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https://issues.apache.org/jira/browse/LUCENE-6762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14712250#comment-14712250
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Mike Drob commented on LUCENE-6762:
-----------------------------------
A stack trace representative of the issue (this is from LUCENE 4.4)
{noformat}
java.io.FileNotFoundException: /path/to/index/_879r.si (No such file or
directory)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:241)
at
org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:193)
at
org.apache.lucene.codecs.lucene40.Lucene40SegmentInfoReader.read(Lucene40SegmentInfoReader.java:50)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:334)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:380)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:812)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:663)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:376)
at org.apache.lucene.index.CheckIndex.checkIndex(CheckIndex.java:382)
at org.apache.lucene.index.CheckIndex.main(CheckIndex.java:1854)
{noformat}
You can fake out the sanity checks by copying some other *.si file in place,
and initial impression is that the tool works.
> CheckIndex cannot "fix" indexes that have individual segments with missing or
> corrupt .si files because sanity checks will fail trying to read the index
> initially.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-6762
> URL: https://issues.apache.org/jira/browse/LUCENE-6762
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Mark Miller
> Priority: Minor
>
> Seems like we should still be able to partially recover by dropping these
> segments with CheckIndex.
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