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Posted to issues@kudu.apache.org by "Mike Percy (JIRA)" <ji...@apache.org> on 2017/09/27 19:54:01 UTC

[jira] [Resolved] (KUDU-2160) Reduce UpdateConsensus RPC timeouts

     [ https://issues.apache.org/jira/browse/KUDU-2160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mike Percy resolved KUDU-2160.
------------------------------
       Resolution: Duplicate
    Fix Version/s: n/a

> Reduce UpdateConsensus RPC timeouts
> -----------------------------------
>
>                 Key: KUDU-2160
>                 URL: https://issues.apache.org/jira/browse/KUDU-2160
>             Project: Kudu
>          Issue Type: Bug
>          Components: consensus
>    Affects Versions: 1.5.0
>            Reporter: Mike Percy
>             Fix For: n/a
>
>
> We will often see many UpdateConsensus() RPC calls time out when disks are slow. We need to investigate this issue further and understand the dynamics better, then find a solution.
> When the local disks on a Kudu cluster get overloaded, RaftConsensus metadata fsyncs caused by Raft votes and term changes take longer, which causes the RaftConsensus lock to be held. This causes "stacking" of UpdateConsensus() RPCs, resulting in timeouts.



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