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:

  • 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