after run pm2 for some time, all processes Managed by pm2 is disappear

nodejs: 10:30 pm2:0.9.3

err log:

  return codec.decode(msg);
               ^
TypeError: Cannot call method 'decode' of undefined
    at Parser.decode (/data/bmob/installed/nodejs0.10.30/lib/node_modules/pm2/node_modules/axon/lib/parser.js:176:16)
    at Parser.parseBody (/data/bmob/installed/nodejs0.10.30/lib/node_modules/pm2/node_modules/axon/lib/parser.js:153:31)
    at Parser.frameBody (/data/bmob/installed/nodejs0.10.30/lib/node_modules/pm2/node_modules/axon/lib/parser.js:106:25)
    at Parser.write (/data/bmob/installed/nodejs0.10.30/lib/node_modules/pm2/node_modules/axon/lib/parser.js:50:13)
    at Parser.frameHeader (/data/bmob/installed/nodejs0.10.30/lib/node_modules/pm2/node_modules/axon/lib/parser.js:81:30)
    at Parser.write (/data/bmob/installed/nodejs0.10.30/lib/node_modules/pm2/node_modules/axon/lib/parser.js:49:36)
    at Socket.emit (events.js:95:17)
    at Socket.<anonymous> (_stream_readable.js:764:14)
    at Socket.emit (events.js:92:17)
    at emitReadable_ (_stream_readable.js:426:10)