Kudos @damrose
Problem:
With UCS 4.4 the Join Script “30univention-appcenter” fails.
Solution
Step 1:
Check your logfile /var/log/univention/join.log for entries like this:
Waiting for activation of the extension object app_syntax:...................................................ERROR: Master did not mark the extension object active within 180 seconds.
ERROR
ucs_registerLDAPExtension: registraton of /usr/share/univention-appcenter/app_syntax.py failed.
EXITCODE=1
Step 2:
Check the logfile /var/log/univention/listener.log on the Primary Directory Node for errors.
Step 3:
Check if the object exists and is deactivated:
root@master:~# udm settings/udm_syntax list
DN: cn=app_syntax,cn=udm_syntax,cn=univention,dc=multi,dc=ucs
active: FALSE
[...]
filename: app_syntax.py
name: app_syntax
package: univention-appcenter
[...]
Please note the DN here as we will need it in the next step: cn=app_syntax,cn=udm_syntax,cn=univention,dc=multi,dc=ucs
Optional step:
You might try to simply activate the module but it might not be enough. In case it does not work, proceed with the next step.
udm settings/udm_syntax modify --dn="cn=app_syntax,cn=udm_syntax,cn=univention,dc=multi,dc=ucs" --set active=TRUE
Step 4:
Remove the object as a simple activation is not sufficient.
udm settings/udm_syntax remove --dn="cn=app_syntax,cn=udm_syntax,cn=univention,dc=multi,dc=ucs"
Step 5:
Re-run the join script
univention-run-join-scripts
Step 6 (if it still fails):
There might be an issue with your replication. Do:
root@ucs01:~# univention-directory-listener-ctrl status
Listener status:
finish: univention-directory-listener: (pid 7920) 6s, normally down
Current Notifier ID on "ucs01.multi.ucs"
2525
Last Notifier ID processed by local Listener:
2212
Last transaction processed:
2525 cn=app_syntax,cn=udm_syntax,cn=univention,dc=multi,dc=ucs a
Modules:
[...]
You see a mismatch between the two IDs (2212 on Listener vs. 2525 on Notifier).
Go ahead troubleshooting with the help of these articles.