javier-nieto-nexplore commented on issue #2355:
URL: https://github.com/apache/drill/issues/2355#issuecomment-959270652


   Hi @luocooong 
   
   logs are a bit dry :( but I realized that this is related to a config param 
(planner.slice_target), looks like it has to be greater than collection doc 
count, not tested in dist mode though
   
   
![image](https://user-images.githubusercontent.com/83208332/140080676-2cdfab2c-a5d0-41a6-b02a-934dc5c473fb.png)
   
   ```
   2021-11-03 14:27:40,553 [1e7d63a2-9c2f-c629-d5f1-50c47d2ff3b1:foreman] INFO  
o.a.drill.exec.work.foreman.Foreman - Query text for query with id 
1e7d63a2-9c2f-c629-d5f1-50c47d2ff3b1 issued by anonymous: select STREET from 
mongo_local.fake_data_test.frisco
   2021-11-03 14:27:41,848 [1e7d63a2-9c2f-c629-d5f1-50c47d2ff3b1:frag:1:0] INFO 
 o.a.d.e.w.fragment.FragmentExecutor - 
1e7d63a2-9c2f-c629-d5f1-50c47d2ff3b1:1:0: State change requested 
AWAITING_ALLOCATION --> FINISHED
   2021-11-03 14:27:41,848 [1e7d63a2-9c2f-c629-d5f1-50c47d2ff3b1:frag:1:0] INFO 
 o.a.d.e.w.f.FragmentStatusReporter - 1e7d63a2-9c2f-c629-d5f1-50c47d2ff3b1:1:0: 
State to report: FINISHED
   2021-11-03 14:27:41,848 [drill-executor-7] ERROR 
o.a.d.exec.server.BootStrapContext - 
org.apache.drill.exec.work.WorkManager$WorkerBee$1.run() leaked an exception.
   java.lang.NullPointerException: null
        at 
org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:347)
        at 
org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base/java.lang.Thread.run(Thread.java:832)


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