ruby daemon debug

issue: use start cannot start daemon and no error log
[root@FSWWW uploadfile]# ./upload_files_control.rb start


solution:
try to use run
[root@FSWWW uploadfile]# ./upload_files_control.rb run
upload_files.rb: process with pid 22303 started.
/opt/FS_QPID/PDF/uploadfile/upload_files.rb:16:in `initialize': No such file or
        from /opt/FS_QPID/PDF/uploadfile/upload_files.rb:16:in `open'
        from /opt/FS_QPID/PDF/uploadfile/upload_files.rb:16:in `initialize'
        from /opt/FS_QPID/PDF/uploadfile/upload_files.rb:101:in `new'
        from /opt/FS_QPID/PDF/uploadfile/upload_files.rb:101
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons/application.r
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons/application.r
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons/application.r
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons/controller.rb
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons.rb:147:in `ru
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons/cmdline.rb:10
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons/cmdline.rb:10
        from /usr/lib/ruby/gems/1.8/gems/daemons-1.1.9/lib/daemons.rb:146:in `ru
        from ./upload_files_control.rb:16