poorbarcode commented on PR #18491:
URL: https://github.com/apache/pulsar/pull/18491#issuecomment-1318872660

   Hi @BewareMyPower 
   
   > We can avoid sleeping by calling redeliverUnacknowledgedMessages in the 
internal pinned executor. 
   
   Yes, you are right. This is definitely a good idea, and I tried it in the 
previous 
[commit](https://github.com/apache/pulsar/pull/18491/commits/399d76ad4ca3f767411b4707a39584c669f15537),
 but it didn't make more present of failure than `sleep`, so I ended up using 
sleep instead.
   
   <img width="1288" alt="截屏2022-11-18 00 08 17" 
src="https://user-images.githubusercontent.com/25195800/202497743-89c076ac-8114-4196-bb0a-a82847bcab33.png";>
   
   Here's why:https://github.com/apache/pulsar/pull/18491#discussion_r1024337980
   


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