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https://issues.apache.org/jira/browse/LUCENE-1542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-1542:
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Attachment: LUCENE-1542.patch
New patch attached, that merges in Mark's test & fix, and the original
spans test (converted to a unit test) from LUCENE-1465, and adds
a method to IndexWriter to emulate the buggy behavior.
Previously, in LUCENE-1255, this problem was just an "oddity" that
Lucene would record position -1 for the first token(s) if those tokens
all have position incrment 0. We started to fix it, realized it
breaks back-compat, and reverted it (accepting the "oddity").
Now, for this issue we are realizing the problem is much worse if a
payload happens to be attached to such tokens: instead of -1, the
position now comes back as Integer.MAX_VALUE (a side effect of how
payloads are stored in the index, which require that position delta be
non-zero), which then messes up *SpanQuery and I'm sure other things.
Subsequent tokens (once posIncr is > 0) then overflow int, and switch
to MIN_VALUE.
I think this is a real and nasty bug, and we should fix it, despite
back-compat.
So in the patch, I've added deprecated
IndexWriter.setAllowMinus1Postion() to get back to the buggy
behaviour, if for some reason an application needs this, and then
fixed the bug by default.
> Lucene can incorrectly set the position of tokens that start a field with
> positonInc 0.
> ---------------------------------------------------------------------------------------
>
> Key: LUCENE-1542
> URL: https://issues.apache.org/jira/browse/LUCENE-1542
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.4
> Reporter: Mark Miller
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1542.patch, LUCENE-1542.patch, LUCENE-1542.patch
>
>
> More info in LUCENE-1465
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