[GitHub] [incubator-doris] liutang123 edited a comment on issue #4104: No available BE to choose when repair

[GitBox <gi...@apache.org>]

liutang123 edited a comment on issue #4104:
URL: https://github.com/apache/incubator-doris/issues/4104#issuecomment-661555852


   > > There are A, B, C and D 4 BEs.
   > > tablet t has 3 replicas in A(good), B(good) and C(version miss).
   > > If now mark D as decommissioned. FE will never delete replica in C and can not choose D to create new replica.
   > 
   > I think this case will fall into this branch:
   > 
   > https://github.com/apache/incubator-doris/blob/2de4f2471bd729e9f723ca8cdd5d9abfe69bf8eb/fe/src/main/java/org/apache/doris/catalog/Tablet.java#L476-L478
   > 
   > So it can not run to the code you modified in #4105
   
   Sorry, I skip a step.
   Think about follows:
   There are A, B, C and D 4 BEs.
   tablet t has 3 replicas in A(good), B(good) and C(version miss).
   Choose D to create new replica, A(good), B(good) and C(version miss), D(good).
   Now, `aliveAndVersionComplete` is equal to `replicationNum`.
   If decommission D before delete replica in C, repair will hang.


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