Have the following scenario: Using MQ v5.3 csd5. I disconnect a machine from the network hosting a queue manager which supports a clustered queue. I then put a message to that clustered queue from elsewhere in the cluster. I monitor the status of the active channels on the queue manager that will transmit the message to the disconnected node. The cluster sender channel goes to binding and stays in that state for a long period of time before going into a retrying state.
I reconnect the machine and leave the queue manager stopped. I resend the message and the cluster sender goes binding and then in short order goes into retrying. I then do the same thing using a sender channel. With the target machine disconnected I send a message and the status of the sender channel goes to binding followed in short order by retrying. It seems that with cluster sender channels the presence of the target queue manager tcpip address makes a difference to how long it stays in a binding state. A sender channel seems to be uneffected by the presence or absence of the target tcpip address. This would be of interest if the program doing the put specifies MQC.MQOO_BIND_NOT_FIXED. The message is placed on the cluster transmit queue and sits there until the cluster sender channel goes into a retrying state at which time it will be sent to another instance of the cluster queue. In my case I've set up a cluster exit (one of sample programs distributed with MQ) which first sends messages to a specific queue manager and then fails over to any remaining queue managers hosting an instance of the clustered queue. While the binding state is in effect the queue depth of the transmit queue grows and the messages will not be forwarded on to other active queue managers hosting an instance of queue. This is why the time needed to get to a retrying state is important. Does anyone have any insight into this? Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
