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It turns out that there is a database that is also a slave database, but the configuration file has not changed.

Dba: (none) > start slave

ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository

Solution:

one

Reset master

And then at change master

② modifies the relay_log=/var/lib/mysql/msql-relay.log of my.conf 's configuration file

You can change it to another name (relay_log=/var/lib/mysql/msql-salve-relay.log) or modify the directory

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