I think this is a good idea for the reasonable use of pulsar threads.

Thanks,
Cong Zhao

On 2023/04/18 02:07:55 mattisonc...@gmail.com wrote:
> 
> Hello, folks.
> 
> I would like to start discussing the pulsar internal thread pool sorting out.
> 
> How did I get this idea?
> 
> Recently, we met some problems with the BK operation timeout. After 
> investigating, we found an issue that is we share the IO executor(workgroup) 
> with the Bookkeeper client and internal client and do some other async task 
> in the dispatcher or somewhere to avoid deadlock.
> 
> But the problem over here. If we use this executor to do some kind of 
> `blocking`(or spend much time computing. e.g. reply to many delayed messages) 
> operation, it will block BK clients from sending requests if they are using 
> the same thread.
> 
> And then, I checked all the usage of the thread pool. We need the rule to 
> constrain what thread pool we should use.
> 
> What am I expecting?
> 
> I want to collect all the thread pools and define a clear usage guide to 
> avoid wrong use and improve the fault tolerance(the component problem 
> shouldn't affect the whole broker)
> 
> 
> 
> I need to hear your guy's opinions. Please feel free to leave any questions. 
> Thanks!
> 
> 
> Best,
> Mattison
> 
> 
> 

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