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Posted to issues-all@impala.apache.org by "Lars Volker (JIRA)" <ji...@apache.org> on 2019/03/12 15:47:00 UTC

[jira] [Commented] (IMPALA-8302) Data stream senders should buffer limited amount of data when receivers block

    [ https://issues.apache.org/jira/browse/IMPALA-8302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16790673#comment-16790673 ] 

Lars Volker commented on IMPALA-8302:
-------------------------------------

CC [~tarmstrong@cloudera.com]

> Data stream senders should buffer limited amount of data when receivers block
> -----------------------------------------------------------------------------
>
>                 Key: IMPALA-8302
>                 URL: https://issues.apache.org/jira/browse/IMPALA-8302
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend, Distributed Exec
>    Affects Versions: Impala 3.2.0
>            Reporter: Lars Volker
>            Priority: Major
>
> Exchanges into blocking nodes (e.g. sort nodes during run formation) can block the whole execution if a single node blocks. Data stream senders should buffer a limited amount of data to allow more sort nodes to start sorting their data. Possible options would be a fixed amount of buffer size, or a size relative to the sort node run size.



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