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https://issues.apache.org/jira/browse/IMPALA-9151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Volker resolved IMPALA-9151.
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Fix Version/s: Impala 3.4.0
Resolution: Fixed
> Number of executors during planning needs to account for suspended executor
> groupa
> ----------------------------------------------------------------------------------
>
> Key: IMPALA-9151
> URL: https://issues.apache.org/jira/browse/IMPALA-9151
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Reporter: Lars Volker
> Assignee: Lars Volker
> Priority: Major
> Fix For: Impala 3.4.0
>
>
> When configuring Impala with executor groups, the planner might see a
> {{ExecutorMembershipSnapshot}} that has no executors in it. This can happen
> if the first executor group has not started up yet, or if all executor groups
> have been shutdown. If this happens, the planner will make sub-optimal
> decisions, e.g. decide on a broadcast join vs a PHJ. In the former case, we
> should have a configurable fallback cluster size to use during planning. In
> the latter case, we should hang on to the last executor group size that we
> had observed.
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