Unable to find log file when start the alpha node

Users Badger
1

when I restart the dgraph alpha,it would occur this exception:Unable to find log file. Please retry. I don’t have any ways to solve it.
The total logfile is find in this logfile.txt (6 KB)

2019/11/12 03:05:26 Error while creating badger KV posting store error: Unable to find log file. Please retry
github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger.init.ializers
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger/errors.go:66
runtime.main
	/usr/local/go/src/runtime/proc.go:188
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1337
failed to read value pointer from vlog file: {Fid:238 Len:1844 Offset:29808603}
github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger.(*valueLog).populateDiscardStats
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger/value.go:1441
github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger.(*valueLog).open
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger/value.go:855
github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger.Open
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger/db.go:317
github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger.OpenManaged
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/dgraph-io/badger/managed_db.go:26
github.com/dgraph-io/dgraph/edgraph.(*ServerState).initStorage
	/tmp/go/src/github.com/dgraph-io/dgraph/edgraph/server.go:170
github.com/dgraph-io/dgraph/edgraph.InitServerState
	/tmp/go/src/github.com/dgraph-io/dgraph/edgraph/server.go:77
github.com/dgraph-io/dgraph/dgraph/cmd/alpha.run
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/alpha/run.go:465
github.com/dgraph-io/dgraph/dgraph/cmd/alpha.init.1.func1
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/alpha/run.go:81
github.com/dgraph-io/dgraph/vendor/github.com/spf13/cobra.(*Command).execute
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/spf13/cobra/command.go:702
github.com/dgraph-io/dgraph/vendor/github.com/spf13/cobra.(*Command).ExecuteC
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/spf13/cobra/command.go:783
github.com/dgraph-io/dgraph/vendor/github.com/spf13/cobra.(*Command).Execute
	/tmp/go/src/github.com/dgraph-io/dgraph/vendor/github.com/spf13/cobra/command.go:736
github.com/dgraph-io/dgraph/dgraph/cmd.Execute
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/root.go:60
main.main
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/main.go:33
runtime.main
	/usr/local/go/src/runtime/proc.go:200
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1337
2

I met the same problem.before restart,how did you stop your alpha node.if I stop the alpha by shell command ‘kill’.it was happened frequently

3

The alpha node may shut down by a mistake, however I could not capture any useful information in the alpha log. Then we meet this problem. This is a very serious situation, especially when we use dgraph in the product environment.

4

maybe the error occured by alpha node shutdown ungraceful(ig. mistake or kill)

5

If there is a “lock” file in any path, please delete it and try again. If not so, this must be some mistake. Have you upgraded jumping its versions?

The right way to upgrade https://docs.dgraph.io/deploy/#upgrade-database

What OS are you using? if you’re in windows, please upgrade.

6

This issue was fixed in badger via Fix discard stats moved by GC bug by jarifibrahim · Pull Request #929 · dgraph-io/badger · GitHub . Latest dgraph should have the fix for this.

7

Hi,it will be fixed by the next Dgraph version? now,I used v1.1.0

8

Looks like v1.1.0 actually has the fix for this issue. dgraph/value.go at ef7cdb287c3242b9350765bc7e87f5e2924c84af · dgraph-io/dgraph · GitHub

Are you sure you’re seeing the same issue on Dgraph v1.1.0?

9

Oh,I have not met the problem again.

10

Thanks，we use the dgraph 1.0.16 version. We will upgrade our dgraph and check this.