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From "Stu Hood (JIRA)" <>
Subject [jira] Assigned: (CASSANDRA-640) Repair should never reuse a tree
Date Fri, 18 Dec 2009 03:56:18 GMT


Stu Hood reassigned CASSANDRA-640:

    Assignee: Stu Hood

> Repair should never reuse a tree
> --------------------------------
>                 Key: CASSANDRA-640
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.5
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>             Fix For: 0.5
> AEService currently 'caches' MerkleTrees that have been generated by the local node,
and can respond to a request for a tree with a cached version. This means that despite possibly
having performed a repair, the two nodes will still be holding cached trees, and can respond
to one another with the cached version, resulting in redundant repairs.
> Rather than a cache, the map of trees is intended to be a rendezvous point for two nodes
to exchange relatively up-to-date trees. A map still might work, but other synchronization
objects should be explored.

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