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https://issues.apache.org/jira/browse/LUCENE-5121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713055#comment-13713055
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Hoss Man commented on LUCENE-5121:
----------------------------------
FWIW, the original stack trace reported by the user on IRC...
{noformat}
Caused by: org.apache.lucene.index.CorruptIndexException: invalid type: 65,
resource=MMapIndexInput(path="/storage/solrdata/index/_fd_Disk_0.dvdm")
at
org.apache.lucene.codecs.diskdv.DiskDocValuesProducer.readFields(DiskDocValuesProducer.java:159)
at
org.apache.lucene.codecs.diskdv.DiskDocValuesProducer.<init>(DiskDocValuesProducer.java:72)
at
org.apache.lucene.codecs.diskdv.DiskDocValuesFormat.fieldsProducer(DiskDocValuesFormat.java:49)
at
org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsReader.<init>(PerFieldDocValuesFormat.java:213)
at
org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat.fieldsProducer(PerFieldDocValuesFormat.java:282)
at
org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:134)
at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:56)
at
org.apache.lucene.index.StandardDirectoryReader$1.doBody(StandardDirectoryReader.java:62)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:812)
at
org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:52)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:88)
at
org.apache.solr.core.StandardIndexReaderFactory.newReader(StandardIndexReaderFactory.java:34)
at
org.apache.solr.search.SolrIndexSearcher.getReader(SolrIndexSearcher.java:174)
... 18 more
{noformat}
> 4.4 RC0 can not read indexes created with 4.2.1 using Disk based docvals
> ------------------------------------------------------------------------
>
> Key: LUCENE-5121
> URL: https://issues.apache.org/jira/browse/LUCENE-5121
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Hoss Man
> Priority: Blocker
> Fix For: 4.4
>
> Attachments: disk_docvals_bug.tgz
>
>
> On the #solr irc channel, user adityab reported a problem trying to upgrade
> an existing solr instance from 4.2.1 to the 4.4 RC0 code. The specific error
> he reported was a "CorruptIndexException: invalid type: 65" from
> DiskDocValuesProducer.readFields using an MMapIndexInput. While waiting for
> more details from adityab on reproducible configs, i attempted to do a
> trivial test using simple solr configs based on the docvals test configs, and
> was able to trigger a slightly different error in which
> DiskDocValuesProducer.readFields caused an EOFException.
> The problem reproduces on both solr init, and when using CheckIndex --
> details to reproduce to follow in an attachment/comment
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