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https://issues.apache.org/jira/browse/HDFS-17508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Íñigo Goiri resolved HDFS-17508.
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    Fix Version/s: 3.5.0
     Hadoop Flags: Reviewed
         Assignee: Danny Becker
       Resolution: Fixed

> RBF: MembershipStateStore can overwrite valid records when refreshing the 
> local cache
> -------------------------------------------------------------------------------------
>
>                 Key: HDFS-17508
>                 URL: https://issues.apache.org/jira/browse/HDFS-17508
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: rbf
>    Affects Versions: 3.3.4
>            Reporter: Danny Becker
>            Assignee: Danny Becker
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.5.0
>
>
> When the MembershipStore refreshes its cache, it will also call the 
> overrideExpiredRecords() method, which will write the Expired state back to 
> the state store. Due to a race condition this logic can overwrite valid 
> records. overrideExpiredRecords should first check if the state of the record 
> is already set to "EXPIRED" before it writes the record to the state store.



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