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https://issues.apache.org/jira/browse/LUCENE-4975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera updated LUCENE-4975:
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Attachment: LUCENE-4975.patch
Mike tripped a seed which was reproducible only on Linux which uncovered a bug
in the handlers -- writing the segments.gen file should be done only after
updateHandlerState() is called, and from what the handler says is its last
state. Otherwise, we could write segments.gen w/ gen=7, but "kissing" the
index, or updating the state (reading commits) trips an error, the handler is
reset back to the last revision it knows is good, and we end up w/ a
segments.gen file from the future. This then causes DirReader.open to fail w/
FNFE looking for a futuristic segments_N file.
MockDirWrapper is a nasty bitch. It should be called
WhackoIOSubSystemDirectory! :)
Patch improves the handlers + make the tests more resilient so they don't enter
an infinite loop (that's part of what Mike hit).
I'm beasting more. Please review the handlers' segments.gen writing logic.
> Add Replication module to Lucene
> --------------------------------
>
> Key: LUCENE-4975
> URL: https://issues.apache.org/jira/browse/LUCENE-4975
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-4975.patch, LUCENE-4975.patch, LUCENE-4975.patch,
> LUCENE-4975.patch, LUCENE-4975.patch, LUCENE-4975.patch, LUCENE-4975.patch,
> LUCENE-4975.patch, LUCENE-4975.patch, LUCENE-4975.patch, LUCENE-4975.patch
>
>
> I wrote a replication module which I think will be useful to Lucene users who
> want to replicate their indexes for e.g high-availability, taking hot backups
> etc.
> I will upload a patch soon where I'll describe in general how it works.
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