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https://issues.apache.org/jira/browse/LUCENE-3541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138396#comment-13138396
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Robert Muir commented on LUCENE-3541:
-------------------------------------
I agree its horrible, if someone properly clone()'s indexinputs and uses
threads they are sharing this same buffer and its just asking for corrumption.
> remove IndexInput.copyBuf
> -------------------------
>
> Key: LUCENE-3541
> URL: https://issues.apache.org/jira/browse/LUCENE-3541
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Robert Muir
> Priority: Critical
> Fix For: 3.5, 4.0
>
>
> this looks really broken/dangerous as an instance variable.
> what happens on clone() ?! copyBytes can instead make its own array inside
> the method.
> its protected, so ill list in the 3.x backwards breaks section since its
> technically a backwards break.
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