[LUCENE-5121] 4.4 RC0 can not read indexes created with 4.2.1 using Disk based docvals

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Not A Problem
• Fix Version/s: 4.4
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Chris M. Hostetter
• Created: 18/Jul/13 22:57
• Updated: 28/Aug/22 13:50
• Resolved: 19/Jul/13 06:05

Description

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