Set NO_REQUEST_TIMEOUT as a server option not a socket option

See gh-15822

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/UndertowWebServerFactoryCustomizer.java

@@ -37,6 +37,7 @@ import org.springframework.util.unit.DataSize;
  * @author Yulin Qin
  * @author Stephane Nicoll
  * @author Phillip Webb
+ * @author Arstiom Yudovin
  * @since 2.0.0
  */
 public class UndertowWebServerFactoryCustomizer implements
@@ -106,7 +107,7 @@ public class UndertowWebServerFactoryCustomizer implements
 
 	private void customizeConnectionTimeout(ConfigurableUndertowWebServerFactory factory,
 			Duration connectionTimeout) {
-		factory.addBuilderCustomizers((builder) -> builder.setSocketOption(
+		factory.addBuilderCustomizers((builder) -> builder.setServerOption(
 				UndertowOptions.NO_REQUEST_TIMEOUT, (int) connectionTimeout.toMillis()));
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/embedded/UndertowWebServerFactoryCustomizerTests.java

@@ -47,6 +47,7 @@ import static org.mockito.Mockito.verify;
  *
  * @author Brian Clozel
  * @author Phillip Webb
+ * @author Artsiom Yudovin
  */
 public class UndertowWebServerFactoryCustomizerTests {
 
@@ -143,6 +144,18 @@ public class UndertowWebServerFactoryCustomizerTests {
 		assertThat(map.contains(UndertowOptions.MAX_HEADER_SIZE)).isFalse();
 	}
 
+	@Test
+	public void customConnectionTimeout() {
+		bind("server.connection-timeout=100");
+		Builder builder = Undertow.builder();
+		ConfigurableUndertowWebServerFactory factory = mockFactory(builder);
+		this.customizer.customize(factory);
+		OptionMap map = ((OptionMap.Builder) ReflectionTestUtils.getField(builder,
+				"serverOptions")).getMap();
+		assertThat(map.contains(UndertowOptions.NO_REQUEST_TIMEOUT)).isTrue();
+		assertThat(map.get(UndertowOptions.NO_REQUEST_TIMEOUT)).isEqualTo(100);
+	}
+
 	private ConfigurableUndertowWebServerFactory mockFactory(Builder builder) {
 		ConfigurableUndertowWebServerFactory factory = mock(
 				ConfigurableUndertowWebServerFactory.class);