agingade commented on a change in pull request #5371:
URL: https://github.com/apache/geode/pull/5371#discussion_r455242606



##########
File path: 
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/command/RegisterInterestList66.java
##########
@@ -163,29 +162,40 @@ public void cmdExecute(final Message clientMessage, final 
ServerConnection serve
     }
     try {
       securityService.authorize(Resource.DATA, Operation.READ, regionName);
-      AuthorizeRequest authzRequest = serverConnection.getAuthzRequest();
-      if (authzRequest != null) {
+      AuthorizeRequest authorizeRequest = serverConnection.getAuthzRequest();
+      if (authorizeRequest != null) {
         if (!DynamicRegionFactory.regionIsDynamicRegionList(regionName)) {
           RegisterInterestOperationContext registerContext =
-              authzRequest.registerInterestListAuthorize(regionName, keys, 
policy);
-          keys = (List) registerContext.getKey();
+              authorizeRequest.registerInterestListAuthorize(regionName, keys, 
policy);
+          keys = (List<Object>) registerContext.getKey();
         }
       }
       // Register interest
       
serverConnection.getAcceptor().getCacheClientNotifier().registerClientInterest(regionName,
           keys, serverConnection.getProxyID(), isDurable, 
sendUpdatesAsInvalidates, true,
           regionDataPolicyPartBytes[0], true);
-    } catch (Exception ex) {
+    } catch (Exception e) {
       // If an interrupted exception is thrown , rethrow it
-      checkForInterrupt(serverConnection, ex);
+      checkForInterrupt(serverConnection, e);
       // Otherwise, write an exception message and continue
-      writeChunkedException(clientMessage, ex, serverConnection);
+      writeChunkedException(clientMessage, e, serverConnection);
       serverConnection.setAsTrue(RESPONDED);
       return;
     }
 
-    boolean isPrimary = serverConnection.getAcceptor().getCacheClientNotifier()
-        .getClientProxy(serverConnection.getProxyID()).isPrimary();
+    CacheClientProxy ccp = 
serverConnection.getAcceptor().getCacheClientNotifier()
+        .getClientProxy(serverConnection.getProxyID());
+
+    if (ccp == null) {
+      IOException ioException = new IOException(
+          "CacheClientProxy for this client is no longer on the server , so 
registerInterest operation is unsuccessful");

Review comment:
       We could change the messaging part...




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