Error Message "connection failure error" Is Displayed During GDS Data Transmission

Symptom

Error Message "connection failure error" is displayed during GDS data transmission.

Possible Causes

1. The GDS process breaks down. Run the following command to check whether the GDS process breaks down:

   ps ux|grep gds

   If the following information is displayed, the GDS process is started successfully:

   

2. The GDS startup parameter -H is incorrectly configured.

   -H address_string: indicates servers that are allowed to connect to and use GDS. The value must be in CIDR format. Set this parameter to allow the GaussDB(DWS) cluster to use GDS to import data. Ensure that the configured network segment covers all servers in the GaussDB(DWS) cluster.

Handling Procedure

1. Restart GDS. For details, see "Data Migration > Data Import > Using GDS to Import Data from a Remote Server > Installing, Configuring, and Starting GDS" in Data Warehouse Service Development Guide.For details, see Installing, Configuring, and Starting GDS.
2. Change the parameter –H in the GDS startup command to 0/0 to check whether the fault is caused by this parameter. If the commands can be executed after the parameter value is changed to 0/0, the original parameter settings are improper and the configured network segment does not contain all servers in the GaussDB(DWS) cluster.