[jira] [Resolved] (CASSANDRA-2394) Faulty hd kills cluster performance

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-2394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis resolved CASSANDRA-2394.
---------------------------------------

       Resolution: Not A Problem
    Fix Version/s:     (was: 0.7.7)

> Faulty hd kills cluster performance
> -----------------------------------
>
>                 Key: CASSANDRA-2394
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2394
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.7.4
>            Reporter: Thibaut
>            Priority: Minor
>
> Hi,
> About every week, a node from our main cluster (>100 nodes) has a faulty hd  (Listing the cassandra data storage directoy triggers an input/output error).
> Whenever this occurs, I see many timeoutexceptions in our application on various nodes which cause everything to run very very slowly. Keyrange scans just timeout and will sometimes never succeed. If I stop cassandra on the faulty node, everything runs normal again.
> It would be great to have some kind of monitoring thread in cassandra which marks a node as "down" if there are multiple read/write errors to the data directories. A single faulty hd on 1 node shouldn't affect global cluster performance.

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