Hi,
in your log I see:
mysqld will log errors to /var/log/mysql/error.log
mysqld is running as pid 4175
Error: Unable to shut down server with process id 4175
That belongs to this update:
Start-Date: 2020-07-29 00:23:19
Commandline: aptdaemon role='role-commit-packages' sender=':1.117'
Upgrade: mysql-client-8.0:amd64 (8.0.20-0ubuntu0.20.04.1,
8.0.21-0ubuntu0.20.04.3), mysql-server:amd64 (8.0.20-0ubuntu0.20.04.1,
8.0.21-0ubuntu0.20.04.3), mysql-server-8.0:amd64 (8.0.20-0ubuntu0.20.04.1,
8.0.21-0ubuntu0.20.04.3), mysql-client-core-8.0:amd64 (8.0.20-0ubuntu0.20.04.1,
8.0.21-0ubuntu0.20.04.3), libmysqlclient21:amd64 (8.0.20-0ubuntu0.20.04.1,
8.0.21-0ubuntu0.20.04.3), mysql-server-core-8.0:amd64 (8.0.20-0ubuntu0.20.04.1,
8.0.21-0ubuntu0.20.04.3)
But your attached eroor.log (notice that the error points you to that log as
well) only does until:
2020-07-28T19:26:39.241459Z 0 [System] [MY-013602] [Server] Channel mysql_main
configured to support TLS. Encrypted connections are now supported for this
channel.
2020-07-28T19:26:39.569941Z 0 [Warning] [MY-011810] [Server] Insecure
configuration for --pid-file: Location '/tmp' in the path is accessible to all
OS users. Consider choosing a different directory.
2020-07-28T19:26:39.935282Z 7 [System] [MY-013172] [Server] Received SHUTDOWN
from user boot. Shutting down mysqld (Version: 8.0.21-0ubuntu0.20.04.3).
2020-07-28T19:26:41.659898Z 0 [Warning] [MY-011068] [Server] The syntax
'validate password plugin' is deprecated and will be removed in a future
release. Please use validate_password component instead.
2020-07-28T19:27:12.537170Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld:
Shutdown complete (mysqld 8.0.21-0ubuntu0.20.04.3) (Ubuntu).
2020-07-28T19:27:14.747517Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld
(mysqld 8.0.21-0ubuntu0.20.04.3) starting as process 7712
2020-07-28T19:27:14.797070Z 1 [System] [MY-013576] [InnoDB] InnoDB
initialization has started.
2020-07-28T19:27:18.755880Z 1 [System] [MY-013577] [InnoDB] InnoDB
initialization has ended.
2020-07-28T19:27:19.036929Z 0 [System] [MY-011323] [Server] X Plugin ready for
connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2020-07-28T19:27:19.038011Z 0 [Warning] [MY-013129] [Server] A message intended
for a client cannot be sent there as no client-session is attached. Therefore,
we're sending the information to the error-log instead: MY-001287 - 'validate
password plugin' is deprecated and will be removed in a future release. Please
use validate_password component instead
2020-07-28T19:27:20.876639Z 0 [Warning] [MY-010068] [Server] CA certificate
ca.pem is self signed.
2020-07-28T19:27:20.877234Z 0 [System] [MY-013602] [Server] Channel mysql_main
configured to support TLS. Encrypted connections are now supported for this
channel.
2020-07-28T19:27:20.901729Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld:
ready for connections. Version: '8.0.21-0ubuntu0.20.04.3' socket:
'/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu).
There I see one good shutdown and a startup.
The PID "4175" as listed by the error isn't there yet.
SO you seem to have an outdated error log on that bug, which means no one can
spot whatever happened on that server shutdown.
In general I have to admit that 90% of these issues are local
configuration issues and the remaining 10% are racy and work fine on a
retry.
Therefore I'd ask you to check the log on your system and retry.
If you truly believe this is a bug in the Ubuntu Package set the bug back to
new and provide additional logs and details why you think so.
** Changed in: mysql-8.0 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1889299
Title:
package mysql-server-8.0 8.0.21-0ubuntu0.20.04.3 failed to
install/upgrade: installed mysql-server-8.0 package post-installation
script subprocess returned error exit status 1
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