fix(cobuilds): add socket + connect timeout (#5797)

* fix(cobuilds): add socket + connect timeout

Signed-off-by: Aramis Sennyey <aramissennyeydd@users.noreply.github.com>

* scope to just timeout additions

Signed-off-by: Aramis Sennyey <aramissennyeydd@users.noreply.github.com>

* rename changefile package

Signed-off-by: Aramis Sennyey <aramissennyeydd@users.noreply.github.com>

* rename changefile package

Signed-off-by: Aramis Sennyey <aramissennyeydd@users.noreply.github.com>

---------

Signed-off-by: Aramis Sennyey <aramissennyeydd@users.noreply.github.com>
Co-authored-by: Aramis Sennyey <aramissennyeydd@users.noreply.github.com>

Author: aramissennyeydd

common/changes/@microsoft/rush/fix-redis-reconnect_2026-05-07-00-00.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/rush",
+      "comment": "Set Redis `connectTimeout` and `socketTimeout` so half-dead TCP connections (NAT/firewall) surface in seconds instead of stalling in-flight commands for many minutes while the kernel waits to give up.",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@microsoft/rush"
+}

rush-plugins/rush-redis-cobuild-plugin/src/RedisCobuildLockProvider.ts

@@ -50,8 +50,12 @@ export class RedisCobuildLockProvider implements ICobuildLockProvider {
 
   public constructor(options: IRedisCobuildLockProviderOptions, rushSession: RushSession) {
     this._options = RedisCobuildLockProvider.expandOptionsWithEnvironmentVariables(options);
-    // Provide a default reconnect strategy that prevents more than 5 reconnect attempts.
+    // Detect half-dead connections quickly. Without `socketTimeout`, a silently-dropped
+    // TCP connection (NAT/firewall) can stall in-flight commands for many minutes while
+    // the kernel waits to surface the failure.
     this._options.socket = {
+      connectTimeout: 10_000,
+      socketTimeout: 30_000,
       reconnectStrategy: (count: number) => {
         this._terminal.writeErrorLine(`Redis client reconnecting attempt #${count}`);
         return count < 5 ? count * 1000 : false;