IsNameNodeActiveServlet (Apache Hadoop HDFS 3.5.0 API)
Description: declaration: package: org.apache.hadoop.hdfs.server.namenode, class: IsNameNodeActiveServlet

Package org.apache.hadoop.hdfs.server.namenode

# Class IsNameNodeActiveServlet

java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
org.apache.hadoop.http.IsActiveServlet
org.apache.hadoop.hdfs.server.namenode.IsNameNodeActiveServlet

All Implemented Interfaces:
  `Serializable`, `javax.servlet.Servlet`, `javax.servlet.ServletConfig`

public class IsNameNodeActiveServlet extends org.apache.hadoop.http.IsActiveServlet
Used by Load Balancers to find the active NameNode.

See Also:
  - Serialized Form

- ## Field Summary

  ### Fields inherited from class org.apache.hadoop.http.IsActiveServlet

  `PATH_SPEC, RESPONSE_ACTIVE, RESPONSE_NOT_ACTIVE, SERVLET_NAME`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `IsNameNodeActiveServlet()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected boolean`
  `isActive()`

  ### Methods inherited from class org.apache.hadoop.http.IsActiveServlet

  `doGet`

  ### Methods inherited from class javax.servlet.http.HttpServlet

  `doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service`

  ### Methods inherited from class javax.servlet.GenericServlet

  `destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### IsNameNodeActiveServlet

    public IsNameNodeActiveServlet()

- ## Method Details

  - ### isActive

    protected boolean isActive()
    Specified by:
      `isActive` in class `org.apache.hadoop.http.IsActiveServlet`