I am facing a problem where i have to restart zmmailboxdctl every after some time when zimbra mailbox not responds.
Whenever zimbra not responds, i could not able to access webclient but i checked the zmcontrol status and found every services are running fine. But still webclient not working also the admin interface. I don't know what is wrong with the zimbra system and randamly every after 2 to 3 days i am facing this issue. I have checked the mailboxd.log and other log files but i have not found any suspected error.

My Server details are - Ubuntu 10 Server with
Zimbra 7.1.3

Somebody please respond with solution.