THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Discussion thread: here
JIRA:The follower starts fetching from the lea
https://issues.apache.org/jira/browse/KAFKA-1211
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4.6 The follower starts fetching from the leader from its log end offset.
4.7.1 During fetching, if the follower sees the LeaderEpoch of a message set larger than its latest LeaderEpoch, it adds the new LeaderEpoch and the starting offset to its LeaderEpochSequence and flushes the file to disk.
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