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From "KuroSaka TeruHiko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-2645) False assertion of >0 position delta in StandardPostingsWriterImpl
Date Mon, 06 Jun 2011 16:06:59 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13044929#comment-13044929
] 

KuroSaka TeruHiko commented on LUCENE-2645:
-------------------------------------------

Thank you, Michael, for quick fix, and David, for initially reporting this bug and giving
me a credit :-)


> False assertion of >0 position delta in StandardPostingsWriterImpl
> ------------------------------------------------------------------
>
>                 Key: LUCENE-2645
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2645
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 4.0
>            Reporter: David Smiley
>            Assignee: Michael McCandless
>            Priority: Minor
>             Fix For: 4.0
>
>         Attachments: LuceneTrunkAssertErrorReproducer.java
>
>
> StandardPostingsWriterImpl line 159 is:
> {code:java}
>     assert delta > 0 || position == 0 || position == -1: "position=" + position +
" lastPosition=" + lastPosition;            // not quite right (if pos=0 is repeated twice
we don't catch it)
> {code}
> I enable assertions when I run my unit tests and I've found this assertion to fail when
delta is 0 which occurs when the same position value is sent in twice in arrow.  Once I added
RemoveDuplicatesTokenFilter, this problem went away.  Should I really be forced to add this
filter?  I think delta >= 0 would be a better assertion.

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