title: Kerberos tickets failing to renew through java code for long running jobs
body: <p>We are unable to renew kerberos user tickets from keytab using java code, while it's working with "kinit -R"</p>
  
  <p>code:</p>
  
  <p><strong>UserGroupInformation loginUser = UserGroupInformation.getLoginUser(); loginUser.checkTGTAndReloginFromKeytab();</strong></p>
  
  <p>Please help me out.</p>