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
|
'use strict';
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 accidental 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 accidental error
process.nextTick(function() {
console.error('about to throw');
throw new Error('accidental 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 masterExited = false;
var workersExited = 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 accidentally (non-zero exit code)
masterExited = !!code;
var pollWorkers = function() {
// When master is dead all workers should be dead too
var alive = false;
workers.forEach(function(pid) {
if (isAlive(pid)) {
alive = true;
}
});
if (alive) {
setTimeout(pollWorkers, 50);
} else {
workersExited = true;
}
};
// Loop indefinitely until worker exit
pollWorkers();
});
process.once('exit', function() {
var m = 'The master did not die after an error was thrown';
assert.ok(masterExited, m);
m = 'The workers did not die after an error in the master';
assert.ok(workersExited, m);
});
}
|
