Unmounting optimumcache takes too long
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  1. Havri
  2. 02.12.2016
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Every time I want to reboot a machine that has optimumcache installed and running, it takes way too long. I keep getting errors that the ploop device cannot unmount.

Can anyone suggest a workaround to forcefully unmount the ploop device for optimumcache and then reboot?
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  1. 09.12.2016 04:12:00
  2. # 1
Havri Accepted Answer
Posts: 26
Joined: 30.07.2015

I've updated recently the kernel but the one that I was using a few days ago was a previous version:

[email protected] [~]# uname -r

The version of optimumcache was installed a while back using the beta version. I installed it using the updates testing repo from Cloudlinux:

yum install optimumcache --enablerepo=cloudlinux-updates-testing

[email protected] [~]# rpm -q optimumcache

The errors found in /var/log/messages while trying to reboot are:

Dec  7 22:30:27 myserver kernel: [17457750.246210] stop ploop34233 failed (holders=1)
Dec  7 22:30:28 myserver kernel: [17457751.246698] stop ploop34233 failed (holders=1)
Dec  7 22:30:29 myserver kernel: [17457752.247184] stop ploop34233 failed (holders=1)

Like in my previous post, the most that I have waited was about 5 minutes before forcefully rebooting the server.
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