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1. Login to your central site as the site user

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   language bash theme RDark
   root@linux:~# omd su mysite

   
   

2. Check to see if you have old directories within $OMD_ROOT/tmp/check_mk/wato/activation/
   

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   language bash theme RDark
   OMD[mysite]:~$ cd ls -lah $OMD_ROOT/tmp/check_mk/wato/activation/ OMD[mysite]:~$ ls -lah total 042 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.

   
   
   

3. Remove the lingering directory and try to activate the changes again:

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   language bash theme RDark
   OMD[mysite]:~$ rm -r $OMD_ROOT/tmp/check_mk/wato/activation/263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/

   
   

4. There will be a corresponding background job in $OMD_ROOT/var/check_mk/background_jobs/, which can be cleaned up as well:

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   language bash theme RDark
   drwxrwxOMD[mysite]:~$ ls -lah $OMD_ROOT/var/check_mk/background_jobs/ total 42 drwx------ 2 hyde hyde 4.0K Jul 4 00:42 activate-changes-scheduler-0897307d-d177-4b6e-a500-1263a5ec3299/ drwx------ 2 hyde hyde 4.0K Jul 4 00:42 activate-changes-scheduler-1ba662c2-374a-4bce-9b6a-59329e9f11a5/ drwx------ 32 mysitehyde mysitehyde 9204.0K JanJul 3 18:34 e55a7651-40ce-40da-b11f-880d0778481f/
   Code Block
   language bash theme RDark
   activate-changes-scheduler-263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/ OMD[mysite]:~$ rm -R e55a7651-40ce-40da-b11f-880d0778481f/$OMD_ROOT/var/check_mk/background_jobs/activate-changes-scheduler-263383ff-b58b-4a8e-ba77-c6e1ff2d3b94/

   
   

5. Now go back to the UI and try to activate changes.

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