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From "Kurt Greaves (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-14309) Make hint window persistent across restarts
Date Tue, 13 Mar 2018 02:53:00 GMT
Kurt Greaves created CASSANDRA-14309:
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             Summary: Make hint window persistent across restarts
                 Key: CASSANDRA-14309
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14309
             Project: Cassandra
          Issue Type: Improvement
          Components: Hints
            Reporter: Kurt Greaves
            Assignee: Kurt Greaves


The current hint system stores a window of hints as defined by {{max_hint_window_in_ms}},
however this window is not persistent across restarts.

Examples (cluster with RF=3 and 3 nodes, A, B, and C):
 # A goes down
 # X ms of hints are stored for A on B and C
 # A is restarted
 # A goes down again without hints replaying from B and C
 # B and C will store up to another {{max_hint_window_in_ms}} of hints for A

 
 # A goes down
 # X ms of hints are stored for A on B and C
 # B is restarted
 # B will store up to another {{max_hint_window_in_ms}} of hints for A

 

Note that in both these scenarios they can continue forever. If A or B keeps getting restarted
hints will continue to pile up.

 

Idea of this ticket is to stop this behaviour from happening and only ever store up to {{max_hint_window_in_ms}}
of hints for a particular node.



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