guojh created HIVE-24467:
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Summary: ConditionalTask remove other tasks exists thread safety
problem
Key: HIVE-24467
URL: https://issues.apache.org/jira/browse/HIVE-24467
Project: Hive
Issue Type: Bug
Components: Hive
Affects Versions: 2.3.4
Reporter: guojh
When hive execute jobs in parallel(control by “hive.exec.parallel” parameter),
ConditionalTasks run parallel to remove the tasks that not pick to run, because
there are thread safety issues, some task may not remove from the dependent
task tree. This is a very serious bug, which causes some stage task not trigger
execution.
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