xDS fault injection e2e test: fix flakes caused by processing queued calls in parallel#32429
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markdroth merged 1 commit intogrpc:masterfrom Feb 17, 2023
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XuanWang-Amos
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May 1, 2023
…calls in parallel (grpc#32429) The `XdsFaultInjectionMaxFault` test has seen a few flakes since grpc#32326 was merged. I believe the flakiness is caused by the fact that when a large number of RPCs are queued up before the resolver result comes in, those RPCs are now re-processed in parallel instead of sequentially, which can cause us to delay more RPCs than we should due to the `max_faults` setting. To fix this, we change the test to ensure that the channel is connected (i.e., the resolver result has already been returned) before we start sending a large number of concurrent RPCs. Although this is the only test that I've seen flakes in, I've made this same change consistently to all fault injection tests that are creating a large number of concurrent RPCs, since the same flake could affect any of them.
wanlin31
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May 18, 2023
…calls in parallel (#32429) The `XdsFaultInjectionMaxFault` test has seen a few flakes since #32326 was merged. I believe the flakiness is caused by the fact that when a large number of RPCs are queued up before the resolver result comes in, those RPCs are now re-processed in parallel instead of sequentially, which can cause us to delay more RPCs than we should due to the `max_faults` setting. To fix this, we change the test to ensure that the channel is connected (i.e., the resolver result has already been returned) before we start sending a large number of concurrent RPCs. Although this is the only test that I've seen flakes in, I've made this same change consistently to all fault injection tests that are creating a large number of concurrent RPCs, since the same flake could affect any of them.
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XdsFaultInjectionMaxFaulttest has seen a few flakes since #32326 was merged. I believe the flakiness is caused by the fact that when a large number of RPCs are queued up before the resolver result comes in, those RPCs are now re-processed in parallel instead of sequentially, which can cause us to delay more RPCs than we should due to themax_faultssetting. To fix this, we change the test to ensure that the channel is connected (i.e., the resolver result has already been returned) before we start sending a large number of concurrent RPCs.Although this is the only test that I've seen flakes in, I've made this same change consistently to all fault injection tests that are creating a large number of concurrent RPCs, since the same flake could affect any of them.