}
}
allTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
// set up secret manager
secretManager = new ClientToAMTokenSecretManager(appAttemptID, null);
// if not a secure cluster, extract the username -it will be
// propagated to workers
if (!UserGroupInformation.isSecurityEnabled()) {
hadoop_user_name = System.getenv(HADOOP_USER_NAME);