What Should I Do If Only Some Nodes in a HANA Cluster Can Communicate with the CDM Cluster?

Symptom

What should I do If only some nodes in a HANA cluster can communicate with the CDM cluster?

Solution

To ensure that CDM can communicate with the HANA cluster, perform the following operations:

1. Disable Statement Routing of the HANA cluster. Note that this will increase the pressure on configuration nodes.
2. When creating a HANA link, add the advanced attribute distribution and set its value to off.

After the preceding configurations are complete, CDM can communicate with the HANA cluster.