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From "Jerry Cwiklik (JIRA)" <...@uima.apache.org>
Subject [jira] [Closed] (UIMA-5123) UIMA-AS: Cas Multiplier service doesnt recover from broker restart
Date Fri, 11 Nov 2016 16:02:58 GMT

     [ https://issues.apache.org/jira/browse/UIMA-5123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jerry Cwiklik closed UIMA-5123.
-------------------------------
    Resolution: Fixed

Made changes to enable recovery of temp queues on both client and a service side when a broker
is bounced

> 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is no longer valid as it was created using an old broker connection.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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