I'm in process of upgrading a master server from 4.0.24-log to 5.0.22-log in a single master-slave environment. I've previously upgraded the slave to 5.0.22-log and restarted replication without issue.
The current master is running on RH9 and the slave is running on CentOS 5, which is what I'm trying to upgrade the master to, also. After synchronizing the databases, I've run 'reset master' and 'reset slave' on their respective servers, then 'change master to...' on the slave, but 'show slave status' always displays: 'Slave_IO_Running: No' And here is the log entry from the slave: 071113 9:16:19 [ERROR] Slave I/O thread: error connecting to master '[EMAIL PROTECTED]:3306': Error: 'Lost connection to MySQL server during query' errno: 2013 retry-time: 60 retries: 86400 071113 9:17:35 [Note] Slave I/O thread killed while connecting to master The replication user has 'replication slave' privileges, and basically I've duplicated my.cnf from the old to the new master. I've done some Googling and searching of archives but not much luck. Fortunately, I've been trying out the master upgrade on a temp machine, and it's fairly easy to revert back to the current master server. But if anyone has thoughts or suggestions about what to try next, I'd be most appreciative. Thanks, David.
