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Date: Tue, 1 Oct 2013 15:12:24 +0000 (UTC)
From: "Jonathan Ellis (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12664534.1376954981260.11364.1380640344516@arcas>
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Subject: [jira] [Assigned] (CASSANDRA-5902) Dealing with hints after a
 topology change
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     [ https://issues.apache.org/jira/browse/CASSANDRA-5902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis reassigned CASSANDRA-5902:
-----------------------------------------

    Assignee: Jonathan Ellis  (was: Yuki Morishita)

> Dealing with hints after a topology change
> ------------------------------------------
>
>                 Key: CASSANDRA-5902
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5902
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>
> Hints are stored and delivered by destination node id.  This allows them to survive IP changes in the target, while making "scan all the hints for a given destination" an efficient operation.  However, we do not detect and handle new node assuming responsibility for the hinted row via bootstrap before it can be delivered.
> I think we have to take a performance hit in this case -- we need to deliver such a hint to *all* replicas, since we don't know which is the "new" one.  This happens infrequently enough, however -- requiring first the target node to be down to create the hint, then the hint owner to be down long enough for the target to both recover and stream to a new node -- that this should be okay.


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