Flaky test: AllMetricsOneFunction

[easwars]

--- FAIL: Test (0.15s)
    --- FAIL: Test/AllMetricsOneFunction (0.07s)
        tlogger.go:116: INFO server.go:629 [core] [Server #19] Server created  (t=+1.130319ms)
        tlogger.go:116: INFO clientconn.go:177 [core] [Channel #20] Channel created  (t=+1.558427ms)
        tlogger.go:116: INFO clientconn.go:1600 [core] [Channel #20] original dial target is: "whatever:///127.0.0.1:45395"  (t=+1.668828ms)
        tlogger.go:116: INFO clientconn.go:1607 [core] [Channel #20] parsed dial target is: {Scheme:whatever Authority: URL:{Scheme:whatever Opaque: User: Host: Path:/127.0.0.1:45395 RawPath: OmitHost:false ForceQuery:false RawQuery: Fragment: RawFragment:}}  (t=+1.824031ms)
        tlogger.go:116: INFO clientconn.go:1707 [core] [Channel #20] Channel authority set to "127.0.0.1:45395"  (t=+1.928833ms)
        tlogger.go:116: INFO resolver_conn_wrapper.go:196 [core] [Channel #20] Resolver state updated: {
              "Addresses": [
                {
                  "Addr": "127.0.0.1:45395",
                  "ServerName": "",
                  "Attributes": null,
                  "BalancerAttributes": null,
                  "Type": 0,
                  "Metadata": null
                }
              ],
              "ServiceConfig": null,
              "Attributes": null
            } (resolver returned new addresses)  (t=+2.188437ms)
        tlogger.go:116: INFO balancer_conn_wrappers.go:276 [core] [Channel #20] Channel switches to new LB policy "pick_first"  (t=+2.37184ms)
        tlogger.go:116: INFO clientconn.go:759 [core] [Channel #20 SubChannel #21] Subchannel created  (t=+2.5[336](https://github.com/grpc/grpc-go/actions/runs/4824796293/jobs/8595006405?pr=6228#step:8:337)43ms)
        tlogger.go:116: INFO clientconn.go:451 [core] [Channel #20] Channel Connectivity change to CONNECTING  (t=+2.629444ms)
        tlogger.go:116: INFO server.go:817 [core] [Server #19 ListenSocket #22] ListenSocket created  (t=+2.788947ms)
        tlogger.go:116: INFO clientconn.go:1141 [core] [Channel #20 SubChannel #21] Subchannel Connectivity change to CONNECTING  (t=+3.064652ms)
        tlogger.go:116: INFO clientconn.go:1255 [core] [Channel #20 SubChannel #21] Subchannel picks a new address "127.0.0.1:45395" to connect  (t=+3.254755ms)
        tlogger.go:116: INFO clientconn.go:1141 [core] [Channel #20 SubChannel #21] Subchannel Connectivity change to READY  (t=+4.581777ms)
        tlogger.go:116: INFO clientconn.go:451 [core] [Channel #20] Channel Connectivity change to READY  (t=+4.880182ms)
        e2e_test.go:1019: got unexpected viewInformation for metric grpc.io/server/completed_rpcs, diff (-got, +want):   (*opencensus.viewInformation)(
            - 	&{
            - 		aggType:    s"Count",
            - 		aggBuckets: []float64{},
            - 		desc:       "Number of completed RPCs by method and status.",
            - 		tagKeys:    []tag.Key{{name: "grpc_server_method"}, {name: "grpc_server_status"}},
            - 		rows:       []*view.Row{s"{ { {grpc_server_method grpc.testing.TestService/FullDuplexCall}"...},
            - 	},
            + 	&{
            + 		aggType:    s"Count",
            + 		aggBuckets: []float64{},
            + 		desc:       "Number of completed RPCs by method and status.",
            + 		tagKeys:    []tag.Key{{name: "grpc_server_method"}, {name: "grpc_server_status"}},
            + 		rows: []*view.Row{
            + 			s"{ { {grpc_server_method grpc.testing.TestService/UnaryCall}{grpc"...,
            + 			s"{ { {grpc_server_method grpc.testing.TestService/FullDuplexCall}"...,
            + 		},
            + 	},
              )
        tlogger.go:116: INFO clientconn.go:451 [core] [Channel #20] Channel Connectivity change to SHUTDOWN  (t=+55.584632ms)
        tlogger.go:116: INFO clientconn.go:1141 [core] [Channel #20 SubChannel #21] Subchannel Connectivity change to SHUTDOWN  (t=+55.955638ms)
        tlogger.go:116: INFO clientconn.go:1468 [core] [Channel #20 SubChannel #21] Subchannel deleted  (t=+56.110[341](https://github.com/grpc/grpc-go/actions/runs/4824796293/jobs/8595006405?pr=6228#step:8:342)ms)
        tlogger.go:116: INFO clientconn.go:1095 [core] [Channel #20] Channel deleted  (t=+56.201042ms)
        tlogger.go:116: INFO server.go:768 [core] [Server #19 ListenSocket #22] ListenSocket deleted  (t=+57.087057ms)
FAIL
FAIL	google.golang.org/grpc/stats/opencensus	0.831s

https://github.com/grpc/grpc-go/actions/runs/4824796293/jobs/8595006405?pr=6228

[zasweq]

https://github.com/grpc/grpc-go/actions/runs/4941366117/jobs/8834125335?pr=6268

[dfawley]

https://github.com/grpc/grpc-go/actions/runs/5094637292/jobs/9158695833?pr=6314#step:8:342

[zasweq]

https://github.com/zasweq/grpc-go/actions/runs/5225767251/jobs/9436000856

[zasweq]

Failed 18/10k times in Forge. This needs a sync point between server emitting this metric and the cmp.Diff call. Right now, it just waits on client receiving EOF, which server puts onto wire before metric recording with no sync point, thus not guaranteeing it works.