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From "Brandon Williams (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-6961) nodes should go into hibernate when join_ring is false
Date Mon, 31 Mar 2014 20:11:16 GMT
Brandon Williams created CASSANDRA-6961:
-------------------------------------------

             Summary: nodes should go into hibernate when join_ring is false
                 Key: CASSANDRA-6961
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6961
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Brandon Williams
            Assignee: Brandon Williams
             Fix For: 2.0.7


The impetus here is this: a node that was down for some period and comes back can serve stale
information.  We know from CASSANDRA-768 that we can't just wait for hints, and know that
tangentially related CASSANDRA-3569 prevents us from having the node in a down (from the FD's
POV) state handle streaming.

We can *almost* set join_ring to false, then repair, and then join the ring to narrow the
window (actually, you can do this and everything succeeds because the node doesn't know it's
a member yet, which is probably a bit of a bug.)  If instead we modified this to put the node
in hibernate, like replace_address does, it could work almost like replace, except you could
run a repair (manually) while in the hibernate state, and then flip to normal when it's done.

This won't prevent the staleness 100%, but it will greatly reduce the chance if the node has
been down a significant amount of time.



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