500 Internal Server: load artifact from S3

[wanghong230]

Is this a BUG REPORT or FEATURE REQUEST?:
BUG
What happened:

time="2018-09-06T23:20:31Z" level=fatal msg="500 Internal Server Error\ngithub.com/argoproj/argo/errors.Wrap\n\t/root/go/src/github.com/argoproj/argo/errors/errors.go:87\ngithub.com/argoproj/argo/errors.InternalWrapError\n\t/root/go/src/github.com/argoproj/argo/errors/errors.go:70\ngithub.com/argoproj/argo/workflow/artifacts/s3.(*S3ArtifactDriver).Load\n\t/root/go/src/github.com/argoproj/argo/workflow/artifacts/s3/s3.go:65\ngithub.com/argoproj/argo/workflow/executor.(*WorkflowExecutor).LoadArtifacts\n\t/root/go/src/github.com/argoproj/argo/workflow/executor/executor.go:134\ngithub.com/argoproj/argo/cmd/argoexec/commands.loadArtifacts\n\t/root/go/src/github.com/argoproj/argo/cmd/argoexec/commands/init.go:35\ngithub.com/argoproj/argo/cmd/argoexec/commands.glob..func1\n\t/root/go/src/github.com/argoproj/argo/cmd/argoexec/commands/init.go:17\ngithub.com/argoproj/argo/vendor/github.com/spf13/cobra.(*Command).execute\n\t/root/go/src/github.com/argoproj/argo/vendor/github.com/spf13/cobra/command.go:750\ngithub.com/argoproj/argo/vendor/github.com/spf13/cobra.(*Command).ExecuteC\n\t/root/go/src/github.com/argoproj/argo/vendor/github.com/spf13/cobra/command.go:831\ngithub.com/argoproj/argo/vendor/github.com/spf13/cobra.(*Command).Execute\n\t/root/go/src/github.com/argoproj/argo/vendor/github.com/spf13/cobra/command.go:784\nmain.main\n\t/root/go/src/github.com/argoproj/argo/cmd/argoexec/main.go:15\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:195\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:2337"

What you expected to happen:

It should be working.

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Argo version:

$ argo version

• Kubernetes version :

$ kubectl version -o yaml

Other debugging information (if applicable):

• workflow result:

$ argo get <workflowname>

• executor logs:

$ kubectl logs <failedpodname> -c init
$ kubectl logs <failedpodname> -c wait

• workflow-controller logs:

$ kubectl logs -n kube-system $(kubectl get pods -l app=workflow-controller -n kube-system -o name)

[kshamajain99]

duplicate of #1081

[jessesuen]

Closing as dup