Hi guys,
  I have a confusion about whether it will lost data when I rolling restart 
Kafka cluster.
  Suppose that Kafka cluster has 4 brokers: A, B, C, D, and 4 partitions of a 
topic which name is  “test-topic”  are allocated on these brokers  with 
balance: p1 for A, p2 for B, p3 for C, p4 for D;
    1 I stop all these brokers.
2 I just restart broker A, and waiting for a few minutes (such as 5 minutes);
  The question is: broker A found that only partition 1 of  “test-topic”  is 
existed(because other brokers are still broken down),  will A abandon the data 
of partition2, 3,4, and recreate these partition?

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