That does help, thanks! You are right, the exception was actually caused
by an interrupted request, not something in the resource code. No wonder
I couldn't find it :-)
Do you know what the default behavior is for a resource that returns a
null object? Sorry I know I can test this to figure it out myself but
I'd like to know what other developers of Jersey services typically do
in such cases. Thanks!
-Richard
> cowwoc <mailto:cowwoc_at_bbs.darktech.org>
> June 28, 2016 at 1:06 AM
> It's not clear whether these two exceptions are actually related. I
> will comment on the second exception though: your resource method was
> in the process of reading the HTTP request body and converting it into
> an object (whatever parameters you declared on your method) but
> someone terminated the connection before it could complete the
> conversion. For example, if your method takes a Date parameter but the
> HTTP body was empty, you'd get this error.
>
> I hope this helps.
>
> Gili
>
>
>
>
> Richard Sand <mailto:rsand_at_idfconnect.com>
> June 28, 2016 at 12:56 AM
> Hi all - I'm seeing an exception coming back from Jersey for one of my
> test cases and I can't determine exactly where its coming from in my
> code. I suspect its a NPE from within the class that my resource is
> returning but I'm not sure.
>
> Couple of questions:
>
> 1) When a resource returns a JAXB class as opposed to a Response
> object, what actually is supposed to happen if the returned object is
> null?
>
> 2) If the response is going to be null, is it better generate an
> exception that gets mapped in Jersey to provide a more interesting
> response to the client?
>
> Here is my stack trace - is this caused by an NPE or other runtime
> exception in the returned class during the marshaling?
>
> 2016-06-27 16:04:54.993 [tomcat-http--3] DEBUG
> c.s.j.s.container.ContainerResponse - Mapped exception to response: 405
> javax.ws.rs.WebApplicationException: null
> at
> com.sun.jersey.server.impl.uri.rules.TerminatingRule.accept(TerminatingRule.java:66)
>
> at
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
>
> at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>
> at
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
>
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
>
> .....
> 2016-06-27 16:05:26.511 [tomcat-http--4] ERROR
> c.s.j.s.container.ContainerResponse - The exception contained within
> MappableContainerException could not be mapped to a response,
> re-throwing to the HTTP container
> java.io.EOFException: No content to map to Object due to end of input
> at
> org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2766)
>
> at
> org.codehaus.jackson.map.ObjectMapper._readValue(ObjectMapper.java:2682)
> at
> org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1308)
> at
> org.codehaus.jackson.jaxrs.JacksonJsonProvider.readFrom(JacksonJsonProvider.java:419)
>
> at
> com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:490)
>
> at
> com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:555)
>
> at
> com.sun.jersey.server.impl.model.method.dispatch.FormDispatchProvider.processForm(FormDispatchProvider.java:103)
>
> at
> com.sun.jersey.server.impl.model.method.dispatch.FormDispatchProvider.access$000(FormDispatchProvider.java:68)
>
> at
> com.sun.jersey.server.impl.model.method.dispatch.FormDispatchProvider$FormParameterProvider.getInjectableValues(FormDispatchProvider.java:115)
>
> at
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153)
>
> at
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:183)
>
> at
> com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
>
> at
> com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
>
> at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>
> at
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
>
> at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>
> at
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
>
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
>
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
>
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
>
> at
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
>
> at
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
>
> at
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
>
> at
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733)
>
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
>
>
> Thanks for any help!
>
> -Richard