nomad job run -json panics after successful registration of a periodic job when Job.Periodic.SpecType is not defined

[tristanpemble]

Nomad version

Nomad v1.3.1

Operating system and Environment details

Darwin 21.5.0 Darwin Kernel Version 21.5.0: Tue Apr 26 21:08:37 PDT 2022; root:xnu-8020.121.3~4/RELEASE_ARM64_T6000 arm64 arm unknown Darwin

Issue

When running an API formatted job file (JSON job) via nomad job run -json, and the job has a periodic spec, job registration succeeds, and then the command panics with a SIGSEGV.

Reproduction steps

Create an API job with a Periodic.Spec, but do not define Periodic.SpecType. Run it with nomad job run -json.

Expected Result

The command completes successfully.

Actual Result

The command panics with a SIGSEGV

Job file (if appropriate)

{
  "Datacenters": [
    "dc1"
  ],
  "ID": "foo",
  "Name": "foo",
  "Periodic": {
    "Spec": "* * * * * *"
  },
  "TaskGroups": [
    {
      "Name": "foo",
      "Tasks": [
        {
          "Config": {
            "args": [
              "hello world"
            ],
            "command": "echo"
          },
          "Driver": "raw_exec",
          "Name": "foo"
        }
      ]
    }
  ],
  "Type": "batch"
}

Nomad Server logs (if appropriate)

    2022-07-19T08:06:51.937-0700 [DEBUG] http: request complete: method=PUT path=/v1/jobs duration="353µs"

Nomad Client logs (if appropriate)

Job registration successful
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x101208e98]

goroutine 1 [running]:
github.com/hashicorp/nomad/api.(*PeriodicConfig).Next(0x140007e14a0, {0x37ea8788, 0xeda68bf8b, 0x0})
	github.com/hashicorp/nomad/api@v0.0.0-20220407202126-2eba643965c4/jobs.go:788 +0x28
github.com/hashicorp/nomad/command.(*JobRunCommand).Run(0x14000724a00, {0x1400004e0a0, 0x2, 0x2})
	github.com/hashicorp/nomad/command/job_run.go:355 +0x1044
github.com/mitchellh/cli.(*CLI).Run(0x140003d7680)
	github.com/mitchellh/cli@v1.1.2/cli.go:262 +0x5c4
main.RunCustom({0x1400004e090, 0x3, 0x3})
	github.com/hashicorp/nomad/main.go:115 +0x3a4
main.Run(...)
	github.com/hashicorp/nomad/main.go:85
main.main()
	github.com/hashicorp/nomad/main.go:81 +0x60

Additional Information

I traced the issue down to the nil pointer here, which is called from this path.

This code is called after the job registration succeeds on the server. I believe the root of the issue is that when submitting an API job via the CLI, it is canonicalized server-side, but not client-side. Registration succeeds on the server, and then this code path is called. It references paths that have not been canonicalized with their default values, and fails.

I am new to this codebase, so unsure I have the best approach, but I am submitting a PR that resolved the issue for me.

[tgross]

Hi @tristanpemble! Thanks for the PR #13845. I've left some review comments there.

[tgross]

Fixed in #13845 which will ship in Nomad 1.5.0 (plus backports)