Can not modify log monitoring settings when host node is set scheduling=false

[unakatsuo]

hva.log

2015-03-10 16:26:56 JobContext thr=JobWorker[0/1] [INFO]: Job start 78f281bc72e9ce4b46cdf262c4dc7354650492c2 (Local ID: 78f281bc72e9ce4b46cdf262c4dc7354650492c2)[ delete_alarm ]
2015-03-10 16:26:56 JobContext thr=JobWorker[0/1] [ERROR]: Job failed 78f281bc72e9ce4b46cdf262c4dc7354650492c2 [ delete_alarm ]: {:message=>"undefined method `instances' for nil:NilClass", :error_type=>"NoMethodError"}
2015-03-10 16:26:56 JobContext thr=JobWorker[0/1] [ERROR]: Caught Isono::NodeModules::RpcChannel::RpcError: {:message=>"undefined method `instances' for nil:NilClass", :error_type=>"NoMethodError"}
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/node_modules/rpc_channel.rb:459:in `wait'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/node_modules/rpc_channel.rb:153:in `request'
        /opt/axsh/wakame-vdc/dcmgr/lib/dcmgr/node_modules/alarm_config_updater.rb:42:in `get_alarms'
        /opt/axsh/wakame-vdc/dcmgr/lib/dcmgr/node_modules/alarm_config_updater.rb:29:in `delete_alarm'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/rack/object_method.rb:15:in `call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/rack/object_method.rb:15:in `call'
        /opt/axsh/wakame-vdc/dcmgr/lib/dcmgr/node_modules/alarm_config_updater.rb:15:in `block (3 levels) in <class:AlarmConfigUpdater>'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/rack/map.rb:52:in `call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/rack/map.rb:52:in `call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/rack/builder.rb:36:in `call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/rack/job.rb:59:in `block (2 levels) in call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/node_modules/job_worker.rb:67:in `call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/node_modules/job_worker.rb:67:in `block in start'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/thread_pool.rb:32:in `call'
        /opt/axsh/wakame-vdc/dcmgr/vendor/bundle/ruby/2.0.0/gems/isono-0.2.19/lib/isono/thread_pool.rb:32:in `block (2 levels) in initialize'