Tamas Mate created IMPALA-12809:
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Summary: Iceberg metadata table scanner can be scheduled to
executors
Key: IMPALA-12809
URL: https://issues.apache.org/jira/browse/IMPALA-12809
Project: IMPALA
Issue Type: Bug
Components: Backend
Affects Versions: Impala 4.4.0
Reporter: Tamas Mate
On larger clusters the Iceberg metadata scanner can be scheduled to executors,
for example during a join. The fragment in this case will fail a precondition
check, because either the frontend_ object will not be present or the table.
Setting {{exec_at_coord}} to true is not enough and these fragments should be
scheduled to the {{coord_only_executor_group}}.
Additionally, setting NUM_NODES=1 should be a viable workaround.
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