VCF on VxRail: Failed to load cluster details: Failed to fetch response

VCF on VxRail 4.2.0.0 or 4.3.1.0.

Adding a new VxRail cluster into the MGMT domain fails on the cluster discovery steps.
Error:

Failed to load cluster details: Failed to fetch the response due to some internal error, check logs for more details.

 


Domain manager log:

2022-01-05T03:36:54.966+0000 ERROR [vcf_dm,14bdd126c1a4dd0d,69a9] [c.v.v.v.c.s.VxRailClusterService,dm-exec-12] Error fetching clusters java.lang.NullPointerException: null at com.vmware.vxrail.vcf.clustermanager.services.VxRailClusterService.lambda$populatePortGroupMapFromNicInfo$16(VxRailClusterService.java:702)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566)

Once the above discovery issue is resolved, the error below occurs. This occurs while running the multiple VDS python script to ingest the VxRail.

2022-01-19T03:49:56.275+0000 INFO [vcf_dm,d98f9b7369eef9d1,7832] [c.v.v.secure.http.HttpClientService,dm-exec-18] Response Body: {"message": "The provided vCenter credentials are not valid."}
xxx@vsphere.local account credentials was tested and able to login to vcenter and it has been also updated in lockbox for vxrail manager.
 

To resolve the first error, modify the Network port group prefixes back to default.

Network Type Prefix

=================
Management Network
VxRail Management
vSphere vMotion
vSAN Virtual SAN
vCenter Server Network

Retry the operation to discover the cluster nodes.


To resolve the second error, ensure the VxRail manager responsible for the VxRail cluster is healthy.

1. The VxRail plug-in should be working. 
2. The certificate CA chain should all be working.
3. The host management vCenter manager account credential should be known to SDDC Manager and ensure that the user can log in using it.
   See KB: 000157662(Login with support account required)
4. Check the vCenter SSO passwords from SDDC using: lookup_passwords command
5. In SDDC Manager, ensure that the SSO administrator user credential was is set to capture the VxRail cluster information.
6. Run the following command with root credentials to check:

   curl -X GET https://vxrail manager FQDN:443/rest/vxm/v1/system/cluster-hosts -k -u "administrator@vsphere.local:<SSO Password>"