When receiving on TCP/IP, a maximum number of outstanding connection requests is set. This can be considered a backlog of requests waiting on the TCP/IP port for the listener to accept the request.
The default listener backlog value on z/OS is 255. If the backlog reaches this values, the TCP/IP connection is rejected and the channel will not be able to start.
For MCA channels, this results in the channel going into a RETRY state and retrying the connection at a later time.
For client connections, the client receives an MQRC_Q_MGR_NOT_AVAILABLE reason code from MQCONN and should retry the connection at a later time.
Notices |
Downloads |
Library |
Support |
Feedback
![]() ![]() |
csq12as2 |