panic: unexpected end of JSON input #2374
Description
It looks like if scheduler-state.json is empty (crash or node issue during writing the file? or running out of disk space?), the registry will then crash on startup, until this file is removed.
Perhaps if the state file is corrupted it could recover automatically with a blank state?
Logs:
time="2017-08-18T15:17:05Z" level=info msg="redis not configured" go.version=go1.7.3 instance.id=9a8f36a4-5003-4b89-82ba-68f2a2346646 version=v2.6.0
time="2017-08-18T15:17:05Z" level=info msg="Starting upload purge in 25m0s" go.version=go1.7.3 instance.id=9a8f36a4-5003-4b89-82ba-68f2a2346646 version=v2.6.0
panic: unexpected end of JSON input
goroutine 1 [running]:
panic(0xb4cc80, 0xc420396490)
/usr/local/go/src/runtime/panic.go:500 +0x1a1
github.com/docker/distribution/registry/handlers.NewApp(0x10667c0, 0xc4203b8750, 0xc42036aa80, 0x10667c0)
/go/src/github.com/docker/distribution/registry/handlers/app.go:312 +0x17d4
github.com/docker/distribution/registry.NewRegistry(0x7fad44e9c040, 0xc4203b8750, 0xc42036aa80, 0xe, 0x0, 0x0)
/go/src/github.com/docker/distribution/registry/registry.go:86 +0x213
github.com/docker/distribution/registry.glob..func1(0x108e140, 0xc4203963d0, 0x1, 0x1)
/go/src/github.com/docker/distribution/registry/registry.go:55 +0x106
github.com/docker/distribution/vendor/github.com/spf13/cobra.(*Command).execute(0x108e140, 0xc420396380, 0x1, 0x1, 0x108e140, 0xc420396380)
/go/src/github.com/docker/distribution/vendor/github.com/spf13/cobra/command.go:495 +0x190
github.com/docker/distribution/vendor/github.com/spf13/cobra.(*Command).Execute(0x108e2e0, 0xc4201b7f40, 0xc4200001a0)
/go/src/github.com/docker/distribution/vendor/github.com/spf13/cobra/command.go:560 +0x3c3
main.main()
/go/src/github.com/docker/distribution/cmd/registry/main.go:24 +0x2d
time="2017-08-18T15:17:05Z" level=info msg="using inmemory blob descriptor cache" go.version=go1.7.3 instance.id=9a8f36a4-5003-4b89-82ba-68f2a2346646 version=v2.6.0