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https://issues.apache.org/jira/browse/LUCENE-3624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-3624:
--------------------------------
Attachment: LUCENE-3624.patch
Here's a patch. I did the same for getArray() <-- don't call this if hasArray()
returns false or you get UOE, consistent with ByteBuffer.
Now if you try to merge a SlowMultiReaderWrapper, the error is more obvious:
{noformat}
[junit] java.lang.UnsupportedOperationException: asSortedSource is not
supported
[junit] at
org.apache.lucene.index.values.IndexDocValues$Source.asSortedSource(IndexDocValues.java:224)
[junit] at
org.apache.lucene.index.values.SortedBytesMergeUtils.buildSlices(SortedBytesMergeUtils.java:89)
[junit] at
org.apache.lucene.index.values.VarSortedBytesImpl$Writer.merge(VarSortedBytesImpl.java:68)
[junit] at
org.apache.lucene.index.codecs.PerDocConsumer.merge(PerDocConsumer.java:84)
[junit] at
org.apache.lucene.index.SegmentMerger.mergePerDoc(SegmentMerger.java:321)
[junit] at
org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:124)
[junit] at
org.apache.lucene.index.IndexWriter.addIndexes(IndexWriter.java:2429)
{noformat}
> Throw exception for "Multi-SortedSource" instead of returning null
> ------------------------------------------------------------------
>
> Key: LUCENE-3624
> URL: https://issues.apache.org/jira/browse/LUCENE-3624
> Project: Lucene - Java
> Issue Type: Task
> Reporter: Robert Muir
> Attachments: LUCENE-3624.patch
>
>
> Spinoff of LUCENE-3623: currently if you addIndexes(FIR) or similar, you get
> a NPE deep within codecs during merge.
> I think the NPE is confusing, it looks like a bug but a clearer exception
> would be an improvement.
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