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    There's some conflicting dependencies in your pom.xml. Try adding an entry to exclude org.eclipse.jetty.aggregate from dependencies, as this seems to solve the problem.

Solutions on the web

via Spring JIRA by Aaron Loes, 2 years ago
Id must be assignable to Serializable! Object of class [null] must be an instance of interface java.io.Serializable
via Spring JIRA by Aaron Loes, 1 year ago
Id must be assignable to Serializable! Object of class [null] must be an instance of interface java.io.Serializable
via Stack Overflow by Stackee007
, 2 years ago
Id must be assignable to Serializable! Object of class [null] must be an instance of interface java.io.Serializable
via Spring JIRA by Petar Tahchiev, 1 year ago
Id must be assignable to Serializable! Object of class [null] must be an instance of interface java.io.Serializable
via Spring JIRA by Petar Tahchiev, 2 years ago
Id must be assignable to Serializable! Object of class [null] must be an instance of interface java.io.Serializable
via Google Groups by venkatesh t, 11 months ago
-INF/lib/log4j-slf4j-impl-2.6.2.jar). If you are using WebLogic you will need to add 'org.slf4j' to prefer-application-packages in WEB-INF/weblogic.xml Object of class [org.apache.logging.slf4j.Log4jLoggerFactory] must be an instance of class ch.qos.logback.classic.LoggerContext
java.lang.IllegalArgumentException: Id must be assignable to Serializable! Object of class [null] must be an instance of interface java.io.Serializable	at org.springframework.util.Assert.isInstanceOf(Assert.java:337)	at org.springframework.data.rest.webmvc.support.RepositoryEntityLinks.linkToSingleResource(RepositoryEntityLinks.java:147)	at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.getSelfLinkFor(PersistentEntityResourceAssembler.java:88)	at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.toResource(PersistentEntityResourceAssembler.java:64)	at org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController$1.apply(RepositoryPropertyReferenceController.java:141)	at org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController$1.apply(RepositoryPropertyReferenceController.java:110)	at org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.doWithReferencedProperty(RepositoryPropertyReferenceController.java:464)	at org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.followPropertyReference(RepositoryPropertyReferenceController.java:148)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:685)	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:919)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:724)