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Posted to issues@lucene.apache.org by "Uwe Schindler (Jira)" <ji...@apache.org> on 2021/12/05 19:26:00 UTC

[jira] [Commented] (LUCENE-10287) Add jdk.unsupported module to Luke startup script

    [ https://issues.apache.org/jira/browse/LUCENE-10287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17453663#comment-17453663 ] 

Uwe Schindler commented on LUCENE-10287:
----------------------------------------

I opened PR: https://github.com/apache/lucene/pull/517

> Add jdk.unsupported module to Luke startup script
> -------------------------------------------------
>
>                 Key: LUCENE-10287
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10287
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: luke
>    Affects Versions: 9.0
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>            Priority: Major
>             Fix For: 10.0 (main), 9.x
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> See my note on the JDK 9.0 release: When you start Luke (in module mode, as done by default), it won't use MMapDirectory when opening indexes. The reason is simple: It can't see sun.misc.Unsafe, which is needed to unmap mapped byte buffers. It will silently disable itsself (as it is not a hard dependency).
> By default we should pass the "jdk.unsupported" module when starting Luke.
> In case of a respin, this should be backported.



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