[jira] [Closed] (UIMA-2615) Ducc Service Manger: Do exponential backoff of service pingers.

["Jerry Cwiklik (JIRA)" <de...@uima.apache.org>]

     [ https://issues.apache.org/jira/browse/UIMA-2615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jerry Cwiklik closed UIMA-2615.
-------------------------------

    Resolution: Fixed

> Ducc Service Manger: Do exponential backoff of service pingers.
> ---------------------------------------------------------------
>
>                 Key: UIMA-2615
>                 URL: https://issues.apache.org/jira/browse/UIMA-2615
>             Project: UIMA
>          Issue Type: Task
>          Components: DUCC
>            Reporter: Jim Challenger
>            Assignee: Jim Challenger
>             Fix For: 1.0-Ducc
>
>
> Frequent pinging of UIMA-AS services buy the DUCC service manager is tickling a leak in ActiveMQ resulting in ActiveMQ crashing with OutOfMemory Exceptions.  Until the underlying cause of the problem is determined and resolved, the SM will do exponential back-off of the ping rate.  New jobs dependent on services reset the affected pingers to a high-rate of ping to insure responsiveness.  The rate is then doubled up to a max of 32 minutes (the threshold for bypassing the OOM is 30 minutes).



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