在 APIHealthCheck 上获取 Dropwizard 客户端和 Jersey/HTTP I/O 错误

Question

I am currently doing an assignment for a class that requires me to develop a Maven project on eclipse that utilizes Dropwizard Authentication and Jersey HTTP. I looked everywhere on the internet for a solution, including stackoverflow. When I run the server on my local machine, it seems to run fine. But when I do the simple health check on http://localhost:8080/status, it gives me this error message.

127.0.0.1 - - [04/Jun/2021:21:25:52 +0000] "GET /gameusers HTTP/1.1" 404 43 "-" "GameAuthApplication (GameUserRESTClient)" 17
[0:0:0:0:0:0:0:1] - - [04/Jun/2021:21:25:52 +0000] "GET /status HTTP/1.1" 200 21845 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36" 143
ERROR [2021-06-04 21:25:52,503] org.glassfish.jersey.server.ServerRuntime$Responder: An I/O error has occurred while writing a response message entity to the container output stream.
! com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.Collections$UnmodifiableMap$UnmodifiableEntrySet[0]->java.util.Collections$UnmodifiableMap$UnmodifiableEntrySet$UnmodifiableEntry["APIHealthCheck"]->com.codahale.metrics.health.HealthCheck$Result["error"]->javax.ws.rs.ProcessingException["cause"]->com.fasterxml.jackson.databind.exc.MismatchedInputException["location"]->com.fasterxml.jackson.core.JsonLocation["sourceRef"])
! at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
! at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1276)
! at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:400)
! at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71)
! at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33)
! at com.fasterxml.jackson.module.blackbird.ser.ObjectPropertyWriter.serializeAsField(ObjectPropertyWriter.java:95)
! at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770)
! at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
! at com.fasterxml.jackson.module.blackbird.ser.ObjectPropertyWriter.serializeAsField(ObjectPropertyWriter.java:95)
! at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770)
! at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
! at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
! at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770)
! at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
! at com.fasterxml.jackson.module.blackbird.ser.ObjectPropertyWriter.serializeAsField(ObjectPropertyWriter.java:95)
! at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770)
! at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
! at com.fasterxml.jackson.databind.ser.impl.MapEntrySerializer.serializeDynamic(MapEntrySerializer.java:407)
! at com.fasterxml.jackson.databind.ser.impl.MapEntrySerializer.serialize(MapEntrySerializer.java:341)
! at com.fasterxml.jackson.databind.ser.impl.MapEntrySerializer.serialize(MapEntrySerializer.java:24)
! at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:145)
! at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:107)
! at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25)
! at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
! at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:400)
! at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1510)
! at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1006)
! at com.fasterxml.jackson.jaxrs.base.ProviderBase.writeTo(ProviderBase.java:626)
! at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:242)
! at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:227)
! at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139)
! at io.dropwizard.jersey.errors.EofExceptionWriterInterceptor.aroundWriteTo(EofExceptionWriterInterceptor.java:39)
! at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139)
! at org.glassfish.jersey.server.internal.JsonWithPaddingInterceptor.aroundWriteTo(JsonWithPaddingInterceptor.java:85)
! at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139)
! at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:61)
! ... 54 common frames omitted
! Causing: org.glassfish.jersey.server.internal.process.MappableException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.Collections$UnmodifiableMap$UnmodifiableEntrySet[0]->java.util.Collections$UnmodifiableMap$UnmodifiableEntrySet$UnmodifiableEntry["APIHealthCheck"]->com.codahale.metrics.health.HealthCheck$Result["error"]->javax.ws.rs.ProcessingException["cause"]->com.fasterxml.jackson.databind.exc.MismatchedInputException["location"]->com.fasterxml.jackson.core.JsonLocation["sourceRef"])
! at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:67)
! at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:139)
! at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1116)
! at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:635)
! at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:373)
! at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:363)
! at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:258)
! at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
! at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
! at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
! at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
! at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
! at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
! at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
! at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
! at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
! at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
! at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
! at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
! at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
! at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:791)
! at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)
! at io.dropwizard.servlets.ThreadNameFilter.doFilter(ThreadNameFilter.java:35)
! at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
! at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
! at io.dropwizard.jersey.filter.AllowedMethodsFilter.handle(AllowedMethodsFilter.java:47)
! at io.dropwizard.jersey.filter.AllowedMethodsFilter.doFilter(AllowedMethodsFilter.java:41)
! at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
! at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
! at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
! at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
! at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1435)
! at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
! at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
! at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
! at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1350)
! at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
! at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
! at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:313)
! at io.dropwizard.jetty.RoutingHandler.handle(RoutingHandler.java:52)
! at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:763)
! at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:54)
! at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:179)
! at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
! at org.eclipse.jetty.server.Server.handle(Server.java:516)
! at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)
! at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
! at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
! at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
! at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
! at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
! at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
! at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:882)
! at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1036)
! at java.base/java.lang.Thread.run(Thread.java:832)

I tried following the tutorial verbatim on https://howtodoinjava.com/dropwizard/dropwizard-basic-auth-security-example/

The code is in a git repo... https://github.com/RedJaVa68/GameAuth.git

Answer 1

This is a serialization issue. As per the github repo that you shared there doesn't seem to be a endpoint associated with /gameusers path. But its being called in the health check callback. So the call is failing and its not able to deserialize error response into ArrayList. In GameUserRESTController.java you need to add the path as follows:

@Produces({"application/json"})
@Path("/gameusers") // this might be missing
public class GameUserRESTController {