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https://issues.apache.org/jira/browse/UIMA-5058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17440286#comment-17440286
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Richard Eckart de Castilho commented on UIMA-5058:
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Looks like some of the changes for this issue were filed under another issue
ID. E.g. the unit tests for this issue seem to be under UIMA-5043, e.g. commit
4b7382227a38412a7fb6987ea7e3b0d86c64ce2a.
> Scaled out pipelines can falsely trigger the error: Illegal adding of
> additional MetaData after CASes have been defined
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: UIMA-5058
> URL: https://issues.apache.org/jira/browse/UIMA-5058
> Project: UIMA
> Issue Type: Bug
> Components: Core Java Framework
> Affects Versions: 2.8.1SDK
> Reporter: Burn L. Lewis
> Assignee: Marshall Schor
> Priority: Major
> Fix For: 2.9.0SDK, 3.0.0SDK-alpha02
>
>
> When UIMA-AS scales out a synchronous UIMA pipeline it sequentially creates
> separate AEs in separate threads, sharing the resource manager. Creation of
> the 2nd (identical) AE will fail with "Illegal adding of additional MetaData
> after CASes have been defined" if a descriptor imports 2 type-system files,
> one of which is included in the other. The check fails to recognize that the
> types loaded by the 2nd AE are already in the resource manager because of the
> way type-systems are cached.
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