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https://issues.apache.org/jira/browse/LUCENE-10287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17454404#comment-17454404
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ASF subversion and git services commented on LUCENE-10287:
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Commit 35eff443a76fe0781ff7e1b2a2108a70946b5192 in lucene's branch
refs/heads/main from Tomoko Uchida
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=35eff44 ]
LUCENE-10287: Re-add abstract FSDirectory class as a supported directory (#522)
> 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: 9.1, 10.0 (main), 9.x
>
> Time Spent: 50m
> 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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