68 lines
2.1 KiB
JavaScript
68 lines
2.1 KiB
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const child_process = require('child_process');
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// Test that workers fail with meaningful error message
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// when their initialization fails.
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if (common.isWindows) {
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common.skip('ulimit does not work on Windows.');
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}
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// A reasonably low fd count. An empty node process
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// creates around 30 fds for its internal purposes,
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// so making it too low will crash the process early,
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// making it too high will cause too much resource use.
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const OPENFILES = 128;
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// Double the open files - so that some workers fail for sure.
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const WORKERCOUNT = 256;
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if (process.argv[2] === 'child') {
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const { Worker } = require('worker_threads');
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for (let i = 0; i < WORKERCOUNT; ++i) {
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const worker = new Worker(
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'require(\'worker_threads\').parentPort.postMessage(2 + 2)',
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{ eval: true });
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worker.on('message', (result) => {
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assert.strictEqual(result, 4);
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});
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// We want to test that if there is an error in a constrained running
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// environment, it will be one of `EMFILE` or `ERR_WORKER_INIT_FAILED`.
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// `common.mustCall*` cannot be used here as in some environments
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// (i.e. single cpu) `ulimit` may not lead to such an error.
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worker.on('error', (e) => {
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assert.match(e.message, /EMFILE/);
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assert.ok(e.code === 'ERR_WORKER_INIT_FAILED' || e.code === 'EMFILE');
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});
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}
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} else {
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// Limit the number of open files, to force workers to fail.
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let testCmd = `ulimit -n ${OPENFILES} && `;
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testCmd += `${process.execPath} ${__filename} child`;
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const cp = child_process.exec(testCmd);
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// Turn on the child streams for debugging purposes.
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let stdout = '';
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cp.stdout.setEncoding('utf8');
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cp.stdout.on('data', (chunk) => {
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stdout += chunk;
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});
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let stderr = '';
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cp.stderr.setEncoding('utf8');
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cp.stderr.on('data', (chunk) => {
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stderr += chunk;
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});
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cp.on('exit', common.mustCall((code, signal) => {
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console.log(`child stdout: ${stdout}\n`);
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console.log(`child stderr: ${stderr}\n`);
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assert.strictEqual(code, 0);
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assert.strictEqual(signal, null);
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}));
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}
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