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Attempting to get distribution list via the api crashes the engine #271

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toochevere opened this issue Sep 9, 2021 · 0 comments
Open

Attempting to get distribution list via the api crashes the engine #271

toochevere opened this issue Sep 9, 2021 · 0 comments

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@toochevere
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Description

Balena-engine-daemon crashes when attempting to get a distribution list via the socket api.

Steps to reproduce the issue:

  1. Run sudo balena-engine-daemon in a bash console.
  2. Run sudo curl --unix-socket /var/run/balena-engine.sock http://localhost/version to verify communication with the daemon. It should succeed.
  3. Run sudo curl --unix-socket /var/run/balena-engine.sock http://localhost/v1.35/distribution/library/busybox/json. It fails with curl: (52) Empty reply from server

Describe the results you received:

sudo curl --unix-socket /var/run/balena-engine.sock http://localhost/v1.35/distribution/library/busybox/json. It fails with curl: (52) Empty reply from server. balena-engine-daemon meanwhile crashes with a stack dump. (see attached)

Describe the results you expected:

The curl command should return the same thing as Docker does with sudo curl --unix-socket /run/docker.sock http:/v1.35/distribution/library/busybox/json

Result from docker

{"Descriptor":{"mediaType":"application/vnd.docker.distribution.manifest.list.v2+json","digest":"sha256:b37dd066f59a4961024cf4bed74cae5e68ac26b48807292bd12198afa3ecb778","size":2295},"Platforms":[{"architecture":"amd64","os":"linux"},{"architecture":"arm","os":"linux","variant":"v5"},{"architecture":"arm","os":"linux","variant":"v6"},{"architecture":"arm","os":"linux","variant":"v7"},{"architecture":"arm64","os":"linux","variant":"v8"},{"architecture":"386","os":"linux"},{"architecture":"mips64le","os":"linux"},{"architecture":"ppc64le","os":"linux"},{"architecture":"riscv64","os":"linux"},{"architecture":"s390x","os":"linux"}]}

Additional information you deem important (e.g. issue happens only occasionally):

none

Output of balena-engine version:

Client:
 Version:	v17.12.0
 API version:	1.35
 Go version:	go1.10.4
 Git commit:	3fdfd0d
 Built:	Wed Oct 17 15:42:29 2018
 OS/Arch:	linux/amd64
 Experimental:	false
 Orchestrator:	swarm

Server:
 Engine:
  Version:	v17.12.0
  API version:	1.35 (minimum version 1.12)
  Go version:	go1.10.4
  Git commit:	3fdfd0d
  Built:	Wed Oct 17 15:42:29 2018
  OS/Arch:	linux/amd64
  Experimental:	false

Output of balena-engine info:

Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: v17.12.0
Storage Driver: btrfs
 Build Version: Btrfs v3.17
 Library Version: 101
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host null
 Log: journald json-file
Swarm: 
 NodeID: 
 Is Manager: false
 Node Address: 
Runtimes: bare runc
Default Runtime: runc
Init Binary: balena-engine-init
containerd version: 
runc version: 13e66eedaddfbfeda2a73d23701000e4e63b5471
init version: N/A (expected: )
Security Options:
 apparmor
Kernel Version: 5.12.14-051214-generic
Operating System: Ubuntu 20.04.3 LTS
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 39.03GiB
Name: balena
ID: YTYM:STR4:DAGK:WXSM:PUPO:VNVS:6FD7:6URW:VF4L:GPTW:YH6L:LEB5
Docker Root Dir: /var/lib/balena-engine
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled

Additional environment details (device type, OS, etc.):

Stack track from balena-engine-daemon

fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x63 pc=0x7f2ba40405ca]

runtime stack:
runtime.throw(0x174a29a, 0x2a)
	/usr/local/go/src/runtime/panic.go:616 +0x81
runtime.sigpanic()
	/usr/local/go/src/runtime/signal_unix.go:372 +0x28e

goroutine 214 [syscall]:
runtime.cgocall(0x12bb480, 0xc420ab05f8, 0x29)
	/usr/local/go/src/runtime/cgocall.go:128 +0x64 fp=0xc420ab05b8 sp=0xc420ab0580 pc=0x4035e4
net._C2func_getaddrinfo(0xc420dd14a0, 0x0, 0xc420912870, 0xc4202081e0, 0x0, 0x0, 0x0)
	_cgo_gotypes.go:92 +0x55 fp=0xc420ab05f8 sp=0xc420ab05b8 pc=0x57fd15
net.cgoLookupIPCNAME.func1(0xc420dd14a0, 0x0, 0xc420912870, 0xc4202081e0, 0xf, 0xf, 0xc420534000)
	/usr/local/go/src/net/cgo_unix.go:149 +0x13b fp=0xc420ab0640 sp=0xc420ab05f8 pc=0x586a7b
net.cgoLookupIPCNAME(0xc421367200, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/cgo_unix.go:149 +0x174 fp=0xc420ab0738 sp=0xc420ab0640 pc=0x581384
net.cgoIPLookup(0xc42096d200, 0xc421367200, 0xe)
	/usr/local/go/src/net/cgo_unix.go:201 +0x4d fp=0xc420ab07c8 sp=0xc420ab0738 pc=0x581a4d
runtime.goexit()
	/usr/local/go/src/runtime/asm_amd64.s:2361 +0x1 fp=0xc420ab07d0 sp=0xc420ab07c8 pc=0x45cc01
created by net.cgoLookupIP
	/usr/local/go/src/net/cgo_unix.go:211 +0xaf

