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https://issues.apache.org/jira/browse/LUCENE-846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483738
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Steven Parkes commented on LUCENE-846:
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Dang. It used to fail but I've made some updates since then that would change
the merge policy (fancy that) and it's no longer happening.
Let me see if I have a snapshot lying around that has the old code where it
still happens.
[As as aside, I've been thinking of looking into svk or brz (or whatever its
called) that would allow me to version control stuff without it going into svn.
All of a sudden I can see why the linux folks like distributed version control
...]
> IOExeception can cause loss of data due to premature segment deletion
> ---------------------------------------------------------------------
>
> Key: LUCENE-846
> URL: https://issues.apache.org/jira/browse/LUCENE-846
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Reporter: Steven Parkes
> Assigned To: Michael McCandless
>
> If you hit an IOException, e.g., disk full, while making a cfs from its
> constituent parts, you may not be able to rollback to the before-merge
> process. This happens via addIndexes.
> I don't have a nice easy test for this; generating IOEs ain't so easy. But it
> does happen in the patch for the factored merge policy with the existing
> tests because the pseudo-randomly generated IOEs fall in a different place.
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