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define hdp-hadoop::hdfs::generate_exclude_file()
{
  $exlude_file_path = $configuration['hdfs-site']['dfs.hosts.exclude']
  ## Generate exclude file if exists value of $configuration['hdfs-exclude-file']['datanodes']
  ## or value for $configuration['hdfs-exclude-file']['datanodes'] is empty
  if (hdp_is_empty($configuration) == false and
    hdp_is_empty($configuration['hdfs-exclude-file']) == false) and
    (hdp_is_empty($configuration['hdfs-exclude-file']['datanodes']) == false)
    or has_key($configuration['hdfs-exclude-file'], 'datanodes') {
    ##Create file with list of excluding hosts
    $exlude_hosts_list = hdp_array_from_comma_list($configuration['hdfs-exclude-file']['datanodes'])
    file { $exlude_file_path :
      ensure => file,
      content => template('hdp-hadoop/exclude_hosts_list.erb')
    }
  }
}