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Posted to issues@kudu.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2017/09/27 15:16:00 UTC

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

    [ https://issues.apache.org/jira/browse/KUDU-2160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16182716#comment-16182716 ] 

Todd Lipcon commented on KUDU-2160:
-----------------------------------

Does KUDU-1788 not cover this?

> 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
>
> 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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