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https://issues.apache.org/jira/browse/DISPATCH-744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15968195#comment-15968195
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Ted Ross commented on DISPATCH-744:
-----------------------------------
The original behavior may be restored using the 'allowUnsettledMulticast'
configuration flag:
{noformat}
router {
id: router-A
...
allowUnsettledMulticast: yes
}
{noformat}
> Reject unsettled deliveries to multicast addresses by default
> -------------------------------------------------------------
>
> Key: DISPATCH-744
> URL: https://issues.apache.org/jira/browse/DISPATCH-744
> Project: Qpid Dispatch
> Issue Type: Improvement
> Components: Router Node
> Reporter: Ted Ross
> Assignee: Ted Ross
> Fix For: 1.0.0
>
>
> This change is intended to address a behavior of the router that might be
> considered misleading.
> When messages are delivered to an address that has a multicast distribution,
> delivery disposition and settlement cannot be tracked because there may be
> multiple consumers. Because of this, if a delivery is unsettled, the first
> router will settle the message unilaterally and forward it on in a
> pre-settled state. The result is that the sender may receive a
> settled-and-accepted disposition for a message that was eventually dropped
> without being delivered to a consumer.
> The solution is to reject deliveries to multicast addresses that are not
> already pre-settled by the sender. The rejection shall carry the text:
> "Deliveries to a multicast address must be pre-settled".
> This behavior shall be the new default behavior. A configuration flag shall
> be provided to restore the original behavior.
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