# File src/ruby_supportlib/phusion_passenger/utils/unseekable_socket.rb, line 49
      def wrap(socket)
        # Some people report that sometimes their Ruby (MRI/REE)
        # processes get stuck with 100% CPU usage. Upon further
        # inspection with strace, it turns out that these Ruby
        # processes are continuously calling lseek() on a socket,
        # which of course returns ESPIPE as error. gdb reveals
        # lseek() is called by fwrite(), which in turn is called
        # by rb_fwrite(). The affected socket is the
        # AbstractRequestHandler client socket.
        #
        # I inspected the MRI source code and didn't find
        # anything that would explain this behavior. This makes
        # me think that it's a glibc bug, but that's very
        # unlikely.
        #
        # The rb_fwrite() implementation takes an entirely
        # different code path if I set 'sync' to true: it will
        # skip fwrite() and use write() instead. So here we set
        # 'sync' to true in the hope that this will work around
        # the problem.
        socket.sync = true

        # There's no need to set the encoding for Ruby 1.9 because
        # abstract_request_handler.rb is tagged with 'encoding: binary'.

        @socket = socket

        return self
      end