Help Center/ Data Replication Service/ Troubleshooting/ Failure Cases/ Real-Time Migration and Synchronization from MySQL to MySQL/ Full or Incremental Phase Error: Communications link failure
Updated on 2023-01-17 GMT+08:00
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Full or Incremental Phase Error: Communications link failure

Scenarios

During a full or incremental migration or synchronization, an error is reported, and the log information is as follows: service %s failed, cause by: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

Possible Causes

The connection to the source or destination database fails to be established.

Solution

  1. Check whether the source or destination database is running properly.
  2. Check whether the network connection between the DRS instance and the source or destination database is normal.
  3. Check whether the IP address of the DRS instance is allowed to access the source or destination database.