Hi Akanksha, in your logs I see mysqld is running as pid 9221 Job for mysql.service failed because the control process exited with error code. See "systemctl status mysql.service" and "journalctl -xe" for details.
Which implies it failed to start/restart on an upgrae,. When looking for errors I found: 2021-05-16T07:06:41.654237Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel. 2021-05-16T07:06:41.657827Z 0 [ERROR] [MY-010273] [Server] Could not create unix socket lock file /opt/lampp/var/mysql/mysql.sock.lock. 2021-05-16T07:06:41.658385Z 0 [ERROR] [MY-010268] [Server] Unable to setup unix socket lock file. Which shows us what failed and made me suspicious as this is an uncommon path that was used. With that in mind I found [ 1737.039283] audit: type=1400 audit(1621080213.808:139): apparmor="DENIED" operation="mknod" profile="/usr/sbin/mysqld" name="/opt/lampp/var/mysql/mysql.sock.lock" pid=10896 comm="mysqld" requested_mask="c" denied_mask="c" fsuid=126 ouid=126 And now things made sense, if you configure "too far away" from the default config you have to modify the apparmor profile as well to allow that. By default apparmor tries to isolate the mysqld process to protect your system and in this case the new path that you have configured is blocked by that isolation. If you have changed that (either allowed the path or configured it to a common one that is allowed by default) the upgrade will likely work again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928569 Title: package mysql-server-8.0 8.0.25-0ubuntu0.20.04.1 failed to install/upgrade: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-8.0/+bug/1928569/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
