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我在新澤西的應用程序的簡單方法，它返回一個名爲PodList複雜的對象：爲什麼當我使用Jackson返回JSON時，Grizzly返回500「請求失敗」？
@GET
\t @Produces(MediaType.APPLICATION_JSON)
\t @Path("/x")
\t public PodList getPods(){
\t \t try (KubernetesClient client = new DefaultKubernetesClient();) { \t
\t \t \t PodList pl = client.pods().list();
\t \t \t ObjectMapper om = new ObjectMapper();
\t \t \t try {
\t \t \t \t String x = om.writeValueAsString(pl);
\t \t \t \t System.out.println(x);
\t \t \t } catch (JsonProcessingException ex) {
\t \t \t \t Logger.getLogger(CatalogEndPoint.class.getName()).
\t \t \t \t \t \t log(Level.SEVERE, null, ex);
\t \t \t }
\t \t \t return pl;
\t \t } \t
\t }無例外被捕獲在catch塊，我看到打印輸出，所以我敢肯定傑克遜能夠序列化這種類型。
在我的灰熊設置代碼，我肯定要做到這一點：
final ResourceConfig rc = new ResourceConfig();
rc.packages(CatalogEndPoint.class.getPackage().getName());
rc.register(JacksonFeature.class);
\t \t rc.property("jersey.config.server.tracing.type", "ALL");
\t \t rc.property("jersey.config.server.tracing.threshold", "VERBOSE");請注意，我啓用了服務器跟蹤，但它是無用的。當我在CatalogEndPoint資源上點擊我的「/ x」路徑時，它不會跟蹤任何內容。所以，我所做的就是設置一個Java logging.properties文件：
#logging.properties file.
# "handlers" specifies a comma separated list of log Handler
# classes. These handlers will be installed during VM startup.
# Note that these classes must be on the system classpath.
# By default we only configure a ConsoleHandler, which will only
# show messages at the INFO and above levels.
\t handlers= java.util.logging.ConsoleHandler
# Default global logging level.
# This specifies which kinds of events are logged across
# all loggers. For any given facility this global level
# can be overriden by a facility-specific level.
# Note that the ConsoleHandler also has a separate level
# setting to limit messages printed to the console.
.level=ALL
com.sun.jersey.level=ALL
# Limit the messages that are printed on the console to INFO and above.
java.util.logging.ConsoleHandler.level = ALL
java.util.logging.ConsoleHandler.formatter =
java.util.logging.SimpleFormatter然後我終於可以看到堆棧跟蹤
INE: service exception
org.glassfish.jersey.server.ContainerException: java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.type.TypeFactory.constructType(Ljava/lang/reflect/Type;Ljava/lang/Class;)Lcom/fasterxml/jackson/databind/JavaType;
\t at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer$ResponseWriter.rethrow(GrizzlyHttpContainer.java:324)
\t at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer$ResponseWriter.failure(GrizzlyHttpContainer.java:306)
\t at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:509)
\t at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:334)
\t at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
\t at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
\t at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
\t at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
\t at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
\t at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
\t at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
\t at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
\t at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:384)
\t at org.glassfish.grizzly.http.server.HttpHandler$1.run(HttpHandler.java:224)
\t at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
\t at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
\t at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.type.TypeFactory.constructType(Ljava/lang/reflect/Type;Ljava/lang/Class;)Lcom/fasterxml/jackson/databind/JavaType;
\t at com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector._fullSerializationType(JaxbAnnotationIntrospector.java:1465)
\t at com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector._findContentAdapter(JaxbAnnotationIntrospector.java:1401)
\t at com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector.findSerializationContentConverter(JaxbAnnotationIntrospector.java:804)
\t at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findSerializationContentConverter(AnnotationIntrospectorPair.java:372)
\t at com.fasterxml.jackson.databind.ser.std.StdSerializer.findConvertingContentSerializer(StdSerializer.java:417)
\t at com.fasterxml.jackson.databind.ser.std.MapSerializer.createContextual(MapSerializer.java:346)
\t at com.fasterxml.jackson.databind.SerializerProvider.handlePrimaryContextualization(SerializerProvider.java:928)
\t at com.fasterxml.jackson.databind.ser.AnyGetterWriter.resolve(AnyGetterWriter.java:89)
\t at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.resolve(BeanSerializerBase.java:350)
\t at com.fasterxml.jackson.databind.ser.SerializerCache.addAndResolveNonTypedSerializer(SerializerCache.java:197)
\t at com.fasterxml.jackson.databind.SerializerProvider._createAndCacheUntypedSerializer(SerializerProvider.java:1177)
\t at com.fasterxml.jackson.databind.SerializerProvider.findValueSerializer(SerializerProvider.java:490)
\t at com.fasterxml.jackson.databind.SerializerProvider.findTypedValueSerializer(SerializerProvider.java:688)
\t at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:107)
\t at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1428)
\t at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:930)
\t at com.fasterxml.jackson.jaxrs.base.ProviderBase.writeTo(ProviderBase.java:650)
\t at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:265)
\t at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:250)
\t at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
\t at org.glassfish.jersey.server.internal.JsonWithPaddingInterceptor.aroundWriteTo(JsonWithPaddingInterceptor.java:106)
\t at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
\t at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:86)
\t at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
\t at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1130)
\t at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:711)
\t at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:444)
\t at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:434)
\t at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:329)
\t ... 13 more
可能是您的編譯時和運行時環境之間的庫版本差異。 –