goroutine 1 [chan receive]:
github.com/docker/docker/cmd/dockerd.(*DaemonCli).start(0xc42045c780, 0xc420246000, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/daemon.go:270 +0x1605
github.com/docker/docker/cmd/dockerd.runDaemon(0xc420246000, 0xc4202361e0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/docker.go:78 +0x68
github.com/docker/docker/cmd/dockerd.newDaemonCommand.func1(0xc42042c000, 0x232e208, 0x0, 0x0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/docker.go:29 +0x5b
github.com/docker/docker/vendor/github.com/spf13/cobra.(*Command).execute(0xc42042c000, 0xc42003a1b0, 0x0, 0x0, 0xc42042c000, 0xc42003a1b0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/spf13/cobra/command.go:700 +0x46d
github.com/docker/docker/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc42042c000, 0xc4202361e0, 0xc420280000, 0xc42042c000)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/spf13/cobra/command.go:785 +0x2e4
github.com/docker/docker/vendor/github.com/spf13/cobra.(*Command).Execute(0xc42042c000, 0xc42000e020, 0x15de301)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/spf13/cobra/command.go:738 +0x2b
github.com/docker/docker/cmd/dockerd.Main()
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/docker.go:106 +0xa0
main.main()
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/balena-engine/main.go:29 +0xf9

goroutine 22 [syscall]:
os/signal.signal_recv(0x4353c8)
	/usr/local/go/src/runtime/sigqueue.go:139 +0xa6
os/signal.loop()
	/usr/local/go/src/os/signal/signal_unix.go:22 +0x22
created by os/signal.init.0
	/usr/local/go/src/os/signal/signal_unix.go:28 +0x41

goroutine 53 [syscall]:
syscall.Syscall6(0xf7, 0x1, 0xeac02, 0xc4204afdc8, 0x1000004, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/syscall/asm_linux_amd64.s:44 +0x5
os.(*Process).blockUntilWaitable(0xc420308270, 0x0, 0x0, 0x0)
	/usr/local/go/src/os/wait_waitid.go:31 +0x98
os.(*Process).wait(0xc420308270, 0x0, 0x0, 0x0)
	/usr/local/go/src/os/exec_unix.go:22 +0x3c
os.(*Process).Wait(0xc420308270, 0x0, 0x0, 0x0)
	/usr/local/go/src/os/exec.go:123 +0x2b
os/exec.(*Cmd).Wait(0xc4200f0160, 0x0, 0x0)
	/usr/local/go/src/os/exec/exec.go:461 +0x5c
github.com/docker/docker/libcontainerd.(*remote).startContainerd.func1(0xc4200f0160, 0xc42021c340)
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/remote_daemon.go:243 +0x2f
created by github.com/docker/docker/libcontainerd.(*remote).startContainerd
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/remote_daemon.go:241 +0x3d9

goroutine 16 [chan receive]:
github.com/docker/docker/libcontainerd.(*remote).monitorConnection(0xc42021c340, 0xc420532c40)
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/remote_daemon.go:270 +0x9c
created by github.com/docker/docker/libcontainerd.New
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/remote_daemon.go:116 +0x58c

goroutine 27 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f9d60, 0x72, 0xc42007bb88)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc420542898, 0x72, 0xffffffffffffff00, 0x18621c0, 0x22afee8)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc420542898, 0xc420088000, 0x8000, 0x8000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc420542880, 0xc420088000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:157 +0x17d
net.(*netFD).Read(0xc420542880, 0xc420088000, 0x8000, 0x8000, 0x10, 0xc42003bd50, 0x0)
	/usr/local/go/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc4205300d0, 0xc420088000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:176 +0x6a
bufio.(*Reader).Read(0xc42052c8a0, 0xc4200ee038, 0x9, 0x9, 0xc42007bd38, 0xc42007bd98, 0x881bb6)
	/usr/local/go/src/bufio/bufio.go:216 +0x238
io.ReadAtLeast(0x185c500, 0xc42052c8a0, 0xc4200ee038, 0x9, 0x9, 0x9, 0xc42007bdd8, 0x20, 0xc4200a5200)
	/usr/local/go/src/io/io.go:309 +0x86
io.ReadFull(0x185c500, 0xc42052c8a0, 0xc4200ee038, 0x9, 0x9, 0xc42007be19, 0xc4208c2cf0, 0xc42035c7e0)
	/usr/local/go/src/io/io.go:327 +0x58
github.com/docker/docker/vendor/golang.org/x/net/http2.readFrameHeader(0xc4200ee038, 0x9, 0x9, 0x185c500, 0xc42052c8a0, 0x0, 0x0, 0xc4208c2cc0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/golang.org/x/net/http2/frame.go:237 +0x7b
github.com/docker/docker/vendor/golang.org/x/net/http2.(*Framer).ReadFrame(0xc4200ee000, 0xc, 0x0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/golang.org/x/net/http2/frame.go:492 +0xa4
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*framer).readFrame(0xc420516db0, 0xc4208c2cf0, 0xc4208c2cf0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http_util.go:544 +0x2f
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*http2Client).reader(0xc420502600)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:1057 +0xc0
created by github.com/docker/docker/vendor/google.golang.org/grpc/transport.newHTTP2Client
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:250 +0xb21

