM.sh file in the current directory with below content:

#!/bin/bash
##########
ENVNAME="Env:"
COUNTER="0"
WORKDIR="/shared/fmw/build/myscript"
msName="MngdSvr1"
Log_LOC="logfile_location"

LogFiles=( MngdSvr1.log )

# email notifications will be sent via mail
EMAIL="mail_id"
# CC list in the notification mail
CCList="ccmail_id"
# From email address in the notification Email
FromAdd="frommail_id"



#Functions

OOM() {
for logfile in ${LogFiles[@]} ;do
Count=`grep "java.lang.OutOfMemoryError" $Log_LOC/$logfile | wc -l`
COUNTER=$[$COUNTER + $Count]
export COUNTER
done
}


BackupLogs() {
for logfile in ${LogFiles[@]} ;do
if [ -f $Log_LOC/$logfile ]; then
tar -czf $Log_LOC/$logfile.tar.gz $Log_LOC/$logfile
fi
done
}

Main() {
OOM
#ProcCheck
if [[ "$COUNTER" != "0" ]] ; then
echo "`date` :Out Of Memory Condition Detected.."
echo "`date` :Backing up logs for future reference.."
BackupLogs
cat $Log_LOC/NGS_MngdSvr1.log | grep java.lang.OutOfMemoryError | grep "####<" > temp.txt
output=$(tail -1 temp.txt | awk -F'>' '{print $1}' | awk -F'<' '{print $2}')
echo ''>> a.txt
test=$(cat a.txt | grep "$output")
if [ "$test" == "" ]; then
echo $output >> a.txt
#echo $output
echo "$ENVNAME OutOfMemory Error Detected at $output" | mail -s "$(echo -e "Auto-Msg: $ENVNAME : OutOfMemory Error\nContent-Type: text/html")" $EMAIL $CCList
 $FromAdd
fi
#CleanLogs

else
echo "`date` :Exiting, No Out of Memory found...";
exit 0
fi
}
Main

Note : change the location of log according to your Env.
           change the email_id accordingly.
          change the name of managed server accordingly

After this you just need to run the shell script or better way is to set this as a job in cron.

sh AutocheckOOM.sh

Thanks a lot for your patience!!!!

Regards
-Ashish