Fix TryGetLocationForGatewayDiagnostics returning true for unknown endpoints

NaluTripician · Copilot · NaluTripician · commit adbb74154316 · 2026-04-21T15:50:42.000-07:00
The fallthrough path returned 'true' unconditionally after calling
GetLocation, even when GetLocation returned null for unrecognized
endpoints. Changed to 'return regionName != null' to match the
contract and the default-endpoint branch.

Co-authored-by: Copilot &lt;223556219+Copilot@users.noreply.github.com&gt;
diff --git a/Microsoft.Azure.Cosmos/src/Routing/LocationCache.cs b/Microsoft.Azure.Cosmos/src/Routing/LocationCache.cs
@@ -209,7 +209,7 @@ public bool TryGetLocationForGatewayDiagnostics(Uri endpoint, out string regionN
             }
 
             regionName = this.GetLocation(endpoint);
-            return true;
+            return regionName != null;
         }
 
         /// <summary>

Original file line number	Diff line number	Diff line change
`@@ -209,7 +209,7 @@ public bool TryGetLocationForGatewayDiagnostics(Uri endpoint, out string regionN`
`209`	`209`	`}`
`210`	`210`
`211`	`211`	`regionName = this.GetLocation(endpoint);`
`212`		`- return true;`
	`212`	`+ return regionName != null;`
`213`	`213`	`}`
`214`	`214`
`215`	`215`	`/// <summary>`