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https://issues.apache.org/jira/browse/IMPALA-9636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sahil Takiar reassigned IMPALA-9636:
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Assignee: Wenzhe Zhou
> Retried queries that blacklist nodes should ensure they don't run on the
> blacklisted node
> -----------------------------------------------------------------------------------------
>
> Key: IMPALA-9636
> URL: https://issues.apache.org/jira/browse/IMPALA-9636
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Sahil Takiar
> Assignee: Wenzhe Zhou
> Priority: Critical
>
> When a query is retried due to a node blacklisting event, there is no
> guarantee that the retried query will *not* run on the blacklisted node. When
> a node is blacklisted, it is only placed on the blacklist for a certain
> period of time (the first time it is blacklisted I think it is only about 12
> seconds). It is possible that retrying the query takes a while (perhaps the
> query has to wait in the admission control queue again). So it is possible
> that the retried query will end up running on the node that it blacklisted
> during its original attempt, which is probably unwise because that node
> caused the query to fail.
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