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https://issues.apache.org/jira/browse/LUCENE-3255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13056606#comment-13056606
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Simon Willnauer commented on LUCENE-3255:
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bq. Not sure what to do if we really need to fix this in pre-3.x releases...
there is not much todo really here. I don't see a good way to fix this there.
:/
> Corrupted segment file not detected and wipes index contents
> ------------------------------------------------------------
>
> Key: LUCENE-3255
> URL: https://issues.apache.org/jira/browse/LUCENE-3255
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.9.4, 3.2
> Reporter: Mark Harwood
> Assignee: Michael McCandless
> Attachments: AllZerosSegmentFile, BadSegmentsFileTest.java,
> LUCENE-3255_testcase.patch
>
>
> Lucene will happily wipe an existing index if presented with a latest
> generation segments_n file of all zeros. File format documentation says
> segments_N files should start with a format of -9 but SegmentInfos.read
> accepts >=0 as valid for backward compatibility reasons.
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