Help Center/ Data Replication Service/ Troubleshooting/ Troubleshooting/ Failure Cases/ Real-Time Migration and Synchronization from MySQL to MySQL/ Full or Incremental Phase Error: Can not read response from server
Updated on 2025-07-21 GMT+08:00
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Full or Incremental Phase Error: Can not read response from server

Scenarios

During a full or incremental migration or synchronization, an error is reported, and the log information is as follows: service LOGMANAGER failed, cause by: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

Possible Causes

  • The network bandwidth between the DRS replication instance and the source database is too small or unstable.
  • The source database is overloaded.

Solution

Contact the source database O&M personnel to check the source database load and check whether packet loss occurs on the network between the source database and the replication instance.