1 Jul 2009 02:40
[jira] Created: (LUCENE-1727) Order of stored Fields not maintained
Hoss Man (JIRA <jira <at> apache.org>
2009-07-01 00:40:47 GMT
2009-07-01 00:40:47 GMT
Order of stored Fields not maintained
-------------------------------------
Key: LUCENE-1727
URL: https://issues.apache.org/jira/browse/LUCENE-1727
Project: Lucene - Java
Issue Type: Bug
Components: Index
Affects Versions: 2.4.1, 2.4
Reporter: Hoss Man
As noted in these threads...
http://www.nabble.com/Order-of-fields-returned-by-Document.getFields%28%29-to21034652.html
http://www.nabble.com/Order-of-fields-within-a-Document-in-Lucene-2.4%2B-to24210597.html
somewhere prior to Lucene 2.4.1 a change was introduced that prevents the Stored fields of a Document from
being returned in same order that they were originally added in. This can cause serious performance
problems for people attempting to use LoadFirstFieldSelector or a custom FieldSelector with the
LOAD_AND_BREAK, or the SIZE_AND_BREAK options (since the fields don't come back in the order they expect)
Speculation in the email threads is that the origin of this bug is code introduced by LUCENE-1301 -- but the
purpose of that issue was refactoring, so if it really is the cause of the change this would seem to be a bug,
and not a side affect of a conscious implementation change.
Someone who understands indexing internals should investigate this. At a minimum, if it's decided that
this is not actual a bug, then prior to resolving this bug the wiki docs and some of the FIeldSelector
javadocs should be updated to make it clear what order Fields will be returned in.
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