From e26a2fcedefb69aab21aebf017174af164de8294 Mon Sep 17 00:00:00 2001
From: octo-patch <octo-patch@github.com>
Date: Thu, 23 Apr 2026 12:36:32 +0800
Subject: [PATCH] fix(socket): stop infinite reconnection on Invalid namespace
 error
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When the Socket.IO server responds with an 'Invalid namespace' error,
the client was falling into the auto-reconnect path and retrying
forever. This caused an endless 'Reconnecting...' UI state with no
way to recover short of a hard page reload.

'Invalid namespace' is a permanent error — the server explicitly
rejected the namespace and retrying will not succeed until the
configuration is corrected. Treat it the same as auth failures:
disconnect, clear the socket, set authFailed to stop the
re-initialization loop, and log a diagnostic message pointing to
NEXT_PUBLIC_SOCKET_URL as the likely misconfiguration.

Fixes #2704
---
 .../sim/app/workspace/providers/socket-provider.tsx | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/apps/sim/app/workspace/providers/socket-provider.tsx b/apps/sim/app/workspace/providers/socket-provider.tsx
index 9a63092f97..cf1e8d4836 100644
--- a/apps/sim/app/workspace/providers/socket-provider.tsx
+++ b/apps/sim/app/workspace/providers/socket-provider.tsx
@@ -409,6 +409,9 @@ export function SocketProvider({ children, user }: SocketProviderProps) {
             error.message?.includes('Authentication failed') ||
             error.message?.includes('Authentication required')
 
+          // Check if this is a permanent configuration error — retrying won't help
+          const isNamespaceError = error.message?.includes('Invalid namespace')
+
           if (isAuthError) {
             logger.warn(
               'Authentication failed - stopping reconnection attempts. User may need to refresh/re-login.'
@@ -418,6 +421,16 @@ export function SocketProvider({ children, user }: SocketProviderProps) {
             setAuthFailed(true)
             setIsReconnecting(false)
             initializedRef.current = false
+          } else if (isNamespaceError) {
+            logger.warn(
+              'Invalid namespace error - stopping reconnection attempts. Check NEXT_PUBLIC_SOCKET_URL configuration.',
+              { message: error.message }
+            )
+            socketInstance.disconnect()
+            setSocket(null)
+            setAuthFailed(true)
+            setIsReconnecting(false)
+            initializedRef.current = false
           } else if (socketInstance.active) {
             // Temporary failure, will auto-reconnect
             setIsReconnecting(true)