[jboss-jira] [JBoss JIRA] (WFLY-6064) Distributed SFSB cache entries may rehash to different nodes following topology change

[Radoslav Husar (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-6064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13157825#comment-13157825 ] 

Radoslav Husar commented on WFLY-6064:
--------------------------------------

Tangent failure in CI:
http://brontes.lab.eng.brq.redhat.com/viewLog.html?buildId=87591&tab=buildResultsDiv&buildTypeId=WF_WildFlyCoreIntegrationExperiments
https://gist.github.com/rhusar/380c8ecb0a03d1284f86

> Distributed SFSB cache entries may rehash to different nodes following topology change
> --------------------------------------------------------------------------------------
>
>                 Key: WFLY-6064
>                 URL: https://issues.jboss.org/browse/WFLY-6064
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering
>    Affects Versions: 10.0.0.CR5
>            Reporter: Paul Ferraro
>            Assignee: Paul Ferraro
>
> A distributed SFSB is stored in 2 cache entries, one mapping the bean ID to a serialization group ID, and another mapping the group ID to a map of bean instances.
> We ensure that both cache entries will hash to the local node, but following a topology change, these entries could get re-mapped to different nodes.
> If we made the group ID = the bean Id of the first bean in the group, this solves the problem for 90% of use cases.



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