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https://issues.apache.org/jira/browse/OFBIZ-4289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13399927#comment-13399927
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Jacopo Cappellato commented on OFBIZ-4289:
------------------------------------------

Jacques,

here are some comments:
a) I did a quick review but it seems that staticContainerConfig is not thread 
safe
b) there are screens in OFBiz that cause issues if the security objects are not 
in the context (when you login/logout and login with a different user in the 
same browser and visit another application): these errors will happen again if 
sessionPersistence is enabled (e.g. in clusters)

Jacopo

PS: I think there are some unwanted changes in your patch:
1) 
{code}
-                <property name="mcast-bind-addr" value="192.168.2.1"/>
+                <property name="mcast-bind-addr" value="192.168.1.8"/>
                 <property name="mcast-addr" value="228.0.0.4"/>
                 <property name="mcast-port" value="45564"/>
                 <property name="mcast-freq" value="500"/>
                 <property name="mcast-drop-time" value="3000"/>
             </property>
-            -->
{code}

2) framework/service/src/org/ofbiz/service/job/JobManager.java.patch

                
> Login out on a cluster handled by DeltaManager causes a NPE
> -----------------------------------------------------------
>
>                 Key: OFBIZ-4289
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-4289
>             Project: OFBiz
>          Issue Type: Bug
>          Components: framework
>    Affects Versions: Release Branch 4.0, Release Branch 09.04, Release Branch 
> 10.04, Release Branch 11.04, SVN trunk
>         Environment: Ubuntu
>            Reporter: Jacques Le Roux
>            Assignee: Jacques Le Roux
>            Priority: Critical
>              Labels: cluster, logout
>             Fix For: Release Branch 10.04, Release Branch 11.04, SVN trunk
>
>         Attachments: OFBIZ-4289_Login_out_on_a 
> cluster_handled_by_DeltaManager_causes_a_NPE.patch, OFBIZ-4289_Login_out_on_a 
> cluster_handled_by_DeltaManager_causes_a_NPE.patch, OFBIZ-4289_Login_out_on_a 
> cluster_handled_by_DeltaManager_causes_a_NPE.patch, changeset_2510.diff
>
>
> It works locally but not on clusters. You simply get a NPE.
> h3. Problem
>     * When we logout we cross an issue due to Tomcat sessions persistence.
>     * Because we set distributable to true, to allow sessions failover,
>     * and use and DeltaManager for replication.
>     * Delegator and other main Classes (notably Dispatcher) are not 
> serialized in OFBiz. This is the origin of the problem 
> h3. Tried solutions
> By default DeltaManager save active sessions on disk. It uses a private 
> String variable pathname for that (default to "SESSIONS.ser"). You can set it 
> to null, to avoid session persistence, using a context.xml file in the 
> WEB-INF folder with content like below. But I tried it in webtools app on 
> staging qs001 (only) and it did not work (with distributable set to false). 
> And we have no other means to set it from OFBiz (OOTB).
> {code}
>     <Context>
>      <Manager className="org.apache.catalina.session.DeltatManager" 
> pathname="">
>      </Manager>
>     </Context>
> {code}

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