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Increased Number of Error 2003 on Replication Replicas After Upgrade to MySQL 5.7+ or Reducing replica_net_timeout: "[ERROR] Replica I/O for channel '': error reconnecting to source '...' - retry-time: 60 retries: 3, Error_code: 2003" (Doc ID 2329395.1)

Last updated on SEPTEMBER 04, 2023

Applies to:

MySQL Server - Version 5.7 and later
Information in this document applies to any platform.


Disclaimer: Starting from v8.0, some terms have been deprecated. Older releases will only use the deprecated terminology, and new releases will only use new terminology. Please see for a complete list of those changes, and in which minor versions it happened.

After upgrading to MySQL 5.7 or reducing the replica_net_timeout option, the replication replica starts to report errors like:


MySQL was upgraded to version 5.7 or later or replica_net_timeout was reduced.


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