Sudden error of Zimbra and Mysql server. What to do?

Question

MySQL

Guys, good afternoon, the situation may be banal, but at the same time I don’t know the answer to it ... There is a mail server on ubuntu server 14.04, it has Zimbra Collaboration 8.7.11 GA Release Open Source Edition.
When trying to start Zimbra services, it says Can't kill a non-numeric process ID at /opt/zimbra/bin/zmstatctl line 204, mysql server does not start, then some services, respectively, too, in general 50 to 50. Hard disk (virtual) 500GB is 70% full, everything seems to work, but it doesn't)
Naturally, there are no backups))))) I inherited just a week ago, where to dig, can I somehow check the integrity of the database or at least catch the error in more detail?

Answer 1

Zimbra must be run from under the Zimbra user. Su zimbra or sudo su zimbra and then start. About mysql it is not entirely clear what error it has?

Answer 2

check logs and dmesg

Answer 3

Look at the /opt/zimbra/log/*.pid files.
They may have been left behind after an unexpected server restart.
If the corresponding processes are not alive, the *.pid files must be deleted.