goroutine 28 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*http2Client).controller(0xc420502600)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:1130 +0x122
created by github.com/docker/docker/vendor/google.golang.org/grpc/transport.newHTTP2Client
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:280 +0xea2

goroutine 29 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc.(*addrConn).transportMonitor(0xc42021c820)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/clientconn.go:891 +0x1c0
created by github.com/docker/docker/vendor/google.golang.org/grpc.(*ClientConn).resetAddrConn
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/clientconn.go:608 +0x68b

goroutine 66 [select, locked to thread]:
runtime.gopark(0x178f390, 0x0, 0x17065e3, 0x6, 0x18, 0x1)
	/usr/local/go/src/runtime/proc.go:291 +0x11a
runtime.selectgo(0xc4202dff50, 0xc4200b03c0)
	/usr/local/go/src/runtime/select.go:392 +0xe50
runtime.ensureSigM.func1()
	/usr/local/go/src/runtime/signal_unix.go:549 +0x1f4
runtime.goexit()
	/usr/local/go/src/runtime/asm_amd64.s:2361 +0x1

goroutine 31 [chan receive]:
github.com/docker/docker/pkg/signal.Trap.func1(0xc420382300, 0x185e500, 0xc4200c0140, 0xc42032ae20)
	/balena-engine/.gopath/src/github.com/docker/docker/pkg/signal/trap.go:38 +0x5b
created by github.com/docker/docker/pkg/signal.Trap
	/balena-engine/.gopath/src/github.com/docker/docker/pkg/signal/trap.go:36 +0x11e

goroutine 57 [chan receive]:
github.com/docker/docker/daemon.(*Daemon).setupDumpStackTrap.func1(0xc42052cb40, 0x171f363, 0x16)
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/debugtrap_unix.go:18 +0x44
created by github.com/docker/docker/daemon.(*Daemon).setupDumpStackTrap
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/debugtrap_unix.go:17 +0xbf

goroutine 62 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f9c90, 0x72, 0x0)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc4200f8798, 0x72, 0xc420534b00, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc4200f8798, 0xffffffffffffff00, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc4200f8780, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:372 +0x1a8
net.(*netFD).accept(0xc4200f8780, 0xc42044fe58, 0x412f08, 0x30)
	/usr/local/go/src/net/fd_unix.go:238 +0x42
net.(*UnixListener).accept(0xc42051a570, 0x532b5a, 0x1628600, 0xc420517470)
	/usr/local/go/src/net/unixsock_posix.go:162 +0x32
net.(*UnixListener).Accept(0xc42051a570, 0xc420042088, 0x14d3660, 0x227c1a0, 0x16da7a0)
	/usr/local/go/src/net/unixsock.go:253 +0x49
net/http.(*Server).Serve(0xc4204821a0, 0x1873f20, 0xc42051a570, 0x0, 0x0)
	/usr/local/go/src/net/http/server.go:2773 +0x1a5
net/http.Serve(0x1873f20, 0xc42051a570, 0x185eee0, 0xc42051a5a0, 0x4353c8, 0x178f220)
	/usr/local/go/src/net/http/server.go:2392 +0x73
github.com/docker/docker/daemon.(*Daemon).listenMetricsSock.func1(0x1873f20, 0xc42051a570, 0xc42051a5a0)
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/metrics_unix.go:31 +0x4b
created by github.com/docker/docker/daemon.(*Daemon).listenMetricsSock
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/metrics_unix.go:30 +0x193

goroutine 84 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*recvBufferReader).Read(0xc420048f40, 0xc42032af30, 0x5, 0x5, 0x0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/transport.go:144 +0x2ba
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*Stream).Read(0xc4201a0240, 0xc42032af30, 0x5, 0x5, 0xc42030d9e8, 0x88143c, 0xc42030d9e8)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/transport.go:332 +0x5c
io.ReadAtLeast(0x185e9e0, 0xc4201a0240, 0xc42032af30, 0x5, 0x5, 0x5, 0x0, 0x0, 0x0)
	/usr/local/go/src/io/io.go:309 +0x86
io.ReadFull(0x185e9e0, 0xc4201a0240, 0xc42032af30, 0x5, 0x5, 0x10000c42022bbc0, 0xc4205185b0, 0x0)
	/usr/local/go/src/io/io.go:327 +0x58
github.com/docker/docker/vendor/google.golang.org/grpc.(*parser).recvMsg(0xc42032af20, 0x7fffffff, 0x10000000000002e, 0x3, 0xc42004a070, 0xc42004a000, 0xc420489218, 0xc420489220)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/rpc_util.go:218 +0x69
github.com/docker/docker/vendor/google.golang.org/grpc.recv(0xc42032af20, 0x1875560, 0x232e208, 0xc4201a0240, 0x0, 0x0, 0x1626060, 0xc420048f80, 0x7fffffff, 0x0, ...)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/rpc_util.go:314 +0x4d
github.com/docker/docker/vendor/google.golang.org/grpc.(*clientStream).RecvMsg(0xc420238f20, 0x1626060, 0xc420048f80, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/stream.go:376 +0xcd
github.com/docker/docker/vendor/github.com/containerd/containerd/api/services/events/v1.(*eventsSubscribeClient).Recv(0xc42003bbd0, 0x7f2ba4081140, 0xc420489240, 0xc42032ae60)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/containerd/containerd/api/services/events/v1/events.pb.go:213 +0x62
github.com/docker/docker/libcontainerd.(*client).processEventStream(0xc420246460, 0x18760a0, 0xc420489240)
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/client_daemon.go:728 +0x393
created by github.com/docker/docker/libcontainerd.(*remote).NewClient
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/remote_daemon.go:136 +0x249

