[jira] Updated: (HBASE-3282) Need to retain DeadServers to ensure we don't allow previously expired RS instances to rejoin cluster

["Jonathan Gray (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-3282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Gray updated HBASE-3282:
---------------------------------

    Attachment: HBASE-3282-v4.patch

Unit tests passed.  Committing this final version of the patch.

> Need to retain DeadServers to ensure we don't allow previously expired RS instances to rejoin cluster
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-3282
>                 URL: https://issues.apache.org/jira/browse/HBASE-3282
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.90.0
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>             Fix For: 0.90.0, 0.92.0
>
>         Attachments: HBASE-3282-v4.patch
>
>
> Currently we clear a server from the deadserver set once we finish processing it's shutdown.  However, certain circumstances (network partitions, race conditions) could lead to the RS not doing a check-in until after the shutdown has been processed.  As-is, this RS will now be let back in to the cluster rather than rejected with YouAreDeadException.
> We should hang on to the dead servers so we always reject them.
> One concern is that the set will grow indefinitely.  One recommendation by stack is to use SoftReferences.

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