Comments on: Confusing MySQL Replication Error Message

By: Guano

Guano — Tue, 26 Oct 2010 14:39:02 +0000

I’ve created 2 extra slaves with the same server-id as the original slave, after some time, one of them caught up with the master and the other one started getting further behind, I noticed the I/O message in the logs.
Should I rebuild the slaves from scratch (200 GB of data) or can I just change the server-id and restart?

By: Harsha

Harsha — Tue, 31 Aug 2010 09:54:53 +0000

Additional info:

Master is 5.1.48 [server-id 1]
1st Slave is 5.1.50 [server-id 2] and
2nd slave is 5.1.48 [server-id 3]

Does anyone see incompatibility issue?

Note: 1. replication is happening but showing the error message that is confusing

By: Harsha

Harsha — Tue, 31 Aug 2010 06:06:13 +0000

Guys,

i get exactly the same error, but server-ids are unique

How to get out of this?

thanks,
Harsha

By: Sean Scullion

Sean Scullion — Fri, 20 Aug 2010 10:07:51 +0000

Amazing! Thank you!

By: yingkuan

yingkuan — Fri, 05 Mar 2010 02:25:25 +0000

btw, our version is 5.0.84-64

By: yingkuan

yingkuan — Fri, 05 Mar 2010 02:23:16 +0000

Thanks whole bunch! Got the error in one of our clusters. Saved me a lot of time.
Definitely misleading and confusing. Almost got our network guy killed.
It really looks like intermittent network problem, the slave is catching up with master but through errors every second.

By: Cosimo

Cosimo — Tue, 12 Jan 2010 13:14:35 +0000

Great post! I just got this error, and all the other related pages I could find were completely off-track.

Anyway, of the two slaves with the same server-id, one lagged behind with no apparent reason (of course now I know why), the other I just stopped it. Is the former slave going to ever reach the master (Seconds_behind_master = 0) or not?

By: peter

peter — Fri, 06 Jun 2008 02:45:09 +0000

Ernesto,

I think a lot of people have script or process to set server-id but things tend to break from time to time and it is great to get a good error message.

Server-id is stored in binary log and is integer this is why server-name would not work – too muich overhead.

By: Ernesto Vargas

Ernesto Vargas — Thu, 05 Jun 2008 16:56:35 +0000

One day it happen to me, and took me almost an hour to find that out.

Moving foward I always use a base my.cnf to I copy to any other server and the first thing is to increase the server-id.

Could MySQL just use the servername intead of a numeric value?