Expert Advice

MQSeries_Channel_Remain_Indoubt  
Situation Description
Suggested Actions
Situation Description

The Highest In-Doubt Samples value in the Channel Summary workspace is greater than 1. The IBM MQ Monitoring agent samples the monitored queue managers for performance data. The default sample interval is 300 seconds, which is configured by the SAMPINT parameter. This situation alerts for the continuous in-doubt samples that are greater than one, which indicates that a channel remains in-doubt for too long. And the connection between the in-doubt channel and the remote channel about which messages are sent and received is lost.

 

Suggested Actions

Find out which channel triggers this situation in either the Initial Situation Values and Current Situation Values table views of the situation workspace, or in the Channel Summary workspace.

You can use the Batch Heartbeat channel parameter (BATCHHB) to reduce the opportunity for a channel to be placed in doubt. When this paramter is specified, a sender channel first checks if the remote channel is still active before it takes any further action. If no response is received, the receiver channel is considered to be no longer active. The messages can be rolled back and rerouted, and the sender channel is not put in doubt.

In-doubt channel problems are usually solved automatically when the connection is re-established. However, you can manually resynchronize the channel when necessary. For manual synchronization process, refer to IBM MQ (WebSphere MQ) online help.

 

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