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                                            jiangzhchyeah

least_request LB strategy causes full TPS drop when upstream endpoint hang

Hi @ejona86 , here is my reproduce step, it might explain why there is **_a complete TPS drop when a single upstream endpoint hangs_**. **Reproduction Steps:** 1. Set up -...

least_request LB strategy causes full TPS drop when upstream endpoint hang

@ejona86, Exactly. The combination of blocking calls + fixed concurrency + long rpc timeouts + 1/9 of the RPCs got assigned to the bad server lead to this issue.