[ https://issues.apache.org/jira/browse/LUCENE-2769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-2769:
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Attachment: LUCENE-2769_SegmentMerger.patch
Here a new SegmentMerger now working only on atomic readers. All "normal" tests pass, but
it seems that addIndexesWithThreads fails during merging term vectors. This is not clear,
all other tests pass and the created indexes are fine.
Mike: Do you understand that? The problem seems to be some thread safety issue in addIndexes(IndexReader...).
Not sure who changes who's internal structures? Maybe suddenly subreaders change?
> FilterIndexReader in trunk does not implement getSequentialSubReaders() correctly
> ---------------------------------------------------------------------------------
>
> Key: LUCENE-2769
> URL: https://issues.apache.org/jira/browse/LUCENE-2769
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Uwe Schindler
> Attachments: LUCENE-2769.patch, LUCENE-2769.patch, LUCENE-2769_norms.patch, LUCENE-2769_norms.patch,
LUCENE-2769_norms.patch, LUCENE-2769_SegmentMerger.patch, LUCENE-2769_SegmentMerger.patch
>
>
> Since LUCENE-2459, getSequentialSubReaders() in FilterIndexReader returns null, so it
returns an atomic reader. But If you call then any of the enum methods, it throws Exception
because the underlying reader is not atomic.
> We should move the null-returning method to SlowMultiReaderWrapper and fix FilterIndexReader's
default to return in.getSequentialSubReaders(). Ideally an implementation must of course also
wrap the sub-readers.
> If we change this we have to look into other Impls like the MultiPassIndexSplitter if
we need to add atomicity.
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