[jboss-jira] [JBoss JIRA] (WFLY-9541) Storing a LinkedHashMap subclass in the session breaks replication.

[Klaasjan Brand (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-9541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Klaasjan Brand updated WFLY-9541:
---------------------------------
           Description: 
Context: trying to get one of our applications to work with Wildfly session replication.
After trying out a build from the Wildfly master branch to test another bug I submitted I noticed another issue which works fine in the Wildfly 11 release.

Our application has a custom LinkedHashMap subclass (MostRecentlyUsedMap) which it stores in the session. It also keeps a reference to the subclass since that one has a few extra fields.
When marshalling the session the MostRecentlyUsedMap is converted to a LinkedHashMap. When unmarshalling the session this causes an error since the field is of the subclass type.

This behaviour is new in WF 12 and is related to this commit:
https://github.com/wildfly/wildfly/commit/143527f595206c5f2bf037b47c797f052cbe5d2
(fix for the WFLY-9497 issue).



  was:
Context: trying to get one of our applications to work with Wildfly session replication.
After trying out a build from the Wildfly master branch to test another bug I submitted I noticed another issue which works fine in the Wildfly 11 release.

Our application has a custom LinkedList subclass (MostRecentlyUsedList) which it stores in the session. It also keeps a reference to the subclass since that one has a few extra fields.
When marshalling the session the MostRecentlyUsedList is converted to a LinkedList. When unmarshalling the session this causes an error since the field is of the subclass type.

This behaviour is new in WF 12 and is related to this commit:
https://github.com/wildfly/wildfly/commit/143527f595206c5f2bf037b47c797f052cbe5d2
(fix for the WFLY-9497 issue).



    Steps to Reproduce: 
Store a LinkedHashMap subclass in the session and try to do a failover.
Expected result is the replicated session is restored an work continues.
Actual result is an exception and error page.


  was:
Store a LinkedList subclass in the session and try to do a failover.
Expected result is the replicated session is restored an work continues.
Actual result is an exception and error page.


               Summary: Storing a LinkedHashMap subclass in the session breaks replication.  (was: Storing a LinkedList subclass in the session breaks replication.)


> Storing a LinkedHashMap subclass in the session breaks replication.
> -------------------------------------------------------------------
>
>                 Key: WFLY-9541
>                 URL: https://issues.jboss.org/browse/WFLY-9541
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering
>    Affects Versions: 12.0.0.Alpha1
>         Environment: Tested on JDK 1.8.0_152 on OS X 10.12
>            Reporter: Klaasjan Brand
>            Assignee: Paul Ferraro
>
> Context: trying to get one of our applications to work with Wildfly session replication.
> After trying out a build from the Wildfly master branch to test another bug I submitted I noticed another issue which works fine in the Wildfly 11 release.
> Our application has a custom LinkedHashMap subclass (MostRecentlyUsedMap) which it stores in the session. It also keeps a reference to the subclass since that one has a few extra fields.
> When marshalling the session the MostRecentlyUsedMap is converted to a LinkedHashMap. When unmarshalling the session this causes an error since the field is of the subclass type.
> This behaviour is new in WF 12 and is related to this commit:
> https://github.com/wildfly/wildfly/commit/143527f595206c5f2bf037b47c797f052cbe5d2
> (fix for the WFLY-9497 issue).



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