time: time.Ticker hangs

[outofforest]

Go version

go version go1.24.3 linux/amd64

Output of go env in your module/workspace:

AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE=''
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/home/wojciech/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/home/wojciech/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1906100182=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/home/wojciech/sources/magma/go.mod'
GOMODCACHE='/home/wojciech/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/home/wojciech/go'
GOPRIVATE=''
GOPROXY='direct'
GOROOT='/usr/lib/golang'
GOSUMDB='off'
GOTELEMETRY='local'
GOTELEMETRYDIR='/home/wojciech/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='local'
GOTOOLDIR='/usr/lib/golang/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.3'
GOWORK=''
PKG_CONFIG='pkg-config'

What did you do?

package main

import (
	"fmt"
	"time"
)

func main() {
	t := time.NewTicker(20 * time.Millisecond)
	for v := range t.C {
		fmt.Println(v)
	}
}

What did you see happen?

Program hangs (stops printing) pretty quickly, after 3-20 seconds.

What did you expect to see?

Time being printed until I stop the program.

[seankhliao]

this doesn't look actionable, it's most likely to be something in your environment that's interrupting your process.

I don't think we can help you here with general troubleshooting
https://github.com/golang/go/wiki/Questions

[gabyhelp]

Related Issues

• A goroutine problem? #32513 (closed)
• Program hangs and never terminates #16611 (closed)
• affected/package: x/time/rate #50490 (closed)
• affected/package: #57137 (closed)
• About the use of time.NewTicker() #31182 (closed)
• Abnormal number increment #46098 (closed)
• affected/package: #54340 (closed)
• runtime: huge performance drops in a timer application #35395 (closed)
• time: timer gets significantly delayed during long time GC #45632
• channel <- time.Now(). Program reached a deadlock #25685 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[outofforest]

Indeed, rebooting machine helped.