Flink batch processing fault tolerance

[Renjie Liu]

Hi, all:
I'm learning flink's doc and curious about the fault tolerance of batch
process jobs. It seems that when one of task execution fails, the whole job
will be restarted, is it true? If so, isn't it impractical to deploy large
flink batch jobs?
-- 
Liu, Renjie
Software Engineer, MVAD