poorbarcode opened a new pull request, #18228:
URL: https://github.com/apache/pulsar/pull/18228

   Fix: #17011
   
   ### Motivation
   
   1. In this test, make a batch of messages is acked, and make the remaining 
messages are redelivered, then try to receive the redelivered messages again. 
However, the sequence num is used for `cmd-ack`. But if the order of the 
messages changes, the acked messages will not be the expected messages, which 
makes the test unstable.
   
   ![截屏2022-09-02 12 15 
36](https://user-images.githubusercontent.com/25195800/188057817-b165969e-1b4a-435e-b548-dd2b8a20a3ad.png)
   
   2. There is a bug that caused repeated consumption, PR 
https://github.com/apache/pulsar/pull/18227 has fixed it.
   
   #### Changes
   
   Use the message content to determine whether the message should `ack`.
   
   
   ### Documentation
   
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   - [ ] `doc` <!-- Your PR contains doc changes. Please attach the local 
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   - [ ] `doc-required` <!-- Your PR changes impact docs and you will update 
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   - [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
   - [ ] `doc-complete` <!-- Docs have been already added -->
   
   ### Matching PR in forked repository
   
   PR in forked repository: 
   - https://github.com/poorbarcode/pulsar/pull/32
   


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