File descriptor of child higher than MAX_FD

warning: File descriptor 180 of child 34996634 higher than MAX_FD, check for defunct children

bundle agent client_get ( bla )
{
    vars:
         "download_dir" string => "/var/cfengine/mylogs";
         'lastseen'      slist => { hostsseen( "2", "lastseen", "name" ) };
         'clients'       slist => { "${sys.policy_hub}", "@{lastseen}" };    methods:
       "file_get"
         usebundle => bg_get ( "${download_dir}", "${clients}" ),
         comment   => "backgrounding agents for parallelization",
         action    => bg( "5", "5" );
}

bundle agent bg_get( download_dir, clients )
{
   vars:
      "file_to_get" string => "dummy.log";   
   files:
      "$(download_dir)/${clients}.log"
         classes     => if_repaired("downloaded_data_for_${clients}"),
         perms       => m( "644" ),
         copy_from   => remote_dcp( "file_to_get", "$(clients)");}