From c97af3ee9165b8620ae48bc965161eac3e54a7a2 Mon Sep 17 00:00:00 2001
From: Pavel Feldman <pavel.feldman@gmail.com>
Date: Fri, 23 Oct 2020 10:38:26 -0700
Subject: [PATCH] fix(listeners): avoid "too many listeners" problem safely
 (#4223)

---
 src/server/processLauncher.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/server/processLauncher.ts b/src/server/processLauncher.ts
index b19281a7a0..883f524e15 100644
--- a/src/server/processLauncher.ts
+++ b/src/server/processLauncher.ts
@@ -58,6 +58,12 @@ export async function gracefullyCloseAll() {
   await Promise.all(Array.from(gracefullyCloseSet).map(gracefullyClose => gracefullyClose().catch(e => {})));
 }
 
+// We currently spawn a process per page when recording video in Chromium.
+//  This triggers "too many listeners" on the process object once you have more than 10 pages open.
+const maxListeners = process.getMaxListeners();
+if (maxListeners !== 0)
+  process.setMaxListeners(Math.max(maxListeners || 0, 100));
+
 export async function launchProcess(options: LaunchProcessOptions): Promise<LaunchResult> {
   const cleanup = () => helper.removeFolders(options.tempDirectories);