The Heartbeat (tag 35-MsgType=0) message is sent at regular intervals to ensure that the connection between the client and CME Globex is in a normal state. The heartbeat interval is specified during logon in tag 108-HeartBtInt of the Logon (tag 35=A) message. If either the client or CME Group does not send messages within the time defined in tag 108-HeartBtInt, then a Heartbeat message is transmitted. A Heartbeat message is also sent in response to a Test Request (35=1) message.
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CME Group requires a heartbeat interval between 5 and 60 seconds. Intervals of less than 5 seconds are not permitted. Intervals longer than 60 seconds are not supported. The recommended value is 30 (seconds). |
- Set the heartbeat interval between 5 and 60 seconds. If the client system sets the heartbeat interval to greater than 60 seconds, the client system will not be able to logon.
- CME Globex does not generate Heartbeat messages when responding to a Resend Request. Heartbeats are not sent even in highly unusual cases when the Resend Request takes longer to process than a heartbeat interval. For additional information, see Resend Request.
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