weird error from nodejitsu haibu

errorjitsuemai.js

{ stack:
   [ 'Error: channel closed',
     '    at process.target.send (child_process.js:336:26)',
     '    at EventEmitter.<anonymous> (/opt/haibu/carapace-versions/0.8.19/node_modules/haibu-carapace/lib/carapace.js:29:14)',
     '    at EventEmitter.emit (/opt/haibu/carapace-versions/0.8.19/node_modules/haibu-carapace/node_modules/eventemitter2/lib/eventemitter2.js:271:22)',
     '    at carapace.run (/opt/haibu/carapace-versions/0.8.19/node_modules/haibu-carapace/lib/carapace.js:174:14)',
     '    at process.startup.processNextTick.process._tickCallback (node.js:244:9)',
     [length]: 6 ],
  date: 'Sun Aug 18 2013 01:11:58 GMT+0000 (UTC)',
  process:
   { argv:
      [ '/opt/haibu/node-versions/0.8.19/bin/node',
        '/opt/haibu/apps/ubntjoey/ubnt-jobs/package/index.js',
        [length]: 2 ],
     pid: 94384,
     cwd: '/opt/haibu/apps/ubntjoey/ubnt-jobs/package',
     version: 'v0.8.19',
     uid: 159,
     gid: 0,
     memoryUsage: { heapUsed: 29161552, rss: 58093568, heapTotal: 59211008 },
     execPath: '/opt/haibu/node-versions/0.8.19/bin/node' },
  os:
   { uptime: 60516,
     loadavg: [ 1.2890625, 1.22265625, 1.22265625, [length]: 3 ] },


  trace:
   [ { function: 'process.target.send',
       file: 'child_process.js',
       method: 'target.send',
       column: 26,
       native: false,
       line: 336 },
     { function: '',
       file: '/opt/haibu/carapace-versions/0.8.19/node_modules/haibu-carapace/lib/carapace.js',
       method: null,
       column: 14,
       native: false,
       line: 29 },
     { function: 'EventEmitter.emit',
       file: '/opt/haibu/carapace-versions/0.8.19/node_modules/haibu-carapace/node_modules/eventemitter2/lib/eventemitter2.js',
       method: 'emit',
       column: 22,
       native: false,
       line: 271 },
     { function: 'carapace.run',
       file: '/opt/haibu/carapace-versions/0.8.19/node_modules/haibu-carapace/lib/carapace.js',
       method: 'run',
       column: 14,
       native: false,
       line: 174 },
     { function: 'process.startup.processNextTick.process._tickCallback',
       file: 'node.js',
       method: 'startup.processNextTick.process._tickCallback',
       column: 9,
       native: false,
       line: 244 },
     [length]: 5 ] }