[infinispan-issues] [JBoss JIRA] (ISPN-2353) Allow KOut/VOut emitting Mapper where VOut is null

[Vladimir Blagojevic (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-2353?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Blagojevic updated ISPN-2353:
--------------------------------------

    Summary: Allow KOut/VOut emitting Mapper where VOut is null  (was: Allow non-emitting Mapper  )

    
> Allow KOut/VOut emitting Mapper where VOut is null
> --------------------------------------------------
>
>                 Key: ISPN-2353
>                 URL: https://issues.jboss.org/browse/ISPN-2353
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Distributed Execution and Map/Reduce
>    Affects Versions: 5.2.0.Alpha4
>            Reporter: Vladimir Blagojevic
>            Assignee: Vladimir Blagojevic
>             Fix For: 5.2.0.Beta1, 5.2.0.Final
>
>
> In some cases Mapper being executed on remote nodes might not produce any intermediate KOut/VOut pairs and we should allow/account for that possibility. Currently such tasks fail with NPE. 

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