Applicable to:
- Plesk for Linux
Symptoms
-
Plesk upgrade hangs on the following step:
PLESK_INFO: Setting up plesk-dovecot-imap-driver
-
It is not possible to switch from Courier to Dovecot via Plesk Installer.
-
The server has a kernel version older than 4.4.0-66-generic:
# uname -r
4.4.0-31-generic -
AppArmor is enabled on the server:
# apparmor_status
apparmor module is loaded.
Cause
This is an Ubuntu bug, which may occur when a server has an old kernel and AppArmor is enabled.
Resolution
Either upgrade kernel to the version at least 4.4.0-66-generic or temporary disable AppArmor and perform a Plesk upgrade/installation of Dovecot.
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