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Date: Mon, 17 Oct 2011 12:24:10 +0000 (UTC)
From: "Shai Erera (Commented) (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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Subject: [jira] [Commented] (LUCENE-3522) TermsFilter.getDocIdSet(context)
 NPE on missing field
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    [ https://issues.apache.org/jira/browse/LUCENE-3522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128812#comment-13128812 ] 

Shai Erera commented on LUCENE-3522:
------------------------------------

Good catch Dan!

Patch looks good, but I have some comments about the test:
# You don't close the directories at the end of it, and the test fails due that.
# I think it can be simplified to create just one Directory, with "f1:content" and request "f2:content". I actually tried it and the test still fails (NPE reproduced without your fix).

Here is the modified, more compact, test:
{code}
  public void testMissingField() throws Exception {
    // LUCENE-3522: if requested field does not exist in the index, TermsFilter threw NPE.
    Directory dir = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random, dir);
    Document doc = new Document();
    doc.add(newField("f1", "content", StringField.TYPE_STORED));
    writer.addDocument(doc);
    IndexReader reader = writer.getReader();
    writer.close();
    
    TermsFilter tf = new TermsFilter();
    tf.addTerm(new Term("f2", "content"));
    
    FixedBitSet bits = (FixedBitSet) tf.getDocIdSet(reader.getTopReaderContext().leaves()[0]);
    assertTrue("Must be >= 0", bits.cardinality() >= 0);      
    reader.close();
    dir.close();
  }
{code}

Would you mind changing the test case to this compact one? Or did you want to demonstrate something else with the two readers?
                
> TermsFilter.getDocIdSet(context) NPE on missing field
> -----------------------------------------------------
>
>                 Key: LUCENE-3522
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3522
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: modules/other
>    Affects Versions: 4.0
>            Reporter: Dan Climan
>            Assignee: Michael McCandless
>            Priority: Minor
>         Attachments: LUCENE-3522.patch
>
>
> If the context does not contain the field for a term when calling TermsFilter.getDocIdSet(AtomicReaderContext context) then a NullPointerException is thrown due to not checking for null Terms before getting iterator.

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