I filed a bug at Spring JIRA and this is the response I get (
https://jira.spring.io/browse/SPR-17599):
There seems to be a misunderstanding in that conversation on the Tomcat
mailing list: It's not that we can't find the class of the name
javax.websocket.server.ServerContainer, it's the *ServletContext
attribute* with
name "javax.websocket.server.ServerContainer" that we can't find. In other
words, we can't find a pre-initialized WebSocket container instance.
So the root of the problem you can easily reproduce without Spring: Simply
implement a Servlet and check the return value of
getServletContext().getAttribute("javax.websocket.server.ServerContainer")
...
People
- Assignee:[image: juergen.hoeller] Juergen HoellerReporter:[image:
khteh] Teh Kok HowLast updater:Juergen Hoeller
- Votes:0 Vote for this issueWatchers:2 Start watching this issue
Dates
- Created:YesterdayUpdated:YesterdayDays since last comment:10 hours, 48
minutes ago
On Mon, Dec 10, 2018 at 11:41 PM Christopher Schultz <
ch...@christopherschultz.net> wrote:
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> KH,
>
> On 12/9/18 22:10, Kok How Teh wrote:
> > Hi; I use Spring Boot to develop GraphQL applications. However,
> > when the application is packaged as WAR and deployed to Tomcat 9,
> > it throws illegalstate exception. I have tried the workaround by
> > adding a ServletContextAware bean but it doesn't help on Tomcat 9.
> > I have filed 2 issues in separate github projects:
> >
> > https://github.com/eh3rrera/graphql-java-spring-boot-example/issues/10
> #issuecomment-445095690
> <https://github.com/eh3rrera/graphql-java-spring-boot-example/issues/10#issuecomment-445095690>
> >
> >
> > https://github.com/graphql-java-kickstart/graphql-spring-boot/issues/1
> 65
> >
> > It's reported that the exception is only specific to Tomcat 9. Any
> > advice and insight is appreciated.
>
> Spring is throwing the exception. Tomcat ships with the
> javax.websocket.server.ServerContainer class.
>
> I don't believe there are any differences between Tomcat 8.5.x and
> 9.0.x when it comes to ClassLoader layout and class visibility.
>
> I'd ask Spring how they are performing that sanity check to see why
> they are throwing that exception.
>
> - -chris
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