Increased Number of Error 2003 on Replication Slaves After Upgrade to MySQL 5.7+ or Reducing slave_net_timeout: "[ERROR] Slave I/O for channel '': error reconnecting to master '...' - retry-time: 60 retries: 3, Error_code: 2003"

(Doc ID 2329395.1)

Last updated on NOVEMBER 19, 2017

Applies to:

MySQL Server - Version 5.5 and later
Information in this document applies to any platform.

Symptoms

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

 

Changes

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

Cause

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