Increase KestrelServerLimits.KeepAliveTimeout to 130 seconds (#32636)

* Increase KestrelServerLimits.KeepAliveTimeout to 130 seconds

* Fix KeepAliveTimeoutDefault test

Author: halter73

src/Servers/Kestrel/Core/src/KestrelServerLimits.cs

@@ -33,8 +33,9 @@ public class KestrelServerLimits
         // Matches the default LimitRequestFields in Apache httpd.
         private int _maxRequestHeaderCount = 100;
 
-        // Matches the default http.sys connectionTimeout.
-        private TimeSpan _keepAliveTimeout = TimeSpan.FromMinutes(2);
+        // Slightly more than SocketHttpHandler's old PooledConnectionIdleTimeout of 2 minutes.
+        // https://github.com/dotnet/runtime/issues/52267
+        private TimeSpan _keepAliveTimeout = TimeSpan.FromSeconds(130);
 
         private TimeSpan _requestHeadersTimeout = TimeSpan.FromSeconds(30);
 
@@ -169,7 +170,7 @@ public long? MaxRequestBodySize
 
         /// <summary>
         /// Gets or sets the keep-alive timeout.
-        /// Defaults to 2 minutes.
+        /// Defaults to 130 seconds.
         /// </summary>
         /// <remarks>
         /// </remarks>

src/Servers/Kestrel/Core/test/KestrelServerLimitsTests.cs

@@ -150,7 +150,7 @@ public void MaxRequestHeaderCountValid(int value)
         [Fact]
         public void KeepAliveTimeoutDefault()
         {
-            Assert.Equal(TimeSpan.FromMinutes(2), new KestrelServerLimits().KeepAliveTimeout);
+            Assert.Equal(TimeSpan.FromSeconds(130), new KestrelServerLimits().KeepAliveTimeout);
         }
 
         [Theory]