[infinispan-issues] [JBoss JIRA] (ISPN-3737) L1 requestor registered after value read

[William Burns (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-3737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12927144#comment-12927144 ] 

William Burns commented on ISPN-3737:
-------------------------------------

Good catch!  Normally just putting the registration of the requestor before the get completes would have an inverse effect (we could invalidate something that isn't present), but because of the L1 rewrite to not store L1 values if a concurrent invalidation occurs while waiting on a remote get, that should be a more than feasible fix.
                
> L1 requestor registered after value read
> ----------------------------------------
>
>                 Key: ISPN-3737
>                 URL: https://issues.jboss.org/browse/ISPN-3737
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Distributed Cache
>    Affects Versions: 6.0.0.Final
>            Reporter: Radim Vansa
>            Assignee: William Burns
>            Priority: Critical
>              Labels: 620
>
> As the L1 requestor is registered only after the value is retrieved from data container, the (transactional) update of the value may not invalide the entry after write and the cache gets inconsistent.
> Consider this interleaving of operations (G=get request from other node, C=commit)
> R: read value -> old value
> C: update old -> new
> C: notify requestors for key
> R: add requestor for key

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