commit 6002c510113d9a6aa87159c7386f2a8a4747405b
author Jesus Camacho Rodriguez <jcamacho@apache.org> Wed Nov 20 12:55:15 2019 -0800
committer Jesus Camacho Rodriguez <jcamacho@apache.org> Wed Nov 20 13:00:07 2019 -0800
tree 23932171083e226849f258af34d3704293e02071
parent 9bcdb5441e0e489f69168a22081444522f1d2d2d

HIVE-22480: IndexOutOfBounds exception while reading ORC files written with empty positions list in first row index entry (Jesus Camacho Rodriguez, reviewed by Prasanth Jayachandran)

ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderUtils.java

diff --git a/ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderUtils.java b/ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderUtils.java
index ded3979..8af836f 100644
--- a/ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderUtils.java
+++ b/ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderUtils.java
@@ -87,7 +87,7 @@ static void addRgFilteredStreamToRanges(OrcProto.Stream stream,
       if (!includedRowGroups[group]) continue;
       int posn = getIndexPosition(
           encoding.getKind(), type.getKind(), stream.getKind(), isCompressed, hasNull);
-      long start = index.getEntry(group).getPositions(posn);
+      long start = group == 0 ? 0 : index.getEntry(group).getPositions(posn);
       final long nextGroupOffset;
       boolean isLast = group == (includedRowGroups.length - 1);
       nextGroupOffset = isLast ? length : index.getEntry(group + 1).getPositions(posn);