Upgrade restart failure: Got notification message from PID 4384, but reception only permitted for main PID 4382 (exceeded timeout?)

[mridul ahuja]

Happened when the laptop booted

OS:

Description: Ubuntu 20.04.2 LTS
Release: 20.04

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: mysql-server-8.0 8.0.25-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106
Uname: Linux 5.4.0-73-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.17
Architecture: amd64
CasperMD5CheckResult: skip
Date: Mon May 24 20:00:37 2021
ErrorMessage: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2021-04-09 (45 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
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
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-5.4.0-73-generic root=UUID=4540f670-d768-49e8-83dd-2b22d58213b3 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 8.0.25-0ubuntu0.20.04.1 failed to install/upgrade: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to focal on 2021-04-09 (45 days ago)
modified.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: [modified]
mtime.conffile..etc.mysql.mysql.conf.d.mysqld.cnf: 2021-05-19T19:33:59.462981

[Bryce Harrington (bryce)]

2021-05-24T14:27:27.323396Z 7 [System] [MY-013172] [Server] Received SHUTDOWN from user boot. Shutting down mysqld (Version: 8.0.25-0ubuntu0.20.04.1).
2021-05-24T14:27:28.699716Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.25-0ubuntu0.20.04.1) (Ubuntu).

Offhand, this looks like another of the recent spate of "shutdown during restart took longer over a minute to complete when it usually only takes a few seconds" bug reports, however the error messages for this one are notably different. (I.e. the pid's don't quite match up, and there's a systemd status in the terminal log.)