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From "Brandon Williams (Updated) (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-3273) FailureDetector can take a very long time to mark a host down
Date Thu, 29 Sep 2011 17:33:46 GMT


Brandon Williams updated CASSANDRA-3273:

    Component/s:     (was: API)
> FailureDetector can take a very long time to mark a host down
> -------------------------------------------------------------
>                 Key: CASSANDRA-3273
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
> There are two ways to trigger this:
> * Bring a node up very briefly in a mixed-version cluster and then terminate it
> * Bring a node up, terminate it for a very long time, then bring it back up and take
it down again
> In the first case, what can happen is a very short interval arrival time is recorded
by the versioning logic which requires reconnecting and can happen very quickly. This can
easily be solved by rejecting any intervals within a reasonable bound, for instance the gossiper
> The second instance is harder to solve, because what is happening is that an extremely
large interval is recorded, which is the time the node was left dead the first time.  This
throws off the mean of the intervals and causes it to take a much longer time than it should
to mark it down the second time.

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