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From "Sascha Janz" <Sascha.J...@gmx.net>
Subject trouble with Collector and FieldCache
Date Wed, 14 Jan 2015 14:07:09 GMT

hello,
 
i am using lucene 4.6.  in my query i use a collector to get field values.
 
setNextReader is implemented as below.
 
public void setNextReader(AtomicReaderContext context) throws IOException {

cacheIDs = FieldCache.DEFAULT.getInts(context.reader(),	"id", true); 
}

and collect 

public void collect(int docnr) throws IOException {
		int id = 0;
		id = cacheIDs .get(docnr);
                    ...

 
} 

But sometimes i got an exception like 

2015-01-12 13:32:49,342 [ID:1e8e1dff-9a57-11e4-a697-c29020524153]ERROR (org.apache.lucene.search.join.Collector)
- Error getInts
java.lang.ArrayIndexOutOfBoundsException: 0
	at org.apache.lucene.util.NumericUtils.getPrefixCodedIntShift(NumericUtils.java:208)
	at org.apache.lucene.util.NumericUtils$2.accept(NumericUtils.java:493)
	at org.apache.lucene.index.FilteredTermsEnum.next(FilteredTermsEnum.java:241)
	at org.apache.lucene.search.FieldCacheImpl$Uninvert.uninvert(FieldCacheImpl.java:307)
	at org.apache.lucene.search.FieldCacheImpl$IntCache.createValue(FieldCacheImpl.java:678)
	at org.apache.lucene.search.FieldCacheImpl$Cache.get(FieldCacheImpl.java:211)
	at org.apache.lucene.search.FieldCacheImpl.getInts(FieldCacheImpl.java:570)
	at org.apache.lucene.search.FieldCacheImpl$IntCache.createValue(FieldCacheImpl.java:631)
	at org.apache.lucene.search.FieldCacheImpl$Cache.get(FieldCacheImpl.java:211)
	at org.apache.lucene.search.FieldCacheImpl.getInts(FieldCacheImpl.java:570)
	at org.apache.lucene.search.FieldCacheImpl.getInts(FieldCacheImpl.java:545)
	at org.apache.lucene.search.join.MyCollector.setNextReader(MyCollector.java:264)


when i try to get the field the normal way like this 

	Document doc = reader.document(docnr);
	String sid = doc.get("id");
          int id = Integer.parseInt(sid);

everything is fine. 

am i doing something wrong?

regards 
Sascha

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