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http://issues.apache.org/jira/browse/TUSCANY-936?page=comments#action_12450646 
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Jim Marino commented on TUSCANY-936:
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It looks like the session scope container has not been completely integrated 
into the web app runtime and LazyHTTPSessionId was left out. To fix this:

1. Copy over LazyHTTPSessionId from the old code base 
2. In TuscanyRequestListener,  line 61:

runtime.httpRequestStarted(session == null ? null : session.getId());

Instead of passing in a null id, pass in an insance of LazyHTTPSessionId.

3. HttpSessionScopeContainer.getInstanceWrapper() needs to check the id if it 
is an instanceof LazyHTTPSessionId and call getId() on it, and doing a lookup 
on the value returned.

Note calling Servlet.getSession(true) will cause sessions to be created even if 
they are not accessed which may be a performance issue so it is probably best 
that this fix is done. 


> HttpSessionScopeContainer requires a session to exist
> -----------------------------------------------------
>
>                 Key: TUSCANY-936
>                 URL: http://issues.apache.org/jira/browse/TUSCANY-936
>             Project: Tuscany
>          Issue Type: Bug
>          Components: Java SCA Core
>    Affects Versions: Java-Mx
>            Reporter: Greg Dritschler
>            Priority: Minor
>
> In M1, the HttpSessionScopeContainer was able to lazy-initialize an HTTP 
> session.  (Look at the class LazyHTTPSessionId to see how it worked.)  Now 
> the HttpSessionScopeContainer requires a preexisting session.  If a session 
> does not exist, a NullPointerException occurs when it tries to look up the 
> instance using a null key.
> InstanceWrapper ctx = wrappers.get(key);
> The problem can be circumvented by creating a session in the web app client.  
> JSPs have sessions by default.  Servlets can call getSession(true) to ensure 
> a session exists before invoking an SCA component that requires session scope.

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