dengzhhu653 commented on PR #4257:
URL: https://github.com/apache/hive/pull/4257#issuecomment-1588344974
> @dengzhhu653 Thanks for your review. In this patch we want
`AbstractHMSHandlerProxy` become an interface easy to expand other proxy
strategies beyond just "retrying", like timing or something else. It may be
different from `RetryingHMSHandlerHook`, WDYT?
Retrying on transient exception is a good way to reduce the network
roundtrip client retries, besides there has been a property
`hive.hmshandler.retry.attempts` to control the number of retries, e.g, 0 for
disabling the retry mechanism.
Given the template method `AbstractHMSHandlerProxy` provided:
```
protected abstract Result invokeInternal(Object proxy, Method method,
Object[] args)
throws Throwable;
```
Whatever the strategies is, method should is called on the `proxy` in the
child's `invokeInternal`, that's what `RetryingHMSHandler` does currently.
So in my view, if there is no special need to introduce complex strategies
on `method.invoke(proxy, args)`, then let's keep the codes simple.
Thanks,
Zhihua
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