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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2013/07/19 08:06:50 UTC
[jira] [Resolved] (LUCENE-5121) 4.4 RC0 can not read indexes
created with 4.2.1 using Disk based docvals
[ https://issues.apache.org/jira/browse/LUCENE-5121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Muir resolved LUCENE-5121.
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Resolution: Not A Problem
Currently (as documented), we don't provide index back compat for experimental codecs in lucene-codecs.jar.
Backwards compatibility is not free: I think supporting the official format is really all we can handle and still have maintainable code. But if we want to discuss expanding the backwards compatibility policy, lets do that on a mailing list thread.
> 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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