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Diagnosing a CTP Market Data Handshake Failure

Article vn.py community
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Summary

This community post reports a connection problem in a combined testing and live trading setup. The CTP market data connection fails with a handshake decode error, while the trading server connects, authenticates, logs in, confirms settlement information, and returns contract details. The log therefore distinguishes a market data connection failure from a general failure to reach the broker.

The author suspects that the installed API DLL may be newer than the version supported by the futures company’s server, and asks how to resolve the mismatch. The post does not provide a confirmed diagnosis, troubleshooting steps, or a fix, so the DLL explanation remains a hypothesis. It offers a useful example of using separate connection logs to narrow down a fault, but it is not a validated guide to CTP configuration or a trading method.

Key ideas

  • The reported decode error occurs on the CTP market data connection.
  • The trading connection succeeds through login and contract queries, so the issue appears specific to market data.
  • A mismatch between the API DLL and broker server version is proposed but not confirmed.
  • The post gives no resolution, so its diagnostic value is limited.

Tags

FuturesExecution

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.