HongLiang created KAFKA-6306:
--------------------------------

             Summary: Auto-commit of offsets fail, and not recover forever...
                 Key: KAFKA-6306
                 URL: https://issues.apache.org/jira/browse/KAFKA-6306
             Project: Kafka
          Issue Type: Bug
          Components: clients, consumer
    Affects Versions: 1.0.0, 0.10.2.1
            Reporter: HongLiang
         Attachments: _883ddf50-beb7-4e87-9630-168acaa9b046.png, 
e6cf53be-e128-47dc-a45a-79439a9e55ff.png

Auto-commit of offsets fail, and not recover forever. at 
sendOffsetCommitRequest, while "generation equal NULL", ConsumerCoordinator 
request will fail always. it maybe a bug. error log below:
has more and more warn log ....
"2017-12-01 22:08:39.112 WARN pool-390-thread-1#1 
(ConsumerCoordinator.java:626) - Auto-commit of offsets 
{drawing_gift_sent-1=OffsetAndMetadata{offset=32150359, metadata=''}} failed 
for group gift_rich_audience_write: Commit cannot be completed since the group 
has already rebalanced and assigned the partitions to another member. This 
means that the time between subsequent calls to poll() was longer than the 
configured max.poll.interval.ms, which typically implies that the poll loop is 
spending too much time message processing. You can address this either by 
increasing the session timeout or by reducing the maximum size of batches 
returned in poll() with max.poll.records."
!e6cf53be-e128-47dc-a45a-79439a9e55ff.png|thumbnail!
!_883ddf50-beb7-4e87-9630-168acaa9b046.png|thumbnail!



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