[jira] [Updated] (KUDU-2348) Java client doesn't pick a random replica when no replica is local

["Alexey Serbin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KUDU-2348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Serbin updated KUDU-2348:
--------------------------------
    Code Review: https://gerrit.cloudera.org/#/c/12158/

> Java client doesn't pick a random replica when no replica is local
> ------------------------------------------------------------------
>
>                 Key: KUDU-2348
>                 URL: https://issues.apache.org/jira/browse/KUDU-2348
>             Project: Kudu
>          Issue Type: Improvement
>          Components: client, java
>    Affects Versions: 1.7.0
>            Reporter: Todd Lipcon
>            Assignee: YifanZhang
>            Priority: Major
>              Labels: newbie
>             Fix For: 1.11.0
>
>
> In RemoteTablet we have this comment:
> {code}
>    * Get the information on the closest server. If none is closer than the others,
>    * return the information on a randomly picked server.
> {code}
> However it appears that the "random" replica is deterministic - it's always the last replica in hashmap iteration order, which is likely to be the same order across all clients in the cluster. That would cause load to be concentrated on one replica rather than spread even if the clients are meaning to spread the load.



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