losipiuk commented on a change in pull request #2040:
URL: https://github.com/apache/hive/pull/2040#discussion_r589397896



##########
File path: 
ql/src/java/org/apache/hadoop/hive/ql/io/avro/AvroGenericRecordReader.java
##########
@@ -88,22 +88,38 @@ public AvroGenericRecordReader(JobConf job, FileSplit 
split, Reporter reporter)
       gdr.setExpected(latest);
     }
 
-    if (split.getLength() == 0) {
-      this.isEmptyInput = true;
-      this.start = 0;
-      this.reader = null;
+    org.apache.avro.file.FileReader<GenericRecord> nonFinalReader = null;
+    try {
+      if (split.getLength() == 0) {
+        this.isEmptyInput = true;
+        this.start = 0;
+        this.reader = null;
+      } else {
+        this.isEmptyInput = false;
+        nonFinalReader = new DataFileReader<GenericRecord>(new 
FsInput(split.getPath(), job), gdr);
+        this.reader = nonFinalReader;
+        this.reader.sync(split.getStart());
+        this.start = reader.tell();

Review comment:
       Sure. That would work. If you prefer to split two `if..else` but not 
have the extra variable, I can change. Should I.

##########
File path: 
ql/src/java/org/apache/hadoop/hive/ql/io/avro/AvroGenericRecordReader.java
##########
@@ -88,22 +88,38 @@ public AvroGenericRecordReader(JobConf job, FileSplit 
split, Reporter reporter)
       gdr.setExpected(latest);
     }
 
-    if (split.getLength() == 0) {
-      this.isEmptyInput = true;
-      this.start = 0;
-      this.reader = null;
+    org.apache.avro.file.FileReader<GenericRecord> nonFinalReader = null;
+    try {
+      if (split.getLength() == 0) {
+        this.isEmptyInput = true;
+        this.start = 0;
+        this.reader = null;
+      } else {
+        this.isEmptyInput = false;
+        nonFinalReader = new DataFileReader<GenericRecord>(new 
FsInput(split.getPath(), job), gdr);
+        this.reader = nonFinalReader;
+        this.reader.sync(split.getStart());
+        this.start = reader.tell();

Review comment:
       Sure. That would work. If you prefer to split two `if..else` but not 
have the extra variable, I can change. Should I?




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