[System Test]Failed on calling /pools/nodes, err=json: cannot unmarshal array into Go value of type map[string]interface {}, statusCode=500 - error in longevity

2021-03-31T05:36:00.762-07:00 ERRO GOXDCR.TopoSvc: Failed to unmarshal the response as json, err=json: cannot unmarshal array into Go value of type map[string]interface {}, bod=["Unexpected server error, request logged."]

 res=&{500 Internal Server Error 500 HTTP/1.1 1 1 map[Cache-Control:[no-cache,no-store,must-revalidate] Content-Length:[44] Content-Type:[application/json] Date:[Wed, 31 Mar 2021 12:36:00 GMT] Expires:[Thu, 01 Jan 1970 00:00:00 GMT] Pragma:[no-cache] Server:[Couchbase Server] X-Content-Type-Options:[nosniff] X-Frame-Options:[DENY] X-Permitted-Cross-Domain-Policies:[none] X-Xss-Protection:[1; mode=block]] 0xc0101c6c60 44 [] false false map[] 0xc0224b3c00 <nil>}

2021-03-31T05:36:00.762-07:00 ERRO GOXDCR.TopoSvc: Failed to unmarshal the response as json, err=json: cannot unmarshal array into Go value of type map[string]interface {}, bod=["Unexpected server error, request logged."]

 res=&{500 Internal Server Error 500 HTTP/1.1 1 1 map[Cache-Control:[no-cache,no-store,must-revalidate] Content-Length:[44] Content-Type:[application/json] Date:[Wed, 31 Mar 2021 12:36:00 GMT] Expires:[Thu, 01 Jan 1970 00:00:00 GMT] Pragma:[no-cache] Server:[Couchbase Server] X-Content-Type-Options:[nosniff] X-Frame-Options:[DENY] X-Permitted-Cross-Domain-Policies:[none] X-Xss-Protection:[1; mode=block]] 0xc0185823c0 44 [] false false map[] 0xc007fd8300 <nil>}

2021-03-31T05:36:00.762-07:00 WARN GOXDCR.Utils: top_svc.getHostInfo() took 2m16.09348563s

2021-03-31T05:36:00.762-07:00 WARN GOXDCR.Utils: top_svc.getHostInfo() took 15.61356765s

2021-03-31T05:36:00.762-07:00 ERRO GOXDCR.GenericSupervisor: Error retrieving kv nodes for pipeline 67877a36cdf474ae5671e50a794fac9b/bucket9/bucket9. Skipping dcp stats check. err=Failed on calling /pools/nodes, err=json: cannot unmarshal array into Go value of type map[string]interface {}, statusCode=500

2021-03-31T05:36:00.762-07:00 ERRO GOXDCR.GenericSupervisor: Pipelin