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Posted to issues-all@impala.apache.org by "Michael Ho (JIRA)" <ji...@apache.org> on 2018/11/27 22:43:00 UTC
[jira] [Assigned] (IMPALA-2990) Coordinator should timeout a
connection for an unresponsive backend
[ https://issues.apache.org/jira/browse/IMPALA-2990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Ho reassigned IMPALA-2990:
----------------------------------
Assignee: Thomas Tauber-Marshall (was: Michael Ho)
> Coordinator should timeout a connection for an unresponsive backend
> -------------------------------------------------------------------
>
> Key: IMPALA-2990
> URL: https://issues.apache.org/jira/browse/IMPALA-2990
> Project: IMPALA
> Issue Type: Bug
> Components: Distributed Exec
> Affects Versions: Impala 2.3.0
> Reporter: Sailesh Mukil
> Assignee: Thomas Tauber-Marshall
> Priority: Critical
> Labels: hang, observability, supportability
>
> The coordinator currently waits indefinitely if it does not hear back from a backend. This could cause a query to hang indefinitely in case of a network error, etc.
> We should add logic for determining when a backend is unresponsive and kill the query. The logic should mostly revolve around Coordinator::Wait() and Coordinator::UpdateFragmentExecStatus() based on whether it receives periodic updates from a backed (via FragmentExecState::ReportStatusCb()).
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