debugger: decrease timeout used to wait for the port to be free

By default, the debugger would query the specified inspector
sever port to see if it's available before starting the server,
and it would keep retrying until a timeout (previously 9999 ms)
is reached. This timeout seems to be longer than necessary. This
patch decreases the timeout to 3 seconds.

PR-URL: #44359
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Richard Lau <rlau@redhat.com>

lib/internal/debugger/inspect.js

@@ -45,7 +45,7 @@ const debuglog = util.debuglog('inspect');
 
 const { ERR_DEBUGGER_STARTUP_ERROR } = require('internal/errors').codes;
 
-async function portIsFree(host, port, timeout = 9999) {
+async function portIsFree(host, port, timeout = 3000) {
   if (port === 0) return; // Binding to a random port.
 
   const retryDelay = 150;
@@ -64,7 +64,10 @@ async function portIsFree(host, port, timeout = 9999) {
     const error = await new Promise((resolve) => {
       const socket = net.connect(port, host);
       socket.on('error', resolve);
-      socket.on('connect', resolve);
+      socket.on('connect', () => {
+        socket.end();
+        resolve();
+      });
     });
     if (error?.code === 'ECONNREFUSED') {
       return;

test/common/debugger.js

@@ -7,7 +7,13 @@ const BREAK_MESSAGE = new RegExp('(?:' + [
   'exception', 'other', 'promiseRejection',
 ].join('|') + ') in', 'i');
 
-const TIMEOUT = common.platformTimeout(5000);
+let TIMEOUT = common.platformTimeout(5000);
+if (common.isWindows) {
+  // Some of the windows machines in the CI need more time to receive
+  // the outputs from the client.
+  // https://github.com/nodejs/build/issues/3014
+  TIMEOUT = common.platformTimeout(15000);
+}
 
 function isPreBreak(output) {
   return /Break on start/.test(output) && /1 \(function \(exports/.test(output);