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You may face ones of these problems while activating changes. The exact error message might look different, but this article might still apply.

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One of these error messages might apply to you:

Got invalid data:

Internal automation error: Error running automation call restart (exit code 1), error:

An error occurred: Other restart currently in progress. Aborting

Traceback (most recent call last):
File "/omd/sites/mysite/lib/python3/cmk/gui/wato/pages/automation.py", line 231, in
_execute_automation_command
response.set_data(repr(automation.execute(automation.get_request())))

File "/omd/sites/mysite/lib/python3/cmk/gui/wato/pages/activate_changes.py", line 1034, in
execute
return activate_changes.execute_activate_changes(


File "/omd/sites/mysite/lib/python3/cmk/gui/watolib/activate_changes.py", line 2128. in
execute_activate_changes

warnings - get_config_domain(domain_request name)().activate(domain_request.settings)

File "/omd/sites/mysite/lib/python3/cmk/gui/watolib/config_domains.py", line 76, in activate
return ("restart": restart, "reload": reload,)[

File "/omd/sites/mysite/lib/python3/cmk/gui/watolib/check_mk_automations.py*. line 275, in
restart
automation_serialized("restart", args=hosts_to_update)

File "/omd/sites/mysite/lib/python3/cmk/gui/watolib/check_mk_automations.py", line 53. in automation_serialized
cmdline, serialized_result check_mk_local_automation_serialized(

File "/omd/sites/mysite/lib/python3/cmk/gui/watolib/automations.py". line 148. 
Internal automation errorin check_mk_local_automation_serialized raise local_automation_failure(
cmk.gui.watolib.automations.MKAutomationException: Error running automation call restart (exit
code 1), error:

An error occurred: Other restart currently in progress. Aborting.

, Aborting

The site is currently locked by another activation process. 

Please try again later.

Verification

1. Log into your central Checkmk site as an administrative user and navigate to Background jobs.
   
   
2. Check the section titles Activate Changes Scheduler for running jobs, which are older than a few minutes.
   
   
3. Take note of the UUID at the end of the job name (activate-changes-scheduler-263383ff-b58b-4a8e-ba77-c6e1ff2d3b94).

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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. 

1. 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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1. Login to your central site as the site user

   Code Block
   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/
   

   Code Block
   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:

   Code Block
   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:

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