NAS 网桥从 2.2.1 升级到 2.3.1 失败

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适用场景

NAS Bridge 2.3.1
NAS 网桥 11.4.

问题描述

NAS 网桥从 2.2.1 升级到 2.3.1 或从 2.3.1 升级到 11.4 可能会失败，并且日志显示以下错误：

Installation finished. No error reported.
 [Task]
 Preparing data
 Flushing mysql host cache
 Flushing mysql thread cache
 Flushing mysql tables
 Clean shutdown in progress - purging all
 data, please don't interrupt
 Shutdown signal sent to server;  Waiting for pid file to disappear
 Mysql shutdown complete
 Starting
 mysql again
 Verifying mysqld service, will take upto 2 minutes
 mysqladmin: connect to server at 'localhost' failed
 error: 'Can't
 connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111 "Connection refused")'
 Check that mysqld is running
 and that the socket: '/var/run/mysqld/mysqld.sock' exists!
 Mysqld is down, restarting in 5s
 mysqld is alive
 Mysqld is unstable,
 failing upgrade
 ERROR: Failed flushing database