Rajesh Balamohan created HIVE-15529:
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Summary: LLAP: TaskSchedulerService can get stuck when
scheduleTask returns DELAYED_RESOURCES
Key: HIVE-15529
URL: https://issues.apache.org/jira/browse/HIVE-15529
Project: Hive
Issue Type: Bug
Components: llap
Reporter: Rajesh Balamohan
Priority: Critical
Easier way to simulate the issue:
1. Start hive cli with "--hiveconf hive.execution.mode=llap"
2. Run a sql script file (e.g sql script containing tpc-ds queries)
3. In the middle of the run, press "ctrl+C" which would interrupt the current
job. This should not exit the hive cli yet.
4. After sometime, launch the same SQL script in same cli. This would get stuck
indefinitely (waiting for computing the splits).
Even when cli is quit, AM runs forever until explicitly killed.
Issue seems to be around {{LlapTaskSchedulerService::schedulePendingTasks}}
dealing with the loop when it encounters {{DELAYED_RESOURCES}} on task
scheduling.
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