Youngwb opened a new issue #3868:
URL: https://github.com/apache/incubator-doris/issues/3868


   **Describe the bug**
   BE will core when user query table which contains HLL data and it's write by 
old version(maybe 0.10),  This bug happens occasionally, not always
   
   **Screenshots**
   
![image](https://user-images.githubusercontent.com/9495145/84635030-3a995700-af25-11ea-9b12-5b7e82d445b6.png)
   
   
   **Additional context**
   According to the core file, the reason is that when HyperLogLog initialized 
with Slice, the Slice's data pointed to an invalid address, causing be to 
crash.  And the address 0x2c87f2031 is used to Identifies whether the cell is 
NULL
   


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