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https://issues.apache.org/jira/browse/UIMA-1223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655240#action_12655240
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Adam Lally commented on UIMA-1223:
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There is a problem in this patch due to UIMA-1248, which causes concurrent
initialization of AE instances sharing a ResourceManager to fail
intermittently. We should work around this by synchronizing the call to
UIMAFramework.produceAnalysisEngine so that only one instance can be
initialized at a time, until UIMA-1248 gets fixed.
> Annotators should be initialized in the same thread that their process method
> will later be called on
> -----------------------------------------------------------------------------------------------------
>
> Key: UIMA-1223
> URL: https://issues.apache.org/jira/browse/UIMA-1223
> Project: UIMA
> Issue Type: Bug
> Components: Async Scaleout
> Affects Versions: 2.2.2
> Reporter: Adam Lally
> Assignee: Jerry Cwiklik
> Attachments: uimaj-as-activemq-UIMA-1223-patch.txt,
> uimaj-as-core-UIMA-1223-patch.txt
>
>
> It is more convenient if an annotator is initialized on the same thread that
> it is later called on. Some components may use thread-local data and they
> won't work in UIMA-AS currently. Another advantage of doing the
> initialization in the processing thread is that you could initialize multiple
> instances of the annotator in parallel instead of sequentially, which may be
> faster for a multi-core machine.
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