Hui Xiao 58444eadda Make RateLimiter::GetTotalPendingRequest() non pure virtual for backward compability (#8938)
Summary:
Context/Summary:
https://github.com/facebook/rocksdb/pull/8890 added a public API `RateLimiter::GetTotalPendingRequest()` but mistakenly marked it as pure virtual, forcing RateLimiter's derived classes to implement this function and breaking backward compatibility.

This PR makes `RateLimiter::GetTotalPendingRequest()` as non-pure virtual method by providing a trivial implementation in rate_limiter.h

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8938

Test Plan: Passing existing tests

Reviewed By: pdillinger

Differential Revision: D31100661

Pulled By: hx235

fbshipit-source-id: 06eff1005156a6e5a881e393b2c5b2ad706897d8
2021-09-21 21:29:26 -07:00
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