Symptoms
Assume that you deploy a Big Data Cluster (BDC) with multiple compute nodes and call Dynamic Management Views (DMVs) associated with BDC or PolyBase. You may notice that most of the DMVS have missing or incomplete entries and cause errors to be logged by the Parallel Data Warehouse (PDW) Engine Service in the compute-0-0 pod.
For example, for all compute_nodes with a compute_node_id greater than 1, the following DMV query may have incomplete rows (with NULL values):
select compute_pool_id, compute_node_id, process_name, process_id from sys.dm_exec_compute_node_status
compute_pool_id compute_node_id process_name process_id
0 1 Engine 48
0 1 DMS 44
1 1 Engine 48
1 1 DMS 44
1 2 DMS NULL
The following DMV query may return the wrong result (missing rows for compute_node_id greater than 1):
select * from sys.dm_exec_dms_services
The following error can be found in the PDW Engine Service logs in the compute-0-0 pod:
DateandTime [Thread:ThreadId] [GeneralInstrumentation:InternalPingErrorEvent] (Error, Low):
System.ServiceModel.Security.MessageSecurityException: Identity check failed for outgoing message. The expected DNS identity of the remote endpoint was 'compute-0-0.dkdomain.local' but the remote endpoint provided DNS claim 'compute-0-1.dkdomain.local'. If this is a legitimate remote endpoint, you can fix the problem by explicitly specifying DNS identity 'compute-0-1.dkdomain.local' as the Identity property of EndpointAddress when creating channel proxy.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
References
Learn about the terminology that Microsoft uses to describe software updates.
