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From "Jerry Cwiklik (JIRA)" <...@uima.apache.org>
Subject [jira] [Created] (UIMA-5123) UIMA-AS: Cas Multiplier service doesnt recover from broker restart
Date Wed, 28 Sep 2016 16:42:20 GMT
Jerry Cwiklik created UIMA-5123:
-----------------------------------

             Summary: UIMA-AS: Cas Multiplier service doesnt recover from broker restart
                 Key: UIMA-5123
                 URL: https://issues.apache.org/jira/browse/UIMA-5123
             Project: UIMA
          Issue Type: Bug
          Components: Async Scaleout
            Reporter: Jerry Cwiklik
            Assignee: Jerry Cwiklik
             Fix For: 2.9.0AS


After broker restart the top level UIMA-AS service Cas Multiplier does not recover completely.
The jms listener on an input queue recovers fine, but a listener on a temp queue processing
FreeCas requests does not. 

The temp queue is created on a service startup. When a broker is bounced, this temp queue
is no longer valid as it was created using an old broker connection. The listener on this
temp queue just keeps logging rapidly filling a log. All outgoing child CASes contain a stale
replyTo queue and such CASes are never freed by the service leading to an empty Cas Pool eventually.

There is no auto recovery of temp queues. A listener on a temp queue must be shutdown and
instantiated again. 

When a lost connection is detected, the service must:
1) invalidate its listener on a temp queue (FreeCas queue)
2) all unacknowledged child CASes that have been dispatched to a client must be automatically
released.
3) a new temp queue should be created along with a listener for it.

When UIMA-AS client is unable to send FreeCas requests to a service due to a stale queue,
it should log a message with a CAS Id and complete processing the CAS.



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