[jira] [Created] (DRILL-6793) FragmentExecutor cannot send its final state for the case when RootExec root wasn't initialized

["Volodymyr Vysotskyi (JIRA)" <ji...@apache.org>]

Volodymyr Vysotskyi created DRILL-6793:
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             Summary: FragmentExecutor cannot send its final state for the case when RootExec root wasn't initialized
                 Key: DRILL-6793
                 URL: https://issues.apache.org/jira/browse/DRILL-6793
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.15.0
            Reporter: Volodymyr Vysotskyi
            Assignee: Bohdan Kazydub
             Fix For: 1.15.0


*Problem description*
For the case when the exception was thrown during [initializing {{RootExec root}}|https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/work/fragment/FragmentExecutor.java#L264], after that {{root.dumpBatches()}} is called in {{FragmentExecutor.cleanup()}} method, so NPE will be thrown before releasing the resources and sending the final state.
{noformat}
20:11:22.910 [243f2a45-cd8a-b3f8-3d5d-36fdbe8fb446:frag:0:0] ERROR o.a.d.exec.server.BootStrapContext - org.apache.drill.exec.work.WorkManager$WorkerBee$2.run() leaked an exception.
Exception in thread "243f2a45-cd8a-b3f8-3d5d-36fdbe8fb446:frag:0:0" java.lang.NullPointerException
	at org.apache.drill.exec.work.fragment.FragmentExecutor.cleanup(FragmentExecutor.java:211)
	at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:330)
	at org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
java.lang.NullPointerException: null
	at org.apache.drill.exec.work.fragment.FragmentExecutor.cleanup(FragmentExecutor.java:211) ~[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:330) ~[classes/:na]
	at org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38) ~[classes/:na]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_181]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
{noformat}

*Simple reproduce*
Throw the exception in the constructor of {{ParquetRecordReader}} and run any parquet test, for example {{TestParquetMetadataCache.testPartitionPruningWithMetadataCache_1()}}



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