[ http://issues.apache.org/jira/browse/LUCENE-561?page=all ]
Chuck Williams updated LUCENE-561:
----------------------------------
Attachment: ParallelReaderBugs.patch
This new version of the patch provides a more general solution for the unknown
field NPE problem (the solution for the delete problem is the same and is
included in the new patch file).
For the NPE problem, the new patch handles the case of an unknown field
explicitly in all ParallelReader API's for which it is relevant. This is quite
a few of them, but I think I got them all.
The first solution of specifying the field list for each reader was expedient
in my applicaiton since all fields are pre-configured and validated on index
operations. However, for Lucene in general such field processing is not
required. E.g., with ParallelReader as it is in Lucene now and with the first
version of the patch, a user-entered misspelled field name passed in a Query to
search() generates an NPE instead of zero results. With the new version of the
patch, zero resutls are returned properly.
> ParallelReader fails on deletes and on seeks of previously unused fields
> ------------------------------------------------------------------------
>
> Key: LUCENE-561
> URL: http://issues.apache.org/jira/browse/LUCENE-561
> Project: Lucene - Java
> Type: Bug
> Components: Index
> Versions: 2.0
> Environment: All
> Reporter: Chuck Williams
> Attachments: ParallelReaderBugs.patch, ParallelReaderBugs.patch
>
> In using ParallelReader I've hit two bugs:
> 1. ParallelReader.doDelete() and doUndeleteAll() call doDelete() and
> doUndeleteAll() on the subreaders, but these methods do not set hasChanges.
> Thus the changes are lost when the readers are closed. The fix is to call
> deleteDocument() and undeleteAll() on the subreaders instead.
> 2. ParallelReader discovers the fields in each subindex by using
> IndexReader.getFieldNames() which only finds fields that have occurred on at
> least one document. In general a parallel index is designed with assignments
> of fields to sub-indexes and term seeks (including searches) may be done on
> any of those fields, even if no documents in a particular state of the index
> have yet had an assigned field. Seeks/searches on fields that have not yet
> been indexed generated an NPE in ParallelReader's various inner class seek()
> and next() methods because fieldToReader.get() returns null on the unseen
> field. The fix is to extend the add() methods to supply the correct list of
> fields for each subindex.
> Patch that corrects both of these issues attached.
--
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: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
