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Displaying posts with tag: Errno: 1593 (reset)
Resolving Error: master and slave have equal MySQL server UUIDs

If you’ve run into the following error, then there area couple quick fixes:

Errno: 1593
Fatal error: The slave I/O thread stops because master and slave
have equal MySQL server UUIDs; these UUIDs must be different for
replication to work.

To give some background first, starting in MySQL 5.6, the server generates a true UUID in addition to the –server-id supplied by the user. This is ultimately to help with new replication features.

From a under-the-hood view, when starting, the MySQL server automatically obtains a UUID as follows (per the manual):

  1. Attempt to read and use the UUID written in the file data_dir/auto.cnf (where data_dir is the server’s data directory); exit on success.
  2. Otherwise, generate a new UUID and save it to this file, creating the file if necessary.
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