goroutine 65 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f9bc0, 0x72, 0xc420253b88)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc4200f8a98, 0x72, 0xffffffffffffff00, 0x18621c0, 0x22afee8)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc4200f8a98, 0xc4203d6000, 0x8000, 0x8000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc4200f8a80, 0xc4203d6000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:157 +0x17d
net.(*netFD).Read(0xc4200f8a80, 0xc4203d6000, 0x8000, 0x8000, 0x9, 0x0, 0x0)
	/usr/local/go/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc42000e198, 0xc4203d6000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:176 +0x6a
bufio.(*Reader).Read(0xc420226f00, 0xc4203e6038, 0x9, 0x9, 0x30, 0x28, 0x160a8e0)
	/usr/local/go/src/bufio/bufio.go:216 +0x238
io.ReadAtLeast(0x185c500, 0xc420226f00, 0xc4203e6038, 0x9, 0x9, 0x9, 0xc420253dc0, 0x40219e, 0xc420253e6f)
	/usr/local/go/src/io/io.go:309 +0x86
io.ReadFull(0x185c500, 0xc420226f00, 0xc4203e6038, 0x9, 0x9, 0x84c534, 0xc4205174d0, 0xc420510004)
	/usr/local/go/src/io/io.go:327 +0x58
github.com/docker/docker/vendor/golang.org/x/net/http2.readFrameHeader(0xc4203e6038, 0x9, 0x9, 0x185c500, 0xc420226f00, 0x0, 0x0, 0xc4205174d0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/golang.org/x/net/http2/frame.go:237 +0x7b
github.com/docker/docker/vendor/golang.org/x/net/http2.(*Framer).ReadFrame(0xc4203e6000, 0x1866560, 0xc4205174d0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/golang.org/x/net/http2/frame.go:492 +0xa4
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*framer).readFrame(0xc420498720, 0xc4205174d0, 0xc4205174d0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http_util.go:544 +0x2f
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*http2Client).reader(0xc4200a5800)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:1057 +0xc0
created by github.com/docker/docker/vendor/google.golang.org/grpc/transport.newHTTP2Client
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:250 +0xb21

goroutine 82 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*http2Client).controller(0xc4200a5800)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:1130 +0x122
created by github.com/docker/docker/vendor/google.golang.org/grpc/transport.newHTTP2Client
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:280 +0xea2

goroutine 83 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc.(*addrConn).transportMonitor(0xc42021cd00)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/clientconn.go:891 +0x1c0
created by github.com/docker/docker/vendor/google.golang.org/grpc.(*ClientConn).resetAddrConn
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/clientconn.go:608 +0x68b

goroutine 68 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc.newClientStream.func3(0x1883de0, 0xc4200a5800, 0xc42021cb60, 0xc420238f20, 0xc4201a0240)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/stream.go:241 +0x19b
created by github.com/docker/docker/vendor/google.golang.org/grpc.newClientStream
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/stream.go:240 +0xb8a

goroutine 85 [chan receive]:
github.com/docker/docker/daemon/stats.(*Collector).Run(0xc420380200)
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/stats/collector.go:60 +0x1ce
created by github.com/docker/docker/daemon.(*Daemon).newStatsCollector
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/stats_collector.go:24 +0x7f

goroutine 86 [chan receive]:
github.com/docker/docker/daemon.(*Daemon).execCommandGC(0xc42047a000)
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/exec.go:281 +0x14e
created by github.com/docker/docker/daemon.NewDaemon
	/balena-engine/.gopath/src/github.com/docker/docker/daemon/daemon.go:935 +0x2637

