I run 4.1.20 in master/master for nagios clustering. Everything was working fine until both machines went down due to power failure in the IDC. On powering back up one of the machines has come back fine but on the 'secondary' bearing in mind this is master/master but actually the 01 machine is the active one the 02 machine is showing this in the log


080705 4:44:36 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position (server_errno=1236) 080705 4:44:36 [ERROR] Got fatal error 1236: 'Client requested master to start replication from impossible position' from master when reading data from binary log 080705 4:44:36 [ERROR] Slave I/O thread exiting, read up to log 'nagios01-bin.000015', position 1005639002



seems this was caused by the log on the secondary being larger than on the primary somehow, rotating the log to the next one and its back running.

thanks



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