Version
6.3.1
Explanation
Connection is disconnected.
Cause
This error has various causes. The following are the main causes:
1. The server forcefully closed the client connection due to timeout.
2. The user forcefully closed the connection.
3. The database was shut down.
Action
1. Tune a long-running query and increase the session’s timeout value
2. Check whether the database service runs normally.
Reference
N/A