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Posted to issues-all@impala.apache.org by "Tianyi Wang (JIRA)" <ji...@apache.org> on 2018/09/18 23:40:00 UTC

[jira] [Commented] (IMPALA-7532) Add retry/back-off to fetch-from-catalog RPCs

    [ https://issues.apache.org/jira/browse/IMPALA-7532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16619890#comment-16619890 ] 

Tianyi Wang commented on IMPALA-7532:
-------------------------------------

[~vukercegovac] Do you know the details about the problem? AFAIK the main RPC used by fetch-from-catalogd is GetPartialCatalogObject, which has retrial mechanisms in catalog-op-executor.cc

> Add retry/back-off to fetch-from-catalog RPCs
> ---------------------------------------------
>
>                 Key: IMPALA-7532
>                 URL: https://issues.apache.org/jira/browse/IMPALA-7532
>             Project: IMPALA
>          Issue Type: Sub-task
>            Reporter: Todd Lipcon
>            Assignee: Tianyi Wang
>            Priority: Major
>
> Currently if there is an error connecting to the catalog server, the 'fetch from catalog' implementation will retry with no apparent backoff. We should retry for some period of time with backoff in between the attempts, so that impala can ride over short interruptions of the catalog service.



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