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6.8.6. Override the Default Group Name
When a queue has message groups enabled, messages are grouped based on a match with a header field. Messages that have no match in their headers for a group are assigned to the default group. The default group is preconfigured as
qpid.no-group. You can change this default group name by supplying a value for the default-message-group configuration parameter to the broker at start-up. For example, using the command line:
qpidd --default-message-group "EMPTY-GROUP"
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