[weld-issues] [JBoss JIRA] (WELD-59) Clustered WebBeans, no support for sessionscoped (and higher) replication

[Ales Justin (JIRA)]

     [ https://issues.jboss.org/browse/WELD-59?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ales Justin resolved WELD-59.
-----------------------------

    Resolution: Out of Date

    
> Clustered WebBeans, no support for sessionscoped (and higher) replication
> -------------------------------------------------------------------------
>
>                 Key: WELD-59
>                 URL: https://issues.jboss.org/browse/WELD-59
>             Project: Weld
>          Issue Type: Bug
>          Components: Scopes & Contexts
>    Affects Versions: 1.0.0.PREVIEW1 
>         Environment: JBoss AS 5.1 + JDK 6
>            Reporter: John Ament
>             Fix For: TBC
>
>         Attachments: ClusteredWebBeansTestApp.zip, ClusteredWebBeansTestApp.zip
>
>
> From what I can tell, this is what happens.
> Assume you have a 2 node environment w/ apache httpd + mod_jk in front of the jboss servers, used to limit servers exposed + a loadbalancer (F5 ASM) in front of those.  The apache servers are only configured to talk to one jboss server each (httpd + jboss are on same box, they only talk to the local client).  the f5 serving the initial request is configured for pure round robin (no cookie persistence) and as a result request 1 could go to server 1 and then request 2 goes to server 2.
> Now assume that the two jboss servers are clustered together, the EJBs are clustered and have a cache policy (based on the JBoss annotations).  They only have local interfaces.  In addition, there are some classes that are only POJOs; but they sit in the ejb module.  Based on what's happening these objects should be replicated as part of the HTTP session state.
> A few problems seem to occur when the request goes to the second server after the first request goes to the first server.
> 1. References to the resources required by the EJBs are not injected in the second server.  This includes members decorated @Resource or @PersistenceContext
> 2. References to EJBs required at the view level are not restored.
> In addition, concurrent modification exceptions seem to be more likely when deployed like this, resulting in having to downgrade EJBs to POJOs in order to remain stateful.

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