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Posted to dev@uima.apache.org by "Jerry Cwiklik (JIRA)" <de...@uima.apache.org> on 2016/03/31 20:58:25 UTC

[jira] [Closed] (UIMA-4881) UIMA DUCC: Optimize JP handling of no work from the JD

     [ https://issues.apache.org/jira/browse/UIMA-4881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jerry Cwiklik closed UIMA-4881.
-------------------------------
    Resolution: Fixed

Modified to use one thread to retry JD WI requests

> UIMA DUCC: Optimize JP handling of no work from the JD
> ------------------------------------------------------
>
>                 Key: UIMA-4881
>                 URL: https://issues.apache.org/jira/browse/UIMA-4881
>             Project: UIMA
>          Issue Type: Improvement
>            Reporter: Jerry Cwiklik
>            Assignee: Jerry Cwiklik
>             Fix For: 2.1.0-Ducc
>
>
> When a JD returns no work, each worker JP thread sleeps for a bit and than asks JD again. At large scaleout many threads repeat this cycle causing the JD to spend a lot of time handling WI requests.
> Modify the JP to use a single thread in each process to retry request for work. While a single thread repeatedly retries other threads block until:
> 1) Retry thread receives work item
> 2) JP terminates



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