Mailing-List: contact java-dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-dev@lucene.apache.org
Message-ID: <25730016.1164065284558.JavaMail.jira@brutus>
Date: Mon, 20 Nov 2006 15:28:04 -0800 (PST)
From: "Michael Busch (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Updated: (LUCENE-720) Unit tests TestBackwardsCompatibility
 and TestIndexFileDeleter might fail depending on JVM
In-Reply-To: <24077892.1164065282526.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit

     [ http://issues.apache.org/jira/browse/LUCENE-720?page=all ]

Michael Busch updated LUCENE-720:
---------------------------------

    Environment: Windows XP, IBM JVM 1.5 SP3

> Unit tests TestBackwardsCompatibility and TestIndexFileDeleter might fail depending on JVM
> ------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-720
>                 URL: http://issues.apache.org/jira/browse/LUCENE-720
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>    Affects Versions: 2.1
>         Environment: Windows XP, IBM JVM 1.5 SP3
>            Reporter: Michael Busch
>         Assigned To: Michael McCandless
>            Priority: Minor
>
> In the two units tests TestBackwardsCompatibility and TestIndexFileDeleter several index file names are hardcoded. For example, in TestBackwardsCompatibility.testExactFileNames() it is tested if the index directory contains exactly the expected files after several operations like addDocument(), deleteDocument() and setNorm() have been performed. Apparently the unit tests pass on the nightly build machine, but in my environment (Windows XP, IBM JVM 1.5) they fail for the following reason:
> When IndexReader.setNorm() is called a new norm file for the specified field is created with the file  ending .sx, where x is the number of the field. The problem is that the SegmentMerger can not guarantee to keep the order of the fields, in other words after a merge took place a field can have a different field number. This specific testcase fails, because it expects the file ending .s0, but the file has the ending .s1.
> The reason why the field numbers can be different on different JVMs is the use of HashSet in SegmentReader.getFieldNames(). Depending on the HashSet implementation an iterator might not iterate over the entries in insertion order. When I change HashSet to LinkedHashSet, the two testcases pass.
> However, even with a LinkedHashSet the order of the field numbers might change during a merge, because the order in which the SegmentMerger merges the FieldInfos depends on the field options like TERMVECTOR, INDEXED... (see SegmentMerger.mergeFields() for details). 
> So I think we should not use LinkedHashSet but rather change the problematic testcases. Furthermore I'm not sure if we should have hardcoded filenames in the tests anyway, because if we change the index format or file names in the future these test cases would fail without modification.

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org