SDK connection to nodes other than data nodes fails with [Error: unambiguous_timeout (14)]

Summary

NodeJS SDK (4.2.2) on connecting to a CB cluster (7.1.4) exits with the error:

failed to open bucket: [Error: unambiguous_timeout (14)] { code: 14 }

e error occurs when the address of a non-data node is added to the connection string and a bucket is then accessed.

Reproduction Steps

Couchbase Cluster

• Version: 7.1.4
• Bucket: travel-sample
• Node Configuration:
  • Node 1: Data (10.5.0.2)
  • Node 2: Data (10.5.0.3)
  • Node 3: Index+query (10.5.0.4)
  • Node 4: query (10.5.0.5)

JS Code

index.js consists of the different types of connections attempted. A total of 7 different cases were tested out.

Logs

DEBUG level logs of the SDK were collected for all the 7 cases. 

Couchbase server logs were collected:

https://supportal.couchbase.com/snapshot/f1d66931b7128d1e69e3d70b58b27547::0

s3://cb-customers-secure/ritesh-test/2023-04-23/collectinfo-2023-04-23t161407-ns_1@10.5.0.4.zip
s3://cb-customers-secure/ritesh-test/2023-04-23/collectinfo-2023-04-23t161407-ns_1@10.5.0.5.zip
s3://cb-customers-secure/ritesh-test/2023-04-23/collectinfo-2023-04-23t161407-ns_1@10.5.0.3.zip
s3://cb-customers-secure/ritesh-test/2023-04-23/collectinfo-2023-04-23t161407-ns_1@10.5.0.2.zip