[infinispan-issues] [JBoss JIRA] (ISPN-12031) PutMapCommand should only write to shared stores on the primary owners

[Dan Berindei (Jira)]

     [ https://issues.redhat.com/browse/ISPN-12031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dan Berindei closed ISPN-12031.
-------------------------------
    Resolution: Explained


{{PersistenceManagerImpl.writeMapCommand()}} actually does ignore shared stores on backup owners, but the decision is in {{PersistenceManagerImpl.createWriteFlowable().}}

> PutMapCommand should only write to shared stores on the primary owners
> ----------------------------------------------------------------------
>
>                 Key: ISPN-12031
>                 URL: https://issues.redhat.com/browse/ISPN-12031
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Core, Loaders and Stores
>    Affects Versions: 11.0.0.Final, 10.1.8.Final
>            Reporter: Dan Berindei
>            Priority: Major
>             Fix For: 12.0.0.Final
>
>
> {{DistCacheWriterInterceptor}} uses {{skipSharedStores()}} for single-key write commands and multi-key functional commands in order to write to shared stores only on the primary owner of the key. For {{PutMapCommand}} it uses {{PersistenceManagerImpl.writeMapCommand()}}, which does not distinguish between shared and non-shared stores.
>  
> In addition to being inefficient, this makes it possible for a backup owner to update the value in the shared store after the primary owner released the lock, potentially out of order with another write operation (especially if the other write operation is single-key, so it only writes to the shared store from the primary).



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