[HADOOP-8655] In TextInputFormat, while specifying textinputformat.record.delimiter the character/character sequences in data file similar to starting character/starting character sequence in delimiter were found missing in certain cases in the Map Output

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.20.2
• Fix Version/s: 2.0.2-alpha
• Component/s: util
• Labels: hadoop mapreduce textinputformat textinputformat.record.delimiter

Environment

Linux- Ubuntu 10.04

• Target Version/s: 2.0.2-alpha
• Tags: hadoop, mapreduce
• Assignee: Unassigned
• Reporter: Arun A K
• Created: 06/Aug/12 11:01
• Updated: 04/Sep/14 00:59
• Resolved: 23/Aug/12 17:00

Description

Set textinputformat.record.delimiter as "</entity>"

Suppose the input is a text file with the following content
<entity><id>1</id><name>User1</name></entity><entity><id>2</id><name>User2</name></entity><entity><id>3</id><name>User3</name></entity><entity><id>4</id><name>User4</name></entity><entity><id>5</id><name>User5</name></entity>

Mapper was expected to get value as

Value 1 - <entity><id>1</id><name>User1</name>
Value 2 - <entity><id>2</id><name>User2</name>
Value 3 - <entity><id>3</id><name>User3</name>
Value 4 - <entity><id>4</id><name>User4</name>
Value 5 - <entity><id>5</id><name>User5</name>

According to this bug Mapper gets value

Value 1 - entity><id>1</id><name>User1</name>
Value 2 - <entity>id>2</id><name>User2</name>
Value 3 - <entity><id>3id><name>User3</name>
Value 4 - <entity><id>4</id><name>User4name>
Value 5 - <entity><id>5</id><name>User5</name>

The pattern shown above need not occur for value 1,2,3 necessarily. The bug occurs at some random positions in the map input.