What Should I Do If an Error Is Reported When the BE Runs a Data Import or Query Task?

Symptom

When data is imported or queried, the following error message is displayed:

Not connected to 192.168.100.1:8060 yet, server_id=384

Cause Analysis

• The BE node where the task is running breaks down.
• RPC congestion or other errors occur.

Procedure

• If the BE node where the task is running breaks down, check the breakdown cause and rectify the fault.
• If a large amount of unsent data on the RPC source exceeds the threshold, set the following parameters:
  • brpc_socket_max_unwritten_bytes: specifies the threshold of the amount of data that is not sent. The default value is 1 GB. If the amount of data that is not sent exceeds the threshold value, the OVERCROWDED error is reported. You need to increase the value.
  • tablet_writer_ignore_eovercrowded: specifies whether to ignore OVERCROWDED error that occurs during data import. The default value is false. This parameter is used to prevent import failures and improve stability.
  • max_body_size: specifies the maximum packet size allowed. The default value is 3 GB. If the query contains data of the string or bitmap type, you can modify this parameter to avoid this problem.