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As you verified in the section above, there are lingering files within the central site's ~/tmp/check_mk/wato/activation/ directory.
- A reboot of your Checkmk servers server's operating system will clear out these files and should allow you to activate changes again.
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Login to your central site as the site user
Code Block language bash theme RDark root@linux:~# omd su mysite
.Check to see if you have old directories within $OMD_ROOT/tmp/check_mk/wato/activation/
Code Block language bash theme RDark OMD[mysite]:~$ ls -lah $OMD_ROOT/tmp/check_mk/wato/activation/ total 42 drwxrwx--- 3 mysite mysite 100 Jul 4 00:42 6ecd4860-611e-4a4c-912f-74a6f1123e99/ drwxrwx--- 3 mysite mysite 100 Jul 4 00:42 bec06bbc-1d35-4668-a421-151828b8500d/ drwxrwx--- 3 mysite mysite 920 Jul 3 18:34 263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/
It looks like there is one old directory that couldn't be deleted. The files here are deleted every minute by default.
.Remove the lingering directory:
Code Block language bash theme RDark OMD[mysite]:~$ rm -r $OMD_ROOT/tmp/check_mk/wato/activation/263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/
.There will be a corresponding background job in $OMD_ROOT/var/check_mk/background_jobs/, which can be cleaned up as well:
Code Block language bash theme RDark OMD[mysite]:~$ ls -lah $OMD_ROOT/var/check_mk/background_jobs/ total 42 drwx------ 2 hyde hyde 4.0K Jul 4 00:42 activate-changes-scheduler-0897307d-d177-4b6e-a500-1263a5ec3299/ drwx------ 2 hyde hyde 4.0K Jul 4 00:42 activate-changes-scheduler-1ba662c2-374a-4bce-9b6a-59329e9f11a5/ drwx------ 2 hyde hyde 4.0K Jul 3 18:34 activate-changes-scheduler-263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/ OMD[mysite]:~$ rm -R $OMD_ROOT/var/check_mk/background_jobs/activate-changes-scheduler-263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/
.- Now go back to the UI and try to activate changes.
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