Race in "docker logs --follow" leads to hang in TestLogsFollowSlowStdoutConsumer #16462
Description
The "TestLogsFollowSlowStdoutConsumer" test sometimes hangs on s390x.
Also on x86 systems we could reproduce the hang by changing the test
variables as follows:
- out, _ := dockerCmd(c, "run",...`usleep 200000;yes X | head -c 200000`)
+ out, _ := dockerCmd(c, "run",...`usleep 10000;yes X | head -c 10000`)
Version information:
$ docker info
Containers: 26
Images: 1
Storage Driver: overlay
Backing Filesystem: extfs
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 4.1.0-02210-gf72a620
Operating System: Red Hat Enterprise Linux Server 7.1 (Maipo)
CPUs: 2
Total Memory: 1.821 GiB
Name: s3545002
$ docker version
Client:
Version: 1.8.1
API version: 1.20
Go version: go1.4.2 gccgo (GCC) 5.2.0
Git commit: d12ea79-dirty
Built: Sun Aug 30 15:35:56 UTC 2015
OS/Arch: linux/s390x
Server:
Version: 1.8.1
API version: 1.20
Go version: go1.4.2 gccgo (GCC) 5.2.0
Git commit: d12ea79-dirty
Built: Sun Aug 30 15:35:56 UTC 2015
OS/Arch: linux/s390x
$ uname -a
Linux s3545002 4.1.0-02210-gf72a620 #1 SMP Wed Sep 16 18:45:15 CEST 2015 s390x s390x s390x GNU/Linux