From 42b94d69e62edb85d780e8997a724801d8a48041 Mon Sep 17 00:00:00 2001
From: Yuchen Shi <yuchenshi@google.com>
Date: Wed, 12 Oct 2022 08:59:17 -0700
Subject: [PATCH] Fixes error `EADDRNOTAVAIL` in portUtils. (#5112)

---
 CHANGELOG.md              |  1 +
 src/emulator/portUtils.ts | 17 +++++++++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5cb75b84cde..6294d9ace28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,2 +1,3 @@
 - Fixes issue where errors were not properly propagating when listing backends. (#5071)
 - Fixes issue where message from `-m` on deploy was not being properly applied. (#5107)
+- Fixes error `EADDRNOTAVAIL` when running emulators in Docker.
diff --git a/src/emulator/portUtils.ts b/src/emulator/portUtils.ts
index 67a2741755e..77d34a0cc29 100644
--- a/src/emulator/portUtils.ts
+++ b/src/emulator/portUtils.ts
@@ -9,6 +9,7 @@ import { IPV4_UNSPECIFIED, IPV6_UNSPECIFIED, Resolver } from "./dns";
 import { Emulators, ListenSpec } from "./types";
 import { Constants } from "./constants";
 import { EmulatorLogger } from "./emulatorLogger";
+import { logger } from "../logger";
 
 // See:
 // - https://stackoverflow.com/questions/4313403/why-do-browsers-block-some-ports
@@ -127,10 +128,22 @@ export async function checkListenable(
     dummyServer.once("error", (err) => {
       dummyServer.removeAllListeners();
       const e = err as Error & { code?: string };
-      if (e.code === "EADDRINUSE" || e.code === "EACCES") {
+      if (
+        e.code === "EADDRINUSE" ||
+        e.code === "EACCES" ||
+        // Where the address is not bindable (not just the port), e.g. in Docker:
+        // https://github.com/firebase/firebase-tools/issues/4741#issuecomment-1275318134
+        e.code === "EADDRNOTAVAIL" ||
+        e.code === "EINVAL"
+      ) {
         resolve(false);
       } else {
-        reject(e);
+        // Other unknown issues -- we'll log a warning and return unavailable.
+        logger.warn(
+          `portUtils: Error when trying to check port ${addr.port} (on ${addr.address}): ${e.code}`
+        );
+        logger.warn(e);
+        resolve(false);
       }
     });
     dummyServer.once("listening", () => {