0.14 sometimes hangs before running any actions

[lberki]

Stack trace looks like this:

https://gist.github.com/mattklein123/070fbfe5c49d52b0457e9c694c148380

It appears that we unconditionally run docker info on every build, and if that hangs, we also hang. There is a fix at HEAD (4b80f24) but that doesn't help 0.14 by itself.

[mattklein123]

Hi,

I'm happy to help debug this further. Can you let me know what additional info I can provide? I suspect it's something like in certain cases the docker process is waiting to read from stdin or something like that?

[mattklein123]

klein@localhost:~$ docker version
Client:
 Version:      18.03.1-ce
 API version:  1.37
 Go version:   go1.9.5
 Git commit:   9ee9f40
 Built:        Thu Apr 26 07:17:20 2018
 OS/Arch:      linux/amd64
 Experimental: false
 Orchestrator: swarm

Server:
 Engine:
  Version:      18.03.1-ce
  API version:  1.37 (minimum version 1.12)
  Go version:   go1.9.5
  Git commit:   9ee9f40
  Built:        Thu Apr 26 07:15:30 2018
  OS/Arch:      linux/amd64
  Experimental: false
mklein@localhost:~$ docker info
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 6
Server Version: 18.03.1-ce
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 22
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host macvlan null overlay
 Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 773c489c9c1b21a6d78b5c538cd395416ec50f88
runc version: 4fc53a81fb7c994640722ac585fa9ca548971871
init version: 949e6fa
Security Options:
 apparmor
 seccomp
  Profile: default
Kernel Version: 4.4.0-127-generic
Operating System: Ubuntu 16.04.4 LTS
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 7.779GiB
Name: localhost
ID: XIOC:BKJF:YGML:WTCP:33T7:7JZO:M3BU:AEBA:GNX7:RLWA:4SML:MI4T
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Username: mattklein123
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

WARNING: No swap limit support

For reference.

[lfpino]

Assigning back to @lberki and @aehlig (Bazel sheriff) to further debug this if needed.

[hlopko]

Since the 0.14.1 release is out, can this be closed?