Websockets seem broken in Java 11 build

Summary

In the Java 11 build everything works now as expected except that the websockets for e.g. the request table update result in 403/404 and disconnects (looking at the Chrome dev console).

Steps to reproduce

1. Go to request table as TA+
2. Open console
3. See the errors

Possible Fix

Logs

Logs are not very informative, there seem to be even more of these though: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation

This is hinting towards public getters missing on one of the objects we're trying to send: https://stackoverflow.com/questions/28466207/could-not-find-acceptable-representation-using-spring-boot-starter-web It seems both the error and the logs are very uninformative.

Other relevant part of the log: 2020-01-15 09:31:39 [redisMessageListenerContainer-8] WARN o.s.d.r.l.RedisMessageListenerContainer - Execution of message listener failed, and no ErrorHandler has been set. org.springframework.data.redis.serializer.SerializationException: Cannot deserialize; nested exception is org.springframework.core.serializer.support.SerializationFaile dException: Failed to deserialize payload. Is the byte array a result of corresponding serialization for DefaultDeserializer?; nested exception is java.io.InvalidClassE xception: org.springframework.security.web.savedrequest.DefaultSavedRequest; local class incompatible: stream classdesc serialVersionUID = 6412739018021506926, local cl ass serialVersionUID = 2179821680723387540 at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:84) at org.springframework.data.redis.core.AbstractOperations.deserializeHashValue(AbstractOperations.java:354) at org.springframework.data.redis.core.AbstractOperations.deserializeHashMap(AbstractOperations.java:298) at org.springframework.data.redis.core.DefaultHashOperations.entries(DefaultHashOperations.java:247) at org.springframework.data.redis.core.DefaultBoundHashOperations.entries(DefaultBoundHashOperations.java:183) at org.springframework.session.data.redis.RedisOperationsSessionRepository.getSession(RedisOperationsSessionRepository.java:466) at org.springframework.session.data.redis.RedisOperationsSessionRepository.onMessage(RedisOperationsSessionRepository.java:555) at org.springframework.data.redis.listener.RedisMessageListenerContainer.executeListener(RedisMessageListenerContainer.java:250) at org.springframework.data.redis.listener.RedisMessageListenerContainer.processMessage(RedisMessageListenerContainer.java:240) at org.springframework.data.redis.listener.RedisMessageListenerContainer.lambda$dispatchMessage$0(RedisMessageListenerContainer.java:986) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: org.springframework.core.serializer.support.SerializationFailedException: Failed to deserialize payload. Is the byte array a result of corresponding serializ ation for DefaultDeserializer?; nested exception is java.io.InvalidClassException: org.springframework.security.web.savedrequest.DefaultSavedRequest; local class incomp atible: stream classdesc serialVersionUID = 6412739018021506926, local class serialVersionUID = 2179821680723387540 at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:78) at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:36) at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:82) ... 10 common frames omitted Caused by: java.io.InvalidClassException: org.springframework.security.web.savedrequest.DefaultSavedRequest; local class incompatible: stream classdesc serialVersionUID = 6412739018021506926, local class serialVersionUID = 2179821680723387540 at java.base/java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:689) at java.base/java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1903) at java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1772) at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2060) at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1594) at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:430) at org.springframework.core.serializer.DefaultDeserializer.deserialize(DefaultDeserializer.java:72) at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:73) ... 12 common frames omitted

2020-01-15 09:32:43 [http-nio-8081-exec-10] ERROR n.t.e.q.c.ErrorControllerAdvice - A Request (/stomp//eventsource): raised org.springframework.web.HttpMed iaTypeNotAcceptableException: Could not find acceptable representation 2020-01-15 09:32:43 [http-nio-8081-exec-10] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] threw exception java.lang.IllegalStateException: getOutputStream() has already been called for this response at org.apache.catalina.connector.Response.getWriter(Response.java:581) at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:227) at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:114) at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:360) at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:189) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1371) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1117) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1056) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:580) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:516) at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:388) at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:253) at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:348) at org.apache.catalina.core.AsyncContextImpl.setErrorState(AsyncContextImpl.java:437) at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:176) at org.apache.coyote.AbstractProcessor.dispatch(AbstractProcessor.java:241) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:53) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.base/java.lang.Thread.run(Thread.java:834) 2020-01-15 09:32:43 [http-nio-8081-exec-10] ERROR o.a.c.c.C.[Tomcat].[localhost] - Exception Processing ErrorPage[errorCode=0, location=/error] org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalStateException: getOutputStream() has already been called for this response at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1013) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:580) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:516) at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:388) at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:253) at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:348) at org.apache.catalina.core.AsyncContextImpl.setErrorState(AsyncContextImpl.java:437) at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:176) at org.apache.coyote.AbstractProcessor.dispatch(AbstractProcessor.java:241) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:53) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.IllegalStateException: getOutputStream() has already been called for this response at org.apache.catalina.connector.Response.getWriter(Response.java:581) at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:227) at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:114) at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:360) at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:189) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1371) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1117) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1056) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ... 23 common frames omitted