How to check if a process is still outputting or hung

Question

I'm using some casperjs scripts (which I don't really understand) with a known issue that the process hangs after a specific warning message. Otherwise it's outputting a log message every few seconds.

I need to restart the process when it hangs.

So can I make a script which checks if a log file is getting bigger at each time interval? Or can I intercept the console output of a process and check if the last message is the same as the specific warning message?

Any help will be appreciated, thanks!

It seems like it'd be better to fix the hanging (if possible) — BobTuckerman, Aug 02 '16 at 22:37

score 0 · Accepted Answer · answered Aug 02 '16 at 16:55

#!/bin/sh
LOGFILE="/path/to/logfile/"
CURRENT_SIZE=`stat --format "%s" $LOGFILE`
while true; do
    LAST_SIZE=$CURRENT_SIZE
    sleep 10
    CURRENT_SIZE=`stat --format "%s" $LOGFILE`
    if [[ $CURRENT_SIZE -eq $LAST_SIZE ]]; then
            echo "Restarting process"
            #do whatever you need to restart process...
            sleep 5
            CURRENT_SIZE=`stat --format "%s" $LOGFILE`
    fi
done

How to check if a process is still outputting or hung

1 Answers1