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From "Marshall Schor (JIRA)" <...@uima.apache.org>
Subject [jira] [Resolved] (UIMA-3674) Allow multiple iterators in different threads to read the CAS
Date Tue, 18 Mar 2014 20:37:47 GMT

     [ https://issues.apache.org/jira/browse/UIMA-3674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Marshall Schor resolved UIMA-3674.

    Resolution: Fixed

> Allow multiple iterators in different threads to read the CAS
> -------------------------------------------------------------
>                 Key: UIMA-3674
>                 URL: https://issues.apache.org/jira/browse/UIMA-3674
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>    Affects Versions: 2.5.0SDK
>            Reporter: Marshall Schor
>            Assignee: Marshall Schor
>            Priority: Minor
>             Fix For: 2.5.1SDK
> Some applications scale out on multi-core machines by using CAS Multipliers.  Sometimes,
it makes sense when the new CASes have a lot of identical data, to have the common part of
these in another CAS which can be set up and shared (read-only) by other threads.  Unfortunately,
this design suffers from random failures in the CAS iterator code.  Figure out what's wrong
and fix this, to start supporting read-only CASes being accessed simultaneously in a multi-core
platform on multiple threads.  Include a JUnit test case, too, if possible.

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