Set Jackson FAIL_ON_UNKNOWN_PROPERTIES property to false by default

Issue: SPR-11891

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilder.java

@@ -384,6 +384,9 @@ public class Jackson2ObjectMapperBuilder {
 			this.objectMapper.registerModule(module);
 		}
 
+		if(!features.containsKey(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)) {
+			configureFeature(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+		}
 		for (Object feature : this.features.keySet()) {
 			configureFeature(feature, this.features.get(feature));
 		}

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperFactoryBean.java

@@ -413,6 +413,9 @@ public class Jackson2ObjectMapperFactoryBean implements FactoryBean<ObjectMapper
 			this.objectMapper.registerModule(module);
 		}
 
+		if(!features.containsKey(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)) {
+			configureFeature(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+		}
 		for (Object feature : this.features.keySet()) {
 			configureFeature(feature, this.features.get(feature));
 		}

spring-web/src/test/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilderTests.java

@@ -81,7 +81,7 @@ public class Jackson2ObjectMapperBuilderTests {
 		ObjectMapper objectMapper = Jackson2ObjectMapperBuilder.json().build();
 		assertNotNull(objectMapper);
 		assertTrue(objectMapper.isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-		assertTrue(objectMapper.isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+		assertFalse(objectMapper.isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
 		assertTrue(objectMapper.isEnabled(MapperFeature.AUTO_DETECT_FIELDS));
 		assertTrue(objectMapper.isEnabled(MapperFeature.AUTO_DETECT_GETTERS));
 		assertTrue(objectMapper.isEnabled(MapperFeature.AUTO_DETECT_SETTERS));
@@ -241,7 +241,7 @@ public class Jackson2ObjectMapperBuilderTests {
 
 		assertFalse(objectMapper.getSerializationConfig().isEnabled(MapperFeature.AUTO_DETECT_GETTERS));
 		assertTrue(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-		assertTrue(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+		assertFalse(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
 		assertFalse(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.AUTO_DETECT_FIELDS));
 		assertFalse(objectMapper.getFactory().isEnabled(JsonParser.Feature.AUTO_CLOSE_SOURCE));
 		assertFalse(objectMapper.getFactory().isEnabled(JsonGenerator.Feature.QUOTE_FIELD_NAMES));

spring-web/src/test/java/org/springframework/http/converter/json/Jackson2ObjectMapperFactoryBeanTests.java

@@ -260,7 +260,7 @@ public class Jackson2ObjectMapperFactoryBeanTests {
 
 		assertFalse(objectMapper.getSerializationConfig().isEnabled(MapperFeature.AUTO_DETECT_GETTERS));
 		assertTrue(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-		assertTrue(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+		assertFalse(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
 		assertFalse(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.AUTO_DETECT_FIELDS));
 		assertFalse(objectMapper.getFactory().isEnabled(JsonParser.Feature.AUTO_CLOSE_SOURCE));
 		assertFalse(objectMapper.getFactory().isEnabled(JsonGenerator.Feature.QUOTE_FIELD_NAMES));

spring-web/src/test/java/org/springframework/http/converter/json/MappingJackson2HttpMessageConverterTests.java

@@ -146,12 +146,13 @@ public class MappingJackson2HttpMessageConverterTests {
 		converter.read(MyBean.class, inputMessage);
 	}
 
-	@Test(expected = HttpMessageNotReadableException.class)
+	@Test
 	public void readValidJsonWithUnknownProperty() throws IOException {
 		String body = "{\"string\":\"string\",\"unknownProperty\":\"value\"}";
 		MockHttpInputMessage inputMessage = new MockHttpInputMessage(body.getBytes("UTF-8"));
 		inputMessage.getHeaders().setContentType(new MediaType("application", "json"));
 		converter.read(MyBean.class, inputMessage);
+		// Assert no HttpMessageNotReadableException is thrown
 	}
 
 	@Test

spring-web/src/test/java/org/springframework/http/converter/xml/MappingJackson2XmlHttpMessageConverterTests.java

@@ -102,12 +102,13 @@ public class MappingJackson2XmlHttpMessageConverterTests {
 		converter.read(MyBean.class, inputMessage);
 	}
 
-	@Test(expected = HttpMessageNotReadableException.class)
+	@Test
 	public void readValidXmlWithUnknownProperty() throws IOException {
 		String body = "<MyBean><string>string</string><unknownProperty>value</unknownProperty></MyBean>";
 		MockHttpInputMessage inputMessage = new MockHttpInputMessage(body.getBytes("UTF-8"));
 		inputMessage.getHeaders().setContentType(new MediaType("application", "xml"));
 		converter.read(MyBean.class, inputMessage);
+		// Assert no HttpMessageNotReadableException is thrown
 	}
 
 	@Test

spring-webmvc/src/test/java/org/springframework/web/servlet/config/MvcNamespaceTests.java

@@ -175,7 +175,7 @@ public class MvcNamespaceTests {
 				ObjectMapper objectMapper = ((AbstractJackson2HttpMessageConverter)converter).getObjectMapper();
 				assertTrue(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
 				assertTrue(objectMapper.getSerializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-				assertTrue(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+				assertFalse(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
 				if(converter instanceof MappingJackson2XmlHttpMessageConverter) {
 					assertEquals(XmlMapper.class, objectMapper.getClass());
 				}

spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupportExtensionTests.java

@@ -162,12 +162,9 @@ public class WebMvcConfigurationSupportExtensionTests {
 		assertEquals(1, adapter.getMessageConverters().size());
 		assertEquals(MappingJackson2HttpMessageConverter.class, adapter.getMessageConverters().get(0).getClass());
 		ObjectMapper objectMapper = ((MappingJackson2HttpMessageConverter)adapter.getMessageConverters().get(0)).getObjectMapper();
-		assertTrue(objectMapper.getDeserializationConfig()
-				.isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-		assertTrue(objectMapper.getSerializationConfig()
-				.isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-		assertTrue(objectMapper.getDeserializationConfig()
-				.isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+		assertTrue(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
+		assertTrue(objectMapper.getSerializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
+		assertFalse(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
 
 		DirectFieldAccessor fieldAccessor = new DirectFieldAccessor(adapter);
 

spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupportTests.java

@@ -164,7 +164,7 @@ public class WebMvcConfigurationSupportTests {
 				ObjectMapper objectMapper = ((AbstractJackson2HttpMessageConverter)converter).getObjectMapper();
 				assertTrue(objectMapper.getDeserializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
 				assertTrue(objectMapper.getSerializationConfig().isEnabled(MapperFeature.DEFAULT_VIEW_INCLUSION));
-				assertTrue(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
+				assertFalse(objectMapper.getDeserializationConfig().isEnabled(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES));
 				if(converter instanceof MappingJackson2XmlHttpMessageConverter) {
 					assertEquals(XmlMapper.class, objectMapper.getClass());
 				}