cdbartholomew commented on issue #6054: Catastrophic frequent random topic 
freezes, especially on high-traffic topics.
   FWIW, @devinbost I am suspicious of the netty version in the 2.4.X stream. 
There is a know memory usage issue ( 
in the 4.1.32 version of netty that is used in the stream. When I was testing, 
I would see issues like you are describing. Then I patched in the latest 
version of netty, and things seemed better. I have been running with a patched 
2.4.2 for a while and have not seen any issues. You may be experiencing 
something completely different, but it might be worth trying 2.4.2 + latest 

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