GatewayAddressCache: Fixes Unobserved Exception During Background Address Refresh

Microsoft.Azure.Cosmos/src/Routing/GatewayAddressCache.cs

@@ -310,6 +310,16 @@ public async Task<PartitionAddressInformation> TryGetAddressesAsync(
                                 partitionKeyRangeIdentity.CollectionRid,
                                 partitionKeyRangeIdentity.PartitionKeyRangeId,
                                 forceRefresh: true)));
+
+                    refreshAddressesInBackgroundTask.Exception?.Handle(ex =>
+                    {
+                        DefaultTrace.TraceWarning("Failed to refresh addresses in the background for the collection rid: {0} with exception: {1}. '{2}'",
+                            partitionKeyRangeIdentity.CollectionRid,
+                            ex,
+                            System.Diagnostics.Trace.CorrelationManager.ActivityId);
+
+                        return true;
+                    });
                 }
 
                 return addresses;