Show warning instead of error on duplicate connection

Summary: Show warning instead of error on duplicate connection

Reviewed By: alexeylang

Differential Revision: D9117286

fbshipit-source-id: 81b135584bb3f44e37388de6df9d6386e5fb758a

React/Inspector/RCTInspectorPackagerConnection.m

@@ -95,9 +95,11 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
 - (void)handleConnect:(NSDictionary *)payload
 {
   NSString *pageId = payload[@"pageId"];
-  if (_inspectorConnections[pageId]) {
+  RCTInspectorLocalConnection *existingConnection = _inspectorConnections[pageId];
+  if (existingConnection) {
     [_inspectorConnections removeObjectForKey:pageId];
-    RCTLogError(@"Already connected: %@", pageId);
+    [existingConnection disconnect];
+    RCTLogWarn(@"Already connected: %@", pageId);
     return;
   }