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cmd/trace: goroutine in unexpected state #17719

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mkevac opened this issue Nov 1, 2016 · 4 comments
Closed

cmd/trace: goroutine in unexpected state #17719

mkevac opened this issue Nov 1, 2016 · 4 comments
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
Milestone
Go1.8

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@mkevac
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mkevac commented Nov 1, 2016

Go version and env:

go version devel +032d150 Tue Nov 1 05:42:33 2016 +0000 linux/amd64

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/marko/goprojects"
GORACE=""
GOROOT="/home/marko/go"
GOTOOLDIR="/home/marko/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build068272964=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"

Collect trace with

$ wget http://cppbig105.mlan:13004/debug/pprof/trace?seconds=2 -O lakafka.trace
--2016-11-01 13:37:30--  http://cppbig105.mlan:13004/debug/pprof/trace?seconds=2
Resolving cppbig105.mlan (cppbig105.mlan)... 10.10.147.106
Connecting to cppbig105.mlan (cppbig105.mlan)|10.10.147.106|:13004... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/octet-stream]
Saving to: ‘lakafka.trace’

lakafka.trace                                           [              <=>                                                                                                ]  17.79M  3.62MB/s    in 4.9s    

2016-11-01 13:37:38 (3.62 MB/s) - ‘lakafka.trace’ saved [18649791]

Execute trace tool

$ go tool trace lakafka.trace

Go to "Goroutine analysis" then select one of the goroutines.
No chart will apper and there is an error in log:

$ go tool trace lakafka.trace
2016/11/01 13:37:39 Parsing trace...
2016/11/01 13:37:50 Serializing trace...
2016/11/01 13:37:51 Splitting trace...
2016/11/01 13:37:56 Opening browser
2016/11/01 13:38:02 failed to generate trace: expected G 481 to be in state 1, but got state 2
^C

Full trace: lakafka.trace.zip
@quentinmit quentinmit changed the title go tool trace gives errors on correctly collected trace cmd/trace: goroutine in unexpected state Nov 1, 2016
@quentinmit quentinmit added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Nov 1, 2016
@quentinmit quentinmit added this to the Go1.8 milestone Nov 1, 2016
@quentinmit
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/cc @aclements

@rsc rsc modified the milestones: Go1.8Maybe, Go1.8 Nov 3, 2016
@aclements
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This will be fixed by https://go-review.googlesource.com/c/32810/ (hadn't noticed this bug when I wrote the CL).

@aclements aclements added NeedsFix The path to resolution is known, but the work has not been done. and removed NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. labels Nov 9, 2016
@rsc rsc modified the milestones: Go1.8, Go1.8Maybe Nov 11, 2016
@ianlancetaylor
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@aclements Is CL 32810 going to get into 1.8? Can you add "Fixes #17719" to the CL, so that it is attached on the release dashboard? Thanks.

@gopherbot
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CL https://golang.org/cl/32810 mentions this issue.

@golang golang locked and limited conversation to collaborators Nov 18, 2017
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