morningman opened a new issue #4254:
URL: https://github.com/apache/incubator-doris/issues/4254


   **Is your feature request related to a problem? Please describe.**
   
   In some very special circumstances, such as code bugs, or human 
misoperation, etc., all replicas of some tablets may be lost. In this case, the 
data has been substantially lost. However, in some scenarios, the business 
still hopes to ensure that the query will not report errors even if there is 
data loss, and reduce the perception of the user layer. At this point, we can 
use the blank Tablet to fill the missing replica to ensure that the query can 
be executed normally.
   
   **Describe the solution you'd like**
   Doris already had this feature, but has some problem, and missing manual doc
   


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