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cluster: fix libuv assert in net.listen()
Problem: calling `server.listen()` (no port) on a net.Server triggered the following libuv assertion: node: ../deps/uv/src/unix/stream.c:406: uv__write: Assertion `fd_to_send >= 0' failed. Cause: uv_tcp_t handles are lazily initialized. Omitting the port made the handle get initialized even more lazily. Too lazily - it wasn't initialized when the handle was sent over to the child process. Solution: implicitly bind to a random port in listen() when the port number is omitted, it forces the handle to initialize. This is not a change in behavior, listen() has always been identical to listen(0). Fixes #3325.
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// 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. | ||
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var common = require('../common'); | ||
var assert = require('assert'); | ||
var cluster = require('cluster'); | ||
var net = require('net'); | ||
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if (cluster.isMaster) { | ||
// ensure that the worker exits peacefully | ||
var worker = cluster.fork(); | ||
worker.on('exit', function(statusCode) { | ||
assert.equal(statusCode, 0); | ||
worker = null; | ||
}); | ||
process.on('exit', function() { | ||
assert.equal(worker, null); | ||
}); | ||
} | ||
else { | ||
// listen() without port should not trigger a libuv assert | ||
net.createServer(assert.fail).listen(process.exit); | ||
} |