diff --git a/lib/cli.js b/lib/cli.js
index ab055b48..ee8111ff 100644
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -2,6 +2,8 @@ var program = require('commander')
 
 var pkg = require('../package')
 var cliutil = require('./util/cliutil')
+var procutil = require('./util/procutil')
+var logger = require('./util/logger')
 
 program
   .version(pkg.version)
@@ -261,45 +263,60 @@ program
     , String
     , 'tcp://127.0.0.1:7116')
   .action(function() {
+    var log = logger.createLogger('cli')
     var options = cliutil.lastArg(arguments)
-      , fork = require('child_process').fork
 
     // app triproxy
-    fork(__filename, [
-      'triproxy', 'app001'
-    , '--bind-pub', options.bindAppPub
-    , '--bind-dealer', options.bindAppDealer
-    , '--bind-pull', options.bindAppPull
-    ])
+    procutil.fork(__filename, [
+        'triproxy', 'app001'
+      , '--bind-pub', options.bindAppPub
+      , '--bind-dealer', options.bindAppDealer
+      , '--bind-pull', options.bindAppPull
+      ])
+      .catch(function(err) {
+        log.error('app triproxy died', err.stack)
+      })
 
     // device triproxy
-    fork(__filename, [
-      'triproxy', 'dev001'
-    , '--bind-pub', options.bindDevPub
-    , '--bind-dealer', options.bindDevDealer
-    , '--bind-pull', options.bindDevPull
-    ])
+    procutil.fork(__filename, [
+        'triproxy', 'dev001'
+      , '--bind-pub', options.bindDevPub
+      , '--bind-dealer', options.bindDevDealer
+      , '--bind-pull', options.bindDevPull
+      ])
+      .catch(function(err) {
+        log.error('device triproxy died', err.stack)
+      })
 
     // coordinator one
-    fork(__filename, [
-      'coordinator', 'coord001'
-    , '--connect-app-dealer', options.bindAppDealer
-    , '--connect-dev-dealer', options.bindDevDealer
-    ])
+    procutil.fork(__filename, [
+        'coordinator', 'coord001'
+      , '--connect-app-dealer', options.bindAppDealer
+      , '--connect-dev-dealer', options.bindDevDealer
+      ])
+      .catch(function(err) {
+        log.error('coordinator 001 died', err.stack)
+      })
 
     // coordinator two
-    fork(__filename, [
-      'coordinator', 'coord002'
-    , '--connect-app-dealer', options.bindAppDealer
-    , '--connect-dev-dealer', options.bindDevDealer
-    ])
+    procutil.fork(__filename, [
+        'coordinator', 'coord002'
+      , '--connect-app-dealer', options.bindAppDealer
+      , '--connect-dev-dealer', options.bindDevDealer
+      ])
+      .catch(function(err) {
+        log.error('coordinator 002 died', err.stack)
+      })
 
     // provider
-    fork(__filename, [
-      'provider'
-    , '--connect-sub', options.bindDevPub
-    , '--connect-push', options.bindDevPull
-    ].concat(cliutil.allUnknownArgs(arguments)))
+    procutil.fork(__filename, [
+        'provider'
+      , '--connect-sub', options.bindDevPub
+      , '--connect-push', options.bindDevPull
+      ].concat(cliutil.allUnknownArgs(arguments)))
+      .catch(function(err) {
+        log.error('provider died', err.stack)
+      })
   })
 
 program.parse(process.argv)
diff --git a/lib/util/procutil.js b/lib/util/procutil.js
new file mode 100644
index 00000000..d363aa48
--- /dev/null
+++ b/lib/util/procutil.js
@@ -0,0 +1,36 @@
+var util = require('util')
+var cp = require('child_process')
+
+var Promise = require('bluebird')
+
+function ExitError(code) {
+  Error.call(this, util.format('Exit code "%d"', code))
+  this.name = 'ExitError'
+  this.code = code
+  Error.captureStackTrace(this, ExitError)
+}
+
+util.inherits(ExitError, Error)
+
+// Export
+module.exports.ExitError = ExitError
+
+// Export
+module.exports.fork = function() {
+  var args = arguments
+
+  return new Promise(function(resolve, reject) {
+    var proc = cp.fork.apply(cp, args)
+
+    proc.on('error', function(err) {
+      reject(err)
+      proc.kill()
+    })
+
+    proc.on('exit', function(code) {
+      if (code > 0) {
+        reject(new ExitError(code))
+      }
+    })
+  })
+}