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https://issues.apache.org/jira/browse/LUCENE-4405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130708#comment-14130708
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Robert Muir commented on LUCENE-4405:
-------------------------------------
Maybe we should make a best effort to create all files with paranoid
protections (read only/system on windows, minimal permissions on unix) to
defeat such corrupters.
> java.lang.NumberFormatException: For input string: "4g3 (1)"
> ------------------------------------------------------------
>
> Key: LUCENE-4405
> URL: https://issues.apache.org/jira/browse/LUCENE-4405
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 3.5
> Environment: Windows 7 64 bit JDK
> Reporter: Radhakrishna Bhat
>
> When trying to instantiate IndexWriter, I get this exception. I have no other
> clues on why this might happen.
> Caused by: java.lang.NumberFormatException: For input string: "4g3 (1)"
> at
> java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
> at java.lang.Long.parseLong(Long.java:419)
> at
> org.apache.lucene.index.SegmentInfos.generationFromSegmentsFileName(SegmentInfos.java:214)
> at
> org.apache.lucene.index.SegmentInfos.getCurrentSegmentGeneration(SegmentInfos.java:149)
> at
> org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:626)
> at
> org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:575)
> at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:346)
> at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1115)
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