...or a JVM bug. We have seen those around PagedBytes in the past. What Java version?
----- Uwe Schindler Achterdiek 19, D-28357 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Trejkaz [mailto:trej...@trypticon.org] > Sent: Monday, January 16, 2017 11:27 PM > To: Lucene Users Mailing List <java-user@lucene.apache.org> > Subject: Weird corruption symptom, not making sense > > I have this thing where our UninvertingReader is getting an > ArrayIndexOutOfBoundsException in production. I'm sure the index is > corrupt, but I tried investigating the code and it still seems a bit > odd. > > Caused by: java.lang.ArrayIndexOutOfBoundsException: -48116 > at org.apache.lucene.util.PagedBytes$Reader.fill(PagedBytes.java:118) > at OurFieldCacheImpl.BinaryDocValuesImpl.get(SourceFile:844) > > In BinaryDocValuesImpl : > > return new BinaryDocValues() > { > @Override > public BytesRef get(int docID) > { > int pointer = (int) docToOffset.get(docID); > if (pointer == 0) { > term.length = 0; > } else { > bytes.fill(term, pointer); > } > return term; > } > }; > > So "pointer" is the negative value presumably? Implying that somehow a > negative value got into the docToOffset mappings. > The value it's putting in comes from: > > long pointer = bytes.copyUsingLengthPrefix(term); > postingsEnum = termsEnum.postings(postingsEnum, > PostingsEnum.NONE); > while (true) { > int docID = postingsEnum.nextDoc(); > if (docID == DocIdSetIterator.NO_MORE_DOCS) { > break; > } > docToOffset.set(docID, pointer); > } > > So it seems like bytes.copyUsingLengthPrefix can return a negative > value? But I looked in PagedBytes and couldn't see an obvious way to > get a negative value. > > Is it possible some kind of overflow is happening here? > > TX > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
