A:

{B,A,C}
B: {B,C}
C: {B,C}

B and C have the same view, but A has a different (older) view which still includes B and C

The new merge now determines that the partition coordinators for the merge are B and A.

When FLUSH is enabled, before handling the merge request A tries to flush {A,B,C} and B tries to flush {B,C}. The latter works, but the former fails as A cannot communicate with B and C !

SOLUTION: the partition for A needs to be {A} and not {B,A,C}

.

Is this possible in all cases, or can we NOT prevent merging of overlapping partitions ? (Then flush would always fail !)