goroutine 92 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*recvBufferReader).Read(0xc420534d40, 0xc420532eb0, 0x5, 0x5, 0x0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/transport.go:144 +0x2ba
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*Stream).Read(0xc42003c5a0, 0xc420532eb0, 0x5, 0x5, 0xc4203119e8, 0x88143c, 0xc4203119e8)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/transport.go:332 +0x5c
io.ReadAtLeast(0x185e9e0, 0xc42003c5a0, 0xc420532eb0, 0x5, 0x5, 0x5, 0x0, 0x0, 0x0)
	/usr/local/go/src/io/io.go:309 +0x86
io.ReadFull(0x185e9e0, 0xc42003c5a0, 0xc420532eb0, 0x5, 0x5, 0x10000c42052a1e0, 0xc4200bcea0, 0x0)
	/usr/local/go/src/io/io.go:327 +0x58
github.com/docker/docker/vendor/google.golang.org/grpc.(*parser).recvMsg(0xc420532ea0, 0x7fffffff, 0x100000000000026, 0x3, 0xc42004c570, 0xc42004c500, 0xc420534cd8, 0xc420534ce0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/rpc_util.go:218 +0x69
github.com/docker/docker/vendor/google.golang.org/grpc.recv(0xc420532ea0, 0x1875560, 0x232e208, 0xc42003c5a0, 0x0, 0x0, 0x1626060, 0xc420534dc0, 0x7fffffff, 0x0, ...)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/rpc_util.go:314 +0x4d
github.com/docker/docker/vendor/google.golang.org/grpc.(*clientStream).RecvMsg(0xc4203a6580, 0x1626060, 0xc420534dc0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/stream.go:376 +0xcd
github.com/docker/docker/vendor/github.com/containerd/containerd/api/services/events/v1.(*eventsSubscribeClient).Recv(0xc42051f1b0, 0x7f2ba4081140, 0xc420489240, 0xc420532e00)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/containerd/containerd/api/services/events/v1/events.pb.go:213 +0x62
github.com/docker/docker/libcontainerd.(*client).processEventStream(0xc420246a10, 0x18760a0, 0xc420489240)
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/client_daemon.go:728 +0x393
created by github.com/docker/docker/libcontainerd.(*remote).NewClient
	/balena-engine/.gopath/src/github.com/docker/docker/libcontainerd/remote_daemon.go:136 +0x249

goroutine 89 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f9af0, 0x72, 0xc420448b88)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc4200f9018, 0x72, 0xffffffffffffff00, 0x18621c0, 0x22afee8)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc4200f9018, 0xc420336000, 0x8000, 0x8000)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc4200f9000, 0xc420336000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:157 +0x17d
net.(*netFD).Read(0xc4200f9000, 0xc420336000, 0x8000, 0x8000, 0xc420448cf0, 0x405b67, 0xc420333920)
	/usr/local/go/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc42000e290, 0xc420336000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:176 +0x6a
bufio.(*Reader).Read(0xc420227500, 0xc4203e6498, 0x9, 0x9, 0xc420448d38, 0xc420448d98, 0x881c7e)
	/usr/local/go/src/bufio/bufio.go:216 +0x238
io.ReadAtLeast(0x185c500, 0xc420227500, 0xc4203e6498, 0x9, 0x9, 0x9, 0xc420448dd8, 0x20, 0xc4204ac600)
	/usr/local/go/src/io/io.go:309 +0x86
io.ReadFull(0x185c500, 0xc420227500, 0xc4203e6498, 0x9, 0x9, 0xc420448e19, 0xc4208dbf50, 0xc42095c240)
	/usr/local/go/src/io/io.go:327 +0x58
github.com/docker/docker/vendor/golang.org/x/net/http2.readFrameHeader(0xc4203e6498, 0x9, 0x9, 0x185c500, 0xc420227500, 0x0, 0x0, 0xc4208dbf20, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/golang.org/x/net/http2/frame.go:237 +0x7b
github.com/docker/docker/vendor/golang.org/x/net/http2.(*Framer).ReadFrame(0xc4203e6460, 0xc, 0x0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/golang.org/x/net/http2/frame.go:492 +0xa4
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*framer).readFrame(0xc420377170, 0xc4208dbf50, 0xc4208dbf50, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http_util.go:544 +0x2f
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*http2Client).reader(0xc4204ac780)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:1057 +0xc0
created by github.com/docker/docker/vendor/google.golang.org/grpc/transport.newHTTP2Client
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:250 +0xb21

goroutine 90 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc/transport.(*http2Client).controller(0xc4204ac780)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:1130 +0x122
created by github.com/docker/docker/vendor/google.golang.org/grpc/transport.newHTTP2Client
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/transport/http2_client.go:280 +0xea2

goroutine 91 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc.(*addrConn).transportMonitor(0xc42021d040)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/clientconn.go:891 +0x1c0
created by github.com/docker/docker/vendor/google.golang.org/grpc.(*ClientConn).resetAddrConn
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/clientconn.go:608 +0x68b

goroutine 33 [select]:
github.com/docker/docker/vendor/google.golang.org/grpc.newClientStream.func3(0x1883de0, 0xc4204ac780, 0xc42021cea0, 0xc4203a6580, 0xc42003c5a0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/stream.go:241 +0x19b
created by github.com/docker/docker/vendor/google.golang.org/grpc.newClientStream
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/google.golang.org/grpc/stream.go:240 +0xb8a

goroutine 93 [select]:
github.com/docker/docker/vendor/github.com/docker/libnetwork.(*controller).watchLoop(0xc4201bcd00)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/libnetwork/store.go:446 +0xf9
created by github.com/docker/docker/vendor/github.com/docker/libnetwork.(*controller).startWatch
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/libnetwork/store.go:463 +0xe3

goroutine 100 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f97b0, 0x72, 0xc420289dc0)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc420234298, 0x72, 0xffffffffffffff00, 0x18621c0, 0x22afee8)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc420234298, 0xc420377300, 0x1, 0x1)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc420234280, 0xc420377361, 0x1, 0x1, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:157 +0x17d
net.(*netFD).Read(0xc420234280, 0xc420377361, 0x1, 0x1, 0x4139ec, 0xc4201f4c90, 0xc420289fb0)
	/usr/local/go/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc420530000, 0xc420377361, 0x1, 0x1, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/net.go:176 +0x6a
github.com/docker/docker/cmd/dockerd/hack.(*MalformedHostHeaderOverrideConn).Read(0xc42000c180, 0xc420377361, 0x1, 0x1, 0x544629, 0xc4202276e0, 0xc420289fb0)
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/hack/malformed_host_override.go:110 +0x84
net/http.(*connReader).backgroundRead(0xc420377350)
	/usr/local/go/src/net/http/server.go:668 +0x5a
created by net/http.(*connReader).startBackgroundRead
	/usr/local/go/src/net/http/server.go:664 +0xce

