functional-tester: stresser Cancel is hanging

[gyuho]

2016-08-18 19:40:55.090511 I | etcd-tester: stresser "10.240.0.19:2379" is started
2016-08-18 19:40:55.090704 I | etcd-tester: stresser "10.240.0.20:2379" is started
2016-08-18 19:40:55.090996 I | etcd-tester: stresser "10.240.0.22:2379" is started
2016-08-18 19:40:55.091798 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.20:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.20:2379" <nil>}
2016-08-18 19:40:55.091851 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.22:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.22:2379" <nil>}
2016-08-18 19:40:55.091884 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:40:55.091926 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:40:57.337018 W | etcd-tester: #0 setHealthKey error (etcdserver: not capable (http://10.240.0.19:2379))
2016-08-18 19:40:58.372445 I | etcd-tester: no failpoints found (Get http://10.240.0.19:2381: dial tcp 10.240.0.19:2381: getsockopt: connection refused)
2016-08-18 19:40:58.410892 I | etcd-tester: [round#0 case#0] injecting failure "kill all members"
2016-08-18 19:40:58.524686 I | etcd-tester: transport: http2Client.notifyError got notified that the client transport was broken read tcp 10.240.0.23:37073->10.240.0.19:2379: read: connection reset by peer.
2016-08-18 19:40:58.525198 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:40:58.641738 I | etcd-tester: transport: http2Client.notifyError got notified that the client transport was broken read tcp 10.240.0.23:59978->10.240.0.20:2379: read: connection reset by peer.
2016-08-18 19:40:58.642428 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.20:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.20:2379" <nil>}
2016-08-18 19:40:59.525520 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:40:59.642728 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.20:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.20:2379" <nil>}
2016-08-18 19:41:01.201692 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:41:01.480019 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.20:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.20:2379" <nil>}
2016-08-18 19:41:03.582114 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:41:03.642565 I | etcd-tester: transport: http2Client.notifyError got notified that the client transport was broken EOF.
2016-08-18 19:41:03.642853 I | etcd-tester: [round#0 case#0] injected failure
2016-08-18 19:41:03.642876 I | etcd-tester: [round#0 case#0] recovering failure "kill all members"
2016-08-18 19:41:03.643302 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.22:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.22:2379" <nil>}
2016-08-18 19:41:03.648355 I | etcd-tester: grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp 10.240.0.19:2379: getsockopt: connection refused"; Reconnecting to {"10.240.0.19:2379" <nil>}
2016-08-18 19:41:06.040063 I | etcd-tester: [round#0 case#0] recovered failure
2016-08-18 19:41:06.040100 I | etcd-tester: [round#0 case#0] canceling the stressers...
2016-08-18 19:41:06.040471 I | etcd-tester: grpc: addrConn.transportMonitor exits due to: context canceled                                                                                 

Counted canceled goroutine and only got 77 where we have 100 goroutines to cancel.
Some goroutines seem blocked. Investigating...