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https://issues.apache.org/jira/browse/LUCENE-4405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130644#comment-14130644
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Sam Davis commented on LUCENE-4405:
-----------------------------------
We are using Lucene in the Eclipse Mylyn project and have had some users report
errors like this because tools like MS OneDrive created files with names not
matching the expected format. It would be better to throw a
CorruptIndexException in this case.
> 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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