[Backgroundrb-devel] Getting started

Richard Everhart rich.everhart at gmail.com
Thu Feb 14 17:45:17 EST 2008


Thanks, Hemant.  I made the change related to the job key and I'm not
getting a value back from new_worker.  However, the 'not able to
connect error' is on going.

My zipped up app is attached.  Thanks for helping me out.

Rich

On Wed, Feb 13, 2008 at 1:46 AM, hemant kumar <gethemant at gmail.com> wrote:
> Hi,
>
>
>
>  On Tue, 2008-02-12 at 22:47 -0800, Richard Everhart wrote:
>  > On Feb 12, 2008 6:02 PM, hemant <gethemant at gmail.com> wrote:
>  > >
>  > > On Wed, Feb 13, 2008 at 7:19 AM, Richard Everhart
>  > > <rich.everhart at gmail.com> wrote:
>  > > >
>  > > > I upgraded ruby right before I wrote my original message and that was
>  > > >  causing some problems.  That's fixed but I still get the 'Not able to
>  > > >  connect' error.  In backgroundrb_server.log there seem to really be
>  > > >  two errors:
>  > > >
>  > > >  /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
>  > > >  `gem_original_require': no such file to load --  (LoadError)
>  > > >        from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
>  > > >  `require'
>  > > >        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in
>  > > >  `require'
>  > > >        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in
>  > > >  `new_constants_in'
>  > > >        from /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in
>  > > >  `require'
>  > > >        from /home/reverhart/drb_test/vendor/plugins/backgroundrb/framework/packet_master.rb:113:in
>  > > >  `start_worker'
>  > > >  [...snip...]
>  > > >  /home/reverhart/drb_test/vendor/plugins/backgroundrb/lib/../framework/nbio.rb:24:in
>  > > >  `read_data': Packet::DisconnectError (Packet::DisconnectError)
>  > > >        from /home/reverhart/drb_test/vendor/plugins/backgroundrb/framework/worker.rb:47:in
>  > > >  `handle_internal_messages'
>  > > >        from /home/reverhart/drb_test/vendor/plugins/backgroundrb/framework/core.rb:154:in
>  > > >  `start_reactor'
>  > > >  [...snip...]
>  > > >
>  > > >  The first error seems to be due to a ruby and/or rails configuration
>  > > >  error.  However, I've seen this error before, and the '--' in the
>  > > >  error message is usually followed by the name of the file that can't
>  > > >  be loaded.
>  > > >
>  > >
>  > > Did you define a worker before starting backgroundrb server? Above
>  > > error is because, bdrb is not able to load defined worker.
>  > > If you have the worker defined can we see the code of the worker.
>  > >
>  >
>  > Here is my controller and worker:
>  >
>  > class TestdrbController < ApplicationController
>  >   def do_fib
>  >     puts ">>> do_fib: #{params[:input]}"
>  >
>  >     session[:job_key] = MiddleMan.new_worker(:class =>
>  > :fibonacci_worker, :data => params[:input])
>  >
>  >     puts "Job key: #{session[:job_key]}"
>  >
>  >     MiddleMan.send_request(:worker => :fibonacci_worker,
>  > :worker_method => :do_work, :data => params[:input])
>  >
>  >     puts "<<< do_fib"
>  >
>  >     render :action => 'result'
>  >   end
>  >
>  >   def result
>  >     puts ">>> result"
>  >     MiddleMan.delete_worker(:worker => :fibonacci_worker, :job_key =>
>  > session[:job_key])
>  >     puts "<<< result"
>  >   end
>  > end
>
>  Although this is not related to your problem, but above controller code
>  has a bit of a problem, when you are not passing any job_key while
>  starting the worker via new_worker method, no job_key will be used and
>  while deleting the worker or invoking a task on the worker you should
>  not use job_key, if you haven't specified a job_key while creating the
>  worker.
>
>
>  >
>  > class FibonacciWorker < BackgrounDRb::MetaWorker
>  >   include Fibonacci
>  >
>  >   set_worker_name :fibonacci_worker
>  >   set_no_auto_load true
>  >
>  >   def create(args = nil)
>  >     logger.info("Worker create: '#{args}'")
>  >
>  >     register_status("Processing started")
>  >
>  >     n = args.to_i
>  >     logger.info("Worker result: #{f(n)}")
>  >   end
>  >
>  >   def do_work(data)
>  >     logger.info ">>> do_work"
>  >
>  >     result = f(data.to_i)
>  >     logger.info "Worker result: #{result}"
>  >
>  >     return result
>  >   end
>  > end
>
>  I took above worker code and created new rails application, checked out
>  bdrb code from trunk at devjavu and i was able to start bdrb without
>  problems. In a nutshell, I am unable to reproduce this problem. Now, can
>  you zip and send me your application through mail, so as I can see whats
>  wrong there?
>
>
>
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