goroutine 71 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f9a20, 0x72, 0x0)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc4200f8018, 0x72, 0xc420380500, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc4200f8018, 0xffffffffffffff00, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc4200f8000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:372 +0x1a8
net.(*netFD).accept(0xc4200f8000, 0x14d4980, 0xc420016f58, 0x405b0b)
	/usr/local/go/src/net/fd_unix.go:238 +0x42
net.(*UnixListener).accept(0xc420881980, 0x0, 0xc420016f30, 0x0)
	/usr/local/go/src/net/unixsock_posix.go:162 +0x32
net.(*UnixListener).Accept(0xc420881980, 0xc420227e58, 0x0, 0x0, 0xc420016f90)
	/usr/local/go/src/net/unixsock.go:253 +0x49
github.com/docker/docker/vendor/github.com/docker/libnetwork.(*controller).acceptClientConnections(0xc4201bcd00, 0xc420210780, 0x5c, 0x1873f20, 0xc420881980)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/libnetwork/sandbox_externalkey_unix.go:127 +0x3b
created by github.com/docker/docker/vendor/github.com/docker/libnetwork.(*controller).startExternalKeyListener
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/libnetwork/sandbox_externalkey_unix.go:121 +0x1e4

goroutine 99 [select]:
net/http.(*Transport).getConn(0xc4202365a0, 0xc420912720, 0x0, 0xc4213671e0, 0x5, 0xc421367200, 0x12, 0x0, 0x0, 0x150)
	/usr/local/go/src/net/http/transport.go:962 +0x558
net/http.(*Transport).RoundTrip(0xc4202365a0, 0xc4201bd700, 0xc4201bd700, 0x0, 0xc420d3e240)
	/usr/local/go/src/net/http/transport.go:409 +0x632
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/transport.(*transport).RoundTrip(0xc42020e300, 0xc4201bd600, 0xc42020e300, 0xc04671d4276e63ce, 0x778a56b5f)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/transport/transport.go:62 +0x11a
net/http.send(0xc4201bd500, 0x185da80, 0xc42020e300, 0xc04671d4276e63ce, 0x778a56b5f, 0x23096c0, 0xc4202081c8, 0xc04671d4276e63ce, 0xc4213c8500, 0x1)
	/usr/local/go/src/net/http/client.go:252 +0x185
net/http.(*Client).send(0xc420912600, 0xc4201bd500, 0xc04671d4276e63ce, 0x778a56b5f, 0x23096c0, 0xc4202081c8, 0x0, 0x1, 0xc4200d8910)
	/usr/local/go/src/net/http/client.go:176 +0xfa
net/http.(*Client).Do(0xc420912600, 0xc4201bd500, 0x46, 0x0, 0x0)
	/usr/local/go/src/net/http/client.go:615 +0x28d
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth.(*tokenHandler).fetchTokenWithBasicAuth(0xc4209f0b40, 0xc420542800, 0xc420221c9f, 0x12, 0xc420e14780, 0x1, 0x1, 0x0, 0x0, 0x0, ...)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth/session.go:406 +0x385
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth.(*tokenHandler).fetchToken(0xc4209f0b40, 0xc420971500, 0xc420e14780, 0x1, 0x1, 0x0, 0x16a2301, 0x1, 0xc420912540, 0xc4213c8908, ...)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth/session.go:477 +0x2ca
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth.(*tokenHandler).getToken(0xc4209f0b40, 0xc420971500, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth/session.go:273 +0x403
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth.(*tokenHandler).AuthorizeRequest(0xc4209f0b40, 0xc4201bd400, 0xc420971500, 0x1, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth/session.go:248 +0x92
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth.(*endpointAuthorizer).ModifyRequest(0xc4205340c0, 0xc4201bd400, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/auth/session.go:102 +0x2af
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/transport.(*transport).RoundTrip(0xc420534100, 0xc4201bd300, 0xc420534100, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/transport/transport.go:56 +0x9d
