Ted Ross created DISPATCH-1463:
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             Summary: Detect deliveries that are stuck in the router for a long 
time
                 Key: DISPATCH-1463
                 URL: https://issues.apache.org/jira/browse/DISPATCH-1463
             Project: Qpid Dispatch
          Issue Type: New Feature
          Components: Router Node
            Reporter: Ted Ross
            Assignee: Ted Ross
             Fix For: 1.10.0


The delayed-delivery counts are limited in that they only count deliveries that 
have been settled.  These counters do not count deliveries that are currently 
"stuck" and have not been settled.

This feature provides visibility into the number of stuck deliveries per link 
and per router.

A new counter "deliveriesStuck" shall be added to the link and router entities 
for per-link and aggregated-per-router respectively.

A delivery is considered "stuck" when it has been in the undelivered or 
unsettled lists for more than ten seconds and is still not settled.  Once a 
stuck delivery is settled or otherwise removed, it is no longer considered 
stuck.

When a link transitions from zero to one stuck delivery, an INFO log message 
shall be emitted indicating that at least one delivery is stuck on that link.



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