Problem in resque: job not getting removed from queue when finished processing


I am using resque, and resque-scheduler in my rails application. I am
facing strange problem in using resque-scheduler. One of my job is not getting removed from queue, once it finishes with the ‘perform’ method. I
need to kill it explicitly to get out of the queue, then other jobs in the queue starts executing.

Job class is simple, like:

                    class FooJob
                      @queue = :high_volume

                      def self.perform
                        puts "FooJob#perform:"
                        # some method call

And resque_schedule.yml contains:

                      cron: "15 * * * *"
                      class: FooJob
                      description: "enqueue jobs from Foo"

Can it be problem with gem versions or memory issue? or any other?

Thanks in advance for any pointers