CNCID (24-byte character string)

Unique connection identifier.

This field allows the queue manager to reliably identify an application process by assigning it a unique identifier when it first connects to the queue manager.

Applications use the connection identifier for correlation purposes when making PUT and GET calls. All connections are assigned an identifier by the queue manager, no matter how the connection was established.

It is possible to use the connection identifier to force the end of a long running unit of work. To do this, specifying the connection identifier using the PCF command 'Stop Connection', or the MQSC command STOP CONN. For more information on using these commands, see the Programmable Control Formats, and Script (MQSC) Command Reference books.

The initial value of the field is 24 null bytes in all programming languages.