Segments overlap error (refactor write conflict exception)

when "updateCubeWithRetry" method be called at first time ,

line newSegs.validate();was passed .

then 

cube = crud.save(cube);seem with error throw exception

write conflict to update cube xxxx at try 0 ,will retry...

while retry "updateCubeWithRetry" start

line newSegs.validate();was not passed .

throw exception 

Segments overlap: xxxx[20180318000000_20180319000000] and sales_order_channel[20180318000000_201803
19000000]