NealSun96 opened a new issue #972:
URL: https://github.com/apache/helix/issues/972


   We are improving the task framework by allowing task thread pools to have 
configurable sizes. As a part of the participant side change, 
`TaskStateModelFactory` is changed to allocate thread pool sizes based on 
values provided in `InstanceConfig` or `ClusterConfig`. 
   
   Both `InstanceConfig` and `ClusterConfig` are now expected to contain a 
field keyed as "TARGET_TASK_THREAD_POOL_SIZE", where the value for 
`InstanceConfig` only determines the thread pool size for the specified 
instance, and the value for `ClusterConfig` determins the thread pool sizes for 
all instances of that clsuter. If `InstanceConfig` isn't able to provide the 
pool size, then `ClusterConfig` will be used to determine the pool size; if 
neither of them are able to provide the pool size, `TaskStateModelFactory` will 
use a default value. 


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