net/http.send(0xc4201bd300, 0x185da80, 0xc420534100, 0x0, 0x0, 0x0, 0xc4202081a8, 0x150, 0xc4213c8e18, 0x1)
	/usr/local/go/src/net/http/client.go:252 +0x185
net/http.(*Client).send(0xc420912270, 0xc4201bd300, 0x0, 0x0, 0x0, 0xc4202081a8, 0x0, 0x1, 0x7f2ba63571e8)
	/usr/local/go/src/net/http/client.go:176 +0xfa
net/http.(*Client).Do(0xc420912270, 0xc4201bd300, 0x6, 0x175ce0f, 0x34)
	/usr/local/go/src/net/http/client.go:615 +0x28d
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client.(*tags).Get.func1(0x1702cfa, 0x4, 0xc42089f140, 0xc42026ed00, 0x40)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/repository.go:313 +0x10f
github.com/docker/docker/vendor/github.com/docker/distribution/registry/client.(*tags).Get(0xc4209123f0, 0x7f2b9c4a2000, 0xc4208da060, 0x1706019, 0x6, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/docker/distribution/registry/client/repository.go:317 +0x19d
github.com/docker/docker/api/server/router/distribution.(*distributionRouter).getDistributionInfo(0xc42096b380, 0x7f2ba42bd570, 0xc4208da060, 0x18741a0, 0xc4203e61c0, 0xc4201bc200, 0xc420029aa0, 0x170448d, 0x5)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/router/distribution/distribution_routes.go:72 +0xeb6
github.com/docker/docker/api/server/router/distribution.(*distributionRouter).(github.com/docker/docker/api/server/router/distribution.getDistributionInfo)-fm(0x7f2ba42bd570, 0xc4208da060, 0x18741a0, 0xc4203e61c0, 0xc4201bc200, 0xc420029aa0, 0x7f2ba42bd570, 0xc4208da060)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/router/distribution/distribution.go:29 +0x69
github.com/docker/docker/api/server/middleware.ExperimentalMiddleware.WrapHandler.func1(0x7f2ba42bd570, 0xc4208da060, 0x18741a0, 0xc4203e61c0, 0xc4201bc200, 0xc420029aa0, 0x7f2ba42bd570, 0xc4208da060)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/middleware/experimental.go:27 +0xd8
github.com/docker/docker/api/server/middleware.VersionMiddleware.WrapHandler.func1(0x7f2ba42bd570, 0xc4208da030, 0x18741a0, 0xc4203e61c0, 0xc4201bc200, 0xc420029aa0, 0x7f2ba6356b20, 0xc42007aa50)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/middleware/version.go:62 +0x3ff
github.com/docker/docker/pkg/authorization.(*Middleware).WrapHandler.func1(0x7f2ba42bd570, 0xc4208da030, 0x18741a0, 0xc4203e61c0, 0xc4201bc200, 0xc420029aa0, 0x7f2ba42bd570, 0xc4208da030)
	/balena-engine/.gopath/src/github.com/docker/docker/pkg/authorization/middleware.go:59 +0x7a9
github.com/docker/docker/api/server.(*Server).makeHTTPHandler.func1(0x18741a0, 0xc4203e61c0, 0xc4201bc200)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/server.go:137 +0x1c6
net/http.HandlerFunc.ServeHTTP(0xc420a24ea0, 0x18741a0, 0xc4203e61c0, 0xc4201bc200)
	/usr/local/go/src/net/http/server.go:1947 +0x44
github.com/docker/docker/vendor/github.com/gorilla/mux.(*Router).ServeHTTP(0xc420536f50, 0x18741a0, 0xc4203e61c0, 0xc4201bc200)
	/balena-engine/.gopath/src/github.com/docker/docker/vendor/github.com/gorilla/mux/mux.go:103 +0x226
github.com/docker/docker/api/server.(*routerSwapper).ServeHTTP(0xc420a5ce50, 0x18741a0, 0xc4203e61c0, 0xc4201bc200)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/router_swapper.go:29 +0x70
net/http.serverHandler.ServeHTTP(0xc42051d110, 0x18741a0, 0xc4203e61c0, 0xc4201bc200)
	/usr/local/go/src/net/http/server.go:2697 +0xbc
net/http.(*conn).serve(0xc4200e00a0, 0x18760a0, 0xc42020e080)
	/usr/local/go/src/net/http/server.go:1830 +0x651
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2798 +0x27b

