A security analyst is troubleshooting an integration that intermittently fails to fetch incidents from an external ticketing system. The integration logs show `ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))` errors, but only for requests that return very large payloads. Smaller requests succeed consistently. What is the most likely cause of this issue?
- AThe Cortex XSOAR engine running the integration is running out of memory when processing large payloads.
- BThe ticketing system's API is rate-limiting the integration for large requests.
- CThe integration is failing to parse the large JSON response correctly.
- DThe external ticketing system's server is prematurely closing the connection due to resource exhaustion or timeout on its end.
Show answer & explanationAnswer & explanation
Correct answer: D. The external ticketing system's server is prematurely closing the connection due to resource exhaustion or timeout on its end.
A `RemoteDisconnected` error, especially when specific to large payloads, strongly suggests that the remote server (the ticketing system) is closing the connection prematurely. This often happens if the server has resource limits (memory, CPU, network bandwidth) or its own internal timeout for handling large responses, causing it to terminate the connection before sending a full response.
Why the other options are wrong
- A. If the XSOAR engine ran out of memory, the error would likely be a Python `MemoryError` or a container-level OOM (Out Of Memory) kill, not a network-level `RemoteDisconnected` error originating from the remote end.
- B. Rate limiting typically returns HTTP 429 errors or similar, not a `RemoteDisconnected` error. While possible, the error message points more directly to a connection issue.
- C. Parsing errors usually manifest as `json.decoder.JSONDecodeError` or similar, occurring after the data is received, not as a `ConnectionError` indicating the connection was aborted *before* a full response.
RemoteDisconnected Error
A `RemoteDisconnected` error indicates that the remote server (the API endpoint) closed the connection unexpectedly without sending a complete response, often due to server-side issues like resource exhaustion, internal timeouts, or network problems.
- Originates from the remote server, not the client.
- Often seen with large data transfers.
- Suggests server-side resource limits or timeouts.
Memory trick: Remote disconnect means server's end is sick.