[jboss-jira] [JBoss JIRA] (WFLY-11833) Stateful Session Bean affinity URI instead of cluster

[Richard Achmatowicz (Jira)]

    [ https://issues.jboss.org/browse/WFLY-11833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13728273#comment-13728273 ] 

Richard Achmatowicz edited comment on WFLY-11833 at 4/30/19 9:34 AM:
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I've been looking at this and it may be tricky to fix. A client makes a remote invocation on a SLSB. That SLSB contains an injected reference to a SFSB home interface. The SLSB method uses the home interface to create an instance of the SFSB and return the proxy as a result of the invocation by the client. 
 
The proxy returned by calling create() on the home interface has (strong affinity, weak affinity) = (LOCAL, LOCAL). By the time the proxy gets back to the client, as a return value, it has (strong affinity, weak affinity) = (URI, URI).

Affinity.LOCAL is defined as "the (affinity) specification for the local EJB environment". URIAffinity is defined as "the affinity specification corresponding to the given URI". 

So, if a proxy has its affinity set to LOCAL, then it should not be able to invoke on any bean instances outside of its local EJB environment; which I would understand to the the EJB container it is invoked from (if any). That kind of makes sense, if we create a proxy within a deployment on a server which also has a SFSB deployed; in that case, the proxy is limited to making invocations on that local SFSB. Should this also apply if the bean is clustered? Perhaps. Why? We support fail-over behavior of proxies created from remote clients and created from deployments involving server-to-server clients. Need to clarify.

Certainly, if the proxy created is returned to the client, the affinity needs to be modified; if it were not, the proxy could not be used on the client to invoke on anything as the client does not have a local EJB environment. But how? Should it keep its affinity to that particular bean on that particular server, respecting *the context* in which it was created? Or should it respect the configuration of the bean (say clustered) that it references?
 
Investigating. Maybe the spec has something to say.


was (Author: rachmato):
I've been looking at this and it may be tricky to fix. A client makes a remote invocation on a SLSB. That SLSB contains an injected reference to a SFSB home interface. The SLSB method uses the home interface to create an instance of the SFSB and return the proxy as a result of the invocation by the client. 
 
The proxy returned by calling create() on the home interface has (strong affinity, weak affinity) = (LOCAL, LOCAL). By the time the proxy gets back to the client, as a return value, it has (strong affinity, weak affinity) = (URI, URI).

Affinity.LOCAL is defined as "the (affinity) specification for the local EJB environment". URIAffinity is defined as "the affinity specification corresponding to the given URI". 

So, if a proxy has its affinity set to LOCAL, then it should not be able to invoke on any beans outside of its local EJB environment; which I would understand to the the EJB container it is invoked from (if any). That kind of makes sense, if we create a proxy within a deployment on a server which also has a SFSB deployed; in that case, the proxy is limited to making invocations on that local SFSB. Should this also apply if the bean is clustered? Perhaps. Why? We support fail-over behavior of proxies created from remote clients and created from deployments involving server-to-server clients. Need to clarify.

Certainly, if the proxy created is returned to the client, the affinity needs to be modified; if it were not, the proxy could not be used on the client to invoke on anything as the client does not have a local EJB environment. But how? Should it keep its affinity to that particular bean on that particular server, respecting *the context* in which it was created? Or should it respect the configuration of the bean (say clustered) that it references?
 
Investigating. Maybe the spec has something to say.

> Stateful Session Bean affinity URI instead of cluster
> -----------------------------------------------------
>
>                 Key: WFLY-11833
>                 URL: https://issues.jboss.org/browse/WFLY-11833
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering, EJB
>    Affects Versions: 16.0.0.Final
>         Environment: WildFly cluster having SFSB deployed.
>            Reporter: Joerg Baesner
>            Assignee: Richard Achmatowicz
>            Priority: Major
>              Labels: downstream_dependency
>         Attachments: stateful-timeout.zip
>
>
> Deployed is an application with the following setup:
> * Containing a SFSB (_with passivationCapable="true"_)
> * A SLSB exposing a _remote_ method to a standalone client returning an instance of the SFSB
> Scenario:
> A standalone client is invoking the _remote_ method on the Stateless Session Bean and a new instance of the Stateful Session Bean is returned.
> The issue is that the affinity of the returned Stateful Session Bean is URI instead of Cluster.
> See the attached Gradle reproducer application



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