[jira] [Created] (HIVE-15529) LLAP: TaskSchedulerService can get stuck when scheduleTask returns DELAYED_RESOURCES

["Rajesh Balamohan (JIRA)" <ji...@apache.org>]

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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