[SOLVED] crontab -e not running @reboot script

suicidaleggroll · 04-28-2014, 03:05 PM

Something is not right and sudo/root is not the answer. My guess is that cron's @reboot directive is running too early in the boot process before /var/run/screen has been prepared.

See:
https://bugs.launchpad.net/ubuntu/+s...en/+bug/574773

edit: lol - we found the same bug report at the same time

As a test, you could try putting a delay in there, something like

Code:

@reboot wait 60; sh /home/steve/craftbukkit.sh > /home/steve/craftbukkit.out 2>&1

If it works, you know that's the problem.

EODSteven · 04-28-2014, 03:09 PM

If that works then thats the answer!...I'll try it!

suicidaleggroll · 04-28-2014, 03:13 PM

Sorry, typo, that should have been sleep, not wait (getting my delay routines mixed up)

Code:

@reboot sleep 60; sh /home/steve/craftbukkit.sh > /home/steve/craftbukkit.out 2>&1

This will pause for a minute before running the script. So make sure you wait ample time before checking if the screen is there.

schneidz · 04-28-2014, 03:14 PM

Quote:

Originally Posted by suicidaleggroll

Something is not right and sudo/root is not the answer. My guess is that cron's @reboot directive is running too early in the boot process before /var/run/screen has been prepared.

See:
https://bugs.launchpad.net/ubuntu/+s...en/+bug/574773

edit: lol - we found the same bug report at the same time

As a test, you could try putting a delay in there, something like

Code:

@reboot wait 60; sh /home/steve/craftbukkit.sh > /home/steve/craftbukkit.out 2>&1

If it works, you know that's the problem.

should be sleep 60 ? i dont have much experience with screen but i'm guessing it shouldnt/cant be used without a proper login ?

EODSteven · 04-28-2014, 03:26 PM

Wait a second.....The script file is the one creating the screen and no, wait 60 didn't work I'll try sleep.

suicidaleggroll · 04-28-2014, 03:28 PM

Quote:

Originally Posted by schneidz

i dont have much experience with screen but i'm guessing it shouldnt/cant be used without a proper login ?

You may be right, I don't have a lot of experience with screen either.

EODSteven · 04-28-2014, 03:35 PM

@Sucide Have some faith...It worked perfectly!
Final edit and logs for anyone looking at same solution:

crontab -e

Code:

@reboot sleep 60; bash craftbukkit.sh >> /home/steve/craftbukkit.out 2>&1

Script file in my home directory:

Code:

#!/bin/bash
 BINDIR=$(dirname "$(readlink -fn "$0")")
 cd "$BINDIR"
 cd /home/steve/craftbukkit/
 screen -dmS craftbukkit java -server -Xmx5120M -Xms5120M -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+AggressiveOpts -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -Xnoclassgc -XX:UseSSE=3 -XX:LargePageSizeInBytes=4m -jar craftbukkit.jar -o true

Then everytime the computer gets rebooted due to a power failure, your gameserver will restart automatically!

...or you could go buy a $5,000 UPS