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https://issues.apache.org/jira/browse/TEZ-4238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Bodor updated TEZ-4238:
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Description:
In HIVE-24207, an optimization is introduced on task side, where a task can
exit quickly if it's needed according to an object cache value, which reflects
the current records already pushed through the limit operator.
The AM side optimization will more likely be TEZ-2103 for the scenario.
Early exit can cause uninitialized inputs, that's what this patch is meant to
solve.
> Check null mrReader in MRInput.close
> ------------------------------------
>
> Key: TEZ-4238
> URL: https://issues.apache.org/jira/browse/TEZ-4238
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
>
> In HIVE-24207, an optimization is introduced on task side, where a task can
> exit quickly if it's needed according to an object cache value, which
> reflects the current records already pushed through the limit operator.
> The AM side optimization will more likely be TEZ-2103 for the scenario.
> Early exit can cause uninitialized inputs, that's what this patch is meant to
> solve.
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