File: test-cluster-master-error.js

package info (click to toggle)
nodejs 0.10.29~dfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 32,760 kB
  • ctags: 58,506
  • sloc: cpp: 330,356; ansic: 47,440; python: 12,756; sh: 1,365; makefile: 665; lisp: 222; ruby: 76; xml: 16; awk: 10
file content (140 lines) | stat: -rw-r--r-- 3,791 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.


var common = require('../common');
var assert = require('assert');
var cluster = require('cluster');

// Cluster setup
if (cluster.isWorker) {
  var http = require('http');
  http.Server(function() {

  }).listen(common.PORT, '127.0.0.1');

} else if (process.argv[2] === 'cluster') {

  var totalWorkers = 2;

  // Send PID to testcase process
  var forkNum = 0;
  cluster.on('fork', function forkEvent(worker) {

    // Send PID
    process.send({
      cmd: 'worker',
      workerPID: worker.process.pid
    });

    // Stop listening when done
    if (++forkNum === totalWorkers) {
      cluster.removeListener('fork', forkEvent);
    }
  });

  // Throw accidently error when all workers are listening
  var listeningNum = 0;
  cluster.on('listening', function listeningEvent() {

    // When all workers are listening
    if (++listeningNum === totalWorkers) {
      // Stop listening
      cluster.removeListener('listening', listeningEvent);

      // throw accidently error
      process.nextTick(function() {
        console.error('about to throw');
        throw new Error('accidently error');
      });
    }

  });

  // Startup a basic cluster
  cluster.fork();
  cluster.fork();

} else {
  // This is the testcase

  var fork = require('child_process').fork;

  var isAlive = function(pid) {
    try {
      //this will throw an error if the process is dead
      process.kill(pid, 0);

      return true;
    } catch (e) {
      return false;
    }
  };

  var existMaster = false;
  var existWorker = false;

  // List all workers
  var workers = [];

  // Spawn a cluster process
  var master = fork(process.argv[1], ['cluster'], {silent: true});

  // Handle messages from the cluster
  master.on('message', function(data) {

    // Add worker pid to list and progress tracker
    if (data.cmd === 'worker') {
      workers.push(data.workerPID);
    }
  });

  // When cluster is dead
  master.on('exit', function(code) {

    // Check that the cluster died accidently
    existMaster = !!code;

    // Give the workers time to shut down
    setTimeout(checkWorkers, 200);

    function checkWorkers() {
      // When master is dead all workers should be dead to
      var alive = false;
      workers.forEach(function(pid) {
        if (isAlive(pid)) {
          alive = true;
        }
      });

      // If a worker was alive this did not act as expected
      existWorker = !alive;
    }
  });

  process.once('exit', function() {
    var m = 'The master did not die after an error was throwed';
    assert.ok(existMaster, m);
    m = 'The workers did not die after an error in the master';
    assert.ok(existWorker, m);
  });

}