yes that is a great point to look at first and that would eliminate any jdbc related issues that may lead to such problems. Best regards ________________________________ From: Tim Whittington <t...@apache.org> Sent: Wednesday, April 13, 2022 9:17:44 PM To: java-user@lucene.apache.org <java-user@lucene.apache.org> Subject: Re: How to handle corrupt Lucene index
Thanks for this - I'll have a look at the database server code that is managing the Lucene indexes and see if I can track it down. Tim On Thu, 14 Apr 2022 at 12:41, Robert Muir <rcm...@gmail.com> wrote: > On Wed, Apr 13, 2022 at 8:24 PM Tim Whittington > <t...@whittington.nz.invalid> wrote: > > > > I'm working with/on a database system that uses Lucene for full text > > indexes (currently using 7.3.0). > > We're encountering occasional problems that occur after unclean shutdowns > > of the database , resulting in > > "org.apache.lucene.index.CorruptIndexException: file mismatch" errors > when > > the IndexWriter is constructed. > > > > In all of the cases this has occurred, CheckIndex finds no issues with > the > > Lucene index. > > > > The database has write-ahead-log and recovery facilities, so making the > > Lucene indexes durable wrt database operations is doable, but in this > case > > the IndexWriter itself is failing to initialise, so it looks like there > > needs to be a lower-level validation/recovery operation before > reconciling > > transactions can take place. > > > > Can anyone provide any advice about how the database can detect and > recover > > from this situation? > > > > File mismatch means files are getting mixed up. It is the equivalent > of swapping say, /etc/hosts and /etc/passwd on your computer. > > In your case you have a .si file (lets say it is named _79.si) that > really belongs to another segment (e.g. _42). > > This isn't a lucene issue, this is something else you must be using > that is "transporting files around", and it is mixing the files up. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
