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From "Alan Woodward (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-3831) Passing a null fieldname to MemoryFields#terms in MemoryIndex throws a NPE
Date Tue, 28 Feb 2012 14:29:46 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alan Woodward updated LUCENE-3831:
----------------------------------

    Attachment: TestNullFieldAfterRegexpRewrite.java

Here's a test case.  The error is thrown in SpanQuery.createWeight() when it's called on a
bare SpanMultiTermQueryWrapper.

It looks as though a simple workaround is to always wrap SpanMultiTermQueryWrapper in a SpanOrQuery.
 

Maybe SpanOrQuery should not have a default constructor, but should require a fieldname if
no clauses are supplied?
                
> Passing a null fieldname to MemoryFields#terms in MemoryIndex throws a NPE
> --------------------------------------------------------------------------
>
>                 Key: LUCENE-3831
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3831
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 4.0
>            Reporter: Alan Woodward
>            Assignee: Michael McCandless
>            Priority: Minor
>         Attachments: TestNullFieldAfterRegexpRewrite.java, mindex-null-field.patch
>
>
> I found this when querying a MemoryIndex using a RegexpQuery wrapped by a SpanMultiTermQueryWrapper.
 If the regexp doesn't match anything in the index, it gets rewritten to an empty SpanOrQuery
with a null field value, which then triggers the NPE.

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