[HADOOP-11199] Configuration should be able to set empty value for property

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: conf
• Assignee: Unassigned
• Reporter: Wangda Tan
• Created: 13/Oct/14 23:58
• Updated: 09/Mar/15 15:44
• Resolved: 09/Mar/15 15:44

Description

Currently in hadoop.common.conf.Configuration, when you specify a XML like this:

<configuration>
  <property>
    <name>conf.name</name>
    <value></value>
  </property>
</configuration>

When you trying to get the conf.name, the returned value is null instead of an empty string.

Test code for this,

import java.io.ByteArrayInputStream;

import org.apache.hadoop.conf.Configuration;


public class HadoopConfigurationEmptyTest {
  public static void main(String[] args) {
    Configuration conf = new Configuration(false);
    ByteArrayInputStream bais =
        new ByteArrayInputStream(("<configuration><property>"
            + "<name>conf.name</name>" + "<value></value>"
            + "</property></configuration>").getBytes());
    conf.addResource(bais);
    System.out.println(conf.get("conf.name"));
  }
}

Does this intentionally or a behavior should be fixed?

Issue Links

• is duplicated by: HADOOP-6228 Configuration should allow storage of null values.