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https://issues.apache.org/jira/browse/IMPALA-13643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Riza Suminto resolved IMPALA-13643.
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Fix Version/s: Impala 4.5.0
Resolution: Fixed
> HDFS_SCANNER_THREAD_CHECK_SOFT_MEM_LIMIT is ineffective in MT_DOP > 0
> ---------------------------------------------------------------------
>
> Key: IMPALA-13643
> URL: https://issues.apache.org/jira/browse/IMPALA-13643
> Project: IMPALA
> Issue Type: Improvement
> Components: Test
> Reporter: Riza Suminto
> Assignee: Riza Suminto
> Priority: Minor
> Fix For: Impala 4.5.0
>
>
> Debug action HDFS_SCANNER_THREAD_CHECK_SOFT_MEM_LIMIT exist inside
> HdfsScanNode (hdfs-scan-node.cc) code path. MT_DOP > 0 executes using
> HdfsScanNodeMt (hdfs-scan-node-mt.cc) rather than HdfsScanNode, and always
> start single scanner thread per ScanNode. Thus, no need to exercise
> HDFS_SCANNER_THREAD_CHECK_SOFT_MEM_LIMIT and MT_DOP > 0 combination.
> [https://github.com/apache/impala/blob/99529db6ad62ddc34cbfd924d7e41b1fce5b60a2/tests/query_test/test_scanners.py#L70]
>
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