Critical erros in log file after upgrade

[lfasci]

In two different upgrades I find critical error in the /var/log/zimbra.log file. The system is up and running but the error comes out every few minutes.
Please, can you say me the output of the following command on your server:
cat /var/log/zimbra.log | grep CRITICAL

Thank you

[phoenix]

This should be in it's own thread not in the 'Success Stories' forum and not hijacking another thread, I'll move it.

In two different upgrades I find critical error in the /var/log/zimbra.log file. The system is up and running but the error comes out every few minutes.

Wouldn't it be an idea to tell us what the error is and which version and release of Zimbra you're using?

Please, can you say me the output of the following command on your server:

There is no output on any of my servers.

[mavlenko]

I have no output on any of my servers too.
Can you show as your output?