cdbartholomew commented on issue #6054: Catastrophic frequent random topic freezes, especially on high-traffic topics. URL: https://github.com/apache/pulsar/issues/6054#issuecomment-574372062 FWIW, @devinbost I am suspicious of the netty version in the 2.4.X stream. There is a know memory usage issue (https://github.com/netty/netty/issues/8814) 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 netty.
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