[infinispan-issues] [JBoss JIRA] (ISPN-2362) Remove-inconsistency during NBST

[Mircea Markus (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-2362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mircea Markus updated ISPN-2362:
--------------------------------

    Priority: Blocker  (was: Critical)

    
> Remove-inconsistency during NBST
> --------------------------------
>
>                 Key: ISPN-2362
>                 URL: https://issues.jboss.org/browse/ISPN-2362
>             Project: Infinispan
>          Issue Type: Bug
>          Components: State transfer
>    Affects Versions: 5.2.0.Alpha3
>            Reporter: Mircea Markus
>            Assignee: Adrian Nistor
>            Priority: Blocker
>             Fix For: 5.2.0.CR1
>
>
> The NBST functionality leaves place to inconsistencies during removals:
> 1. the joiner first requests transaction data
> 2. after all transaction data is integrated (i.e. tx is prepared on the state receiver node) it requests the rest(data container) of the data 
> 3. in order not to override the data from transactions which is more recent (transactions at step 1 might commit during step 2), the insertion at 2 happens with putIfAbsent. Whilst this prevents from overriding newer values (written by transactions), it doesn't guard against the situation in which the tx at step 1 removed data. So it is possible for deleted data a to resurrect. 
> A solution to this inconsistency issue is to use tombstones for the duration of the state transfer. 

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