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cluster: fix closing dgram sockets in cluster workers throws errors
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This fixes closing dgram sockets right after binding in cluster
workers will throws `ERR_SOCKET_DGRAM_NOT_RUNNING` errors.

PR-URL: #43709
Fixes: #40671
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
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oyyd authored and targos committed Jul 31, 2022
1 parent 42610cc commit 61b5d4a
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4 changes: 4 additions & 0 deletions lib/internal/cluster/child.js
Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,10 @@ cluster._getServer = function(obj, options, cb) {
});

obj.once('listening', () => {
// short-lived sockets might have been closed
if (!indexes.has(indexesKey)) {
return;
}
cluster.worker.state = 'listening';
const address = obj.address();
message.act = 'listening';
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29 changes: 29 additions & 0 deletions test/parallel/test-dgram-cluster-close-in-listening.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,29 @@
'use strict';
// Ensure that closing dgram sockets in 'listening' callbacks of cluster workers
// won't throw errors.

const common = require('../common');
const dgram = require('dgram');
const cluster = require('cluster');
if (common.isWindows)
common.skip('dgram clustering is currently not supported on windows.');

if (cluster.isPrimary) {
for (let i = 0; i < 3; i += 1) {
cluster.fork();
}
} else {
const socket = dgram.createSocket('udp4');

socket.on('error', common.mustNotCall());

socket.on('listening', common.mustCall(() => {
socket.close();
}));

socket.on('close', common.mustCall(() => {
cluster.worker.disconnect();
}));

socket.bind(0);
}

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