goroutine 184 [chan receive]:
github.com/docker/docker/cmd/dockerd.(*DaemonCli).setupConfigReloadTrap.func1(0xc420a880c0, 0xc42045c780)
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/daemon_unix.go:66 +0x55
created by github.com/docker/docker/cmd/dockerd.(*DaemonCli).setupConfigReloadTrap
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/daemon_unix.go:65 +0xb5

goroutine 185 [chan receive]:
github.com/docker/docker/api/server.(*Server).serveAPI(0xc4202261e0, 0x0, 0x0)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/server.go:94 +0x131
github.com/docker/docker/api/server.(*Server).Wait(0xc4202261e0, 0xc4200b1560)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/server.go:199 +0x2f
created by github.com/docker/docker/cmd/dockerd.(*DaemonCli).start
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/daemon.go:263 +0x15d7

goroutine 187 [IO wait]:
internal/poll.runtime_pollWait(0x7f2ba42f9e30, 0x72, 0x0)
	/usr/local/go/src/runtime/netpoll.go:173 +0x57
internal/poll.(*pollDesc).wait(0xc4200f8098, 0x72, 0xc42020e100, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9b
internal/poll.(*pollDesc).waitRead(0xc4200f8098, 0xffffffffffffff00, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc4200f8080, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/internal/poll/fd_unix.go:372 +0x1a8
net.(*netFD).accept(0xc4200f8080, 0xc420251e08, 0xc420251e08, 0x40317c)
	/usr/local/go/src/net/fd_unix.go:238 +0x42
net.(*UnixListener).accept(0xc42045cb10, 0x14c1120, 0x14c1120, 0xc420251e38)
	/usr/local/go/src/net/unixsock_posix.go:162 +0x32
net.(*UnixListener).Accept(0xc42045cb10, 0xc420251e40, 0x4592a0, 0xc420251e80, 0xc420251e88)
	/usr/local/go/src/net/unixsock.go:253 +0x49
github.com/docker/docker/cmd/dockerd/hack.(*MalformedHostHeaderOverride).Accept(0xc4202e64f0, 0x178ecc0, 0xc4200e00a0, 0x1876160, 0xc420a842a0)
	/balena-engine/.gopath/src/github.com/docker/docker/cmd/dockerd/hack/malformed_host_override.go:116 +0x37
net/http.(*Server).Serve(0xc42051d110, 0x186d9e0, 0xc4202e64f0, 0x0, 0x0)
	/usr/local/go/src/net/http/server.go:2773 +0x1a5
github.com/docker/docker/api/server.(*HTTPServer).Serve(0xc42020a360, 0x10, 0xc420906fb0)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/server.go:112 +0x40
github.com/docker/docker/api/server.(*Server).serveAPI.func1(0xc420a88120, 0xc42020a360)
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/server.go:86 +0xa0
created by github.com/docker/docker/api/server.(*Server).serveAPI
	/balena-engine/.gopath/src/github.com/docker/docker/api/server/server.go:83 +0x86

goroutine 211 [select]:
net/http.setRequestCancel.func3(0x0, 0xc4209126c0, 0xc4213685a0, 0xc420dd148c, 0xc420d3e240)
	/usr/local/go/src/net/http/client.go:323 +0xfa
created by net/http.setRequestCancel
	/usr/local/go/src/net/http/client.go:322 +0x2ac

goroutine 212 [select]:
net.(*Resolver).LookupIPAddr(0x2307a00, 0x1876120, 0xc42096cfc0, 0xc421367200, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/lookup.go:212 +0x50d
net.(*Resolver).internetAddrList(0x2307a00, 0x1876120, 0xc42096cfc0, 0x170294f, 0x3, 0xc421367200, 0x12, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/net/ipsock.go:293 +0x5c4
net.(*Resolver).resolveAddrList(0x2307a00, 0x1876120, 0xc42096cfc0, 0x1703156, 0x4, 0x170294f, 0x3, 0xc421367200, 0x12, 0x0, ...)
	/usr/local/go/src/net/dial.go:193 +0x50c
net.(*Dialer).DialContext(0xc420098420, 0x18760e0, 0xc420042088, 0x170294f, 0x3, 0xc421367200, 0x12, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/net/dial.go:375 +0x22b
net.(*Dialer).Dial(0xc420098420, 0x170294f, 0x3, 0xc421367200, 0x12, 0x60, 0x110, 0x110, 0xc42091a360)
	/usr/local/go/src/net/dial.go:320 +0x75
github.com/docker/docker/vendor/golang.org/x/net/proxy.(Dialer).Dial-fm(0x170294f, 0x3, 0xc421367200, 0x12, 0xc42096cf60, 0xc42024cae8, 0x405456, 0x79b0e9)
	/balena-engine/.gopath/src/github.com/docker/docker/registry/registry.go:188 +0x5b
net/http.(*Transport).dial(0xc4202365a0, 0x18760e0, 0xc420042088, 0x170294f, 0x3, 0xc421367200, 0x12, 0x0, 0x0, 0x0, ...)
	/usr/local/go/src/net/http/transport.go:901 +0x78
net/http.(*Transport).dialConn(0xc4202365a0, 0x18760e0, 0xc420042088, 0x0, 0xc4213671e0, 0x5, 0xc421367200, 0x12, 0x0, 0x0, ...)
	/usr/local/go/src/net/http/transport.go:1143 +0x317
net/http.(*Transport).getConn.func4(0xc4202365a0, 0x18760e0, 0xc420042088, 0xc420912750, 0xc420d3e2a0)
	/usr/local/go/src/net/http/transport.go:957 +0x78
created by net/http.(*Transport).getConn
	/usr/local/go/src/net/http/transport.go:956 +0x363

goroutine 213 [select]:
net.cgoLookupIP(0x18760a0, 0xc420535280, 0xc421367200, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/cgo_unix.go:212 +0x19f
net.(*Resolver).lookupIP(0x2307a00, 0x18760a0, 0xc420535280, 0xc421367200, 0xe, 0x0, 0xc420a6f680, 0xc420534000, 0x0, 0x0)
	/usr/local/go/src/net/lookup_unix.go:95 +0x12d
net.(*Resolver).(net.lookupIP)-fm(0x18760a0, 0xc420535280, 0xc421367200, 0xe, 0x42bdf9, 0x8, 0xc420534000, 0x0, 0xc420ab06a0)
	/usr/local/go/src/net/lookup.go:192 +0x56
net.glob..func10(0x18760a0, 0xc420535280, 0xc420e148b0, 0xc421367200, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/hook.go:19 +0x52
net.(*Resolver).LookupIPAddr.func1(0x0, 0x0, 0x0, 0x0)
	/usr/local/go/src/net/lookup.go:206 +0xd8
internal/singleflight.(*Group).doCall(0x23079f0, 0xc421368640, 0xc421367200, 0xe, 0xc4209127e0)
	/usr/local/go/src/internal/singleflight/singleflight.go:95 +0x2e
created by internal/singleflight.(*Group).DoChan
	/usr/local/go/src/internal/singleflight/singleflight.go:88 +0x2d0
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