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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2019/01/09 01:05:51 UTC

[GitHub] jonnxu commented on issue #61: [ISSUE#43] One Consumer Consume One Message Twice at the same time

jonnxu commented on issue #61: [ISSUE#43] One Consumer Consume One Message Twice at the same time
URL: https://github.com/apache/rocketmq-client-cpp/pull/61#issuecomment-452520656
 
 
   #43 One Consumer Consume One Message Twice At The Same Time
   
   the reason for this issue is:
   after broker restart, consumer will dorebalance, when drop mq(broker_b, queue=3) but doesn't delete the pull message(opaque=392989) it have send to broker,
   after a while(08:57:11.515914) when mq (broker_b, queue=3) allocate to this consumer again, it will trigger pull reqeust to this mq((broker-b, queue=3))
   after a while again (08:57:15.911154), consumer receive the response for this pull message(opaque=392989), it will trigger consumer send another pull request to this mq(broker-b, queue=3)
   so, there are two pull reqeust to one mq(broker-b, queue=3) at the same time

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