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Error handling in ColdFusion WebSocket
Last update:
May 18, 2026
The WebSocket errors are categorized as follows:
| Category | Description | Response code |
Channel Error | For example, channel not present or client has already subscribed to the channel | -1 |
Application Error | Runtime errors while invoking CFC | 4001 |
Success | On successful completion of request | 0 |
Note: If you have defined an Error Handler, it receives the responses -1 and 4001. If not defined, the response goes to Message Handler.
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