package mysql-server-8.0 8.0.23-0ubuntu0.20.04.1 failed to install/upgrade: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1

[AhmedFaisal]

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Processing triggers for systemd (245.4-4ubuntu3.6) ...
No apport report written because the error message indicates its a followup error from a previous failure.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: mysql-server-8.0 8.0.23-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-50-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat Apr 24 20:06:47 2021
ErrorMessage: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2021-04-20 (3 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLVarLibDirListing: ['binlog.index', 'ib_logfile1', 'server-key.pem', 'ib_buffer_pool', 'undo_001', 'binlog.000002', 'mysql', 'ibdata1', 'mysql.ibd', '#innodb_temp', 'debian-5.7.flag', '#ib_16384_1.dblwr', 'ib_logfile0', 'performance_schema', 'client-key.pem', 'server-cert.pem', 'client-cert.pem', 'private_key.pem', 'undo_002', 'binlog.000001', 'ca.pem', 'auto.cnf', 'ca-key.pem', '#ib_16384_0.dblwr', 'sys', 'public_key.pem']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-5.8.0-50-generic root=UUID=c80ac18b-1bfa-4298-9cb2-a97ffbe90784 ro quiet splash vt.handoff=7
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.5
SourcePackage: mysql-8.0
Title: package mysql-server-8.0 8.0.23-0ubuntu0.20.04.1 failed to install/upgrade: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Lucas Kanashiro (lucaskanashiro)]

Thank you for taking the time to file a bug report.

I found the following in the log:

2021-04-24T15:06:45.359221Z 0 [ERROR] [MY-010262] [Server] Can't start server: Bind on TCP/IP port: Address already in use
2021-04-24T15:06:45.359439Z 0 [ERROR] [MY-010257] [Server] Do you already have another mysqld server running on port: 3306 ?
2021-04-24T15:06:45.359880Z 0 [ERROR] [MY-010119] [Server] Aborting

A process was already running and using the default mysql port, that's why the installation failed. Could you check if you were already running a mysql instance before you installed it?

Since it seems likely to me that this is a local configuration problem,
rather than a bug in Ubuntu, I am marking this bug as 'Incomplete'.

However, if you believe that this is really a bug in Ubuntu, then we would
be grateful if you would provide a more complete description of the problem
with steps to reproduce, explain why you believe this is a bug in Ubuntu
rather than a problem specific to your system, and then change the bug
status back to "New".

For local configuration issues, you can find assistance here:
http://www.ubuntu.com/support/community

[Launchpad Janitor (janitor)]

[Expired for mysql-8.0 (Ubuntu) because there has been no activity for 60 days.]