redocly/cli lint hangs for a while before exiting

[philipnbbc]

Describe the bug

Running version >= v1.0.0-beta.127 (latest is v1.0.0-beta.129) of redocly/cli Docker results in the validation completing and then the process sits there for a while before exiting. The wait time can be significant (30 sec) for larger OpenAPI spec files.

To Reproduce
Steps to reproduce the behavior:

A small OpenAPI file, example.yaml:

openapi: 3.0.3
info:
  title: Test
paths:
  /:
    get:
      responses:
        '200':

1. Given the OpenAPI example file shown above
2. Run docker run --rm -v $PWD:/spec redocly/cli lint example.yaml
3. It outputs "run redocly lint --generate-ignore-file to add all problems to the ignore file." and then sits there for a couple seconds
4. Run docker run --rm -v $PWD:/spec redocly/cli:v1.0.0-beta.126 lint example.yaml and it exits immediately

Using a larger OpenAPI file results in a longer and more significant hang time.

Expected behavior

It shouldn't, or it is unclear why it would hang for a while before exiting.

Redocly Version(s)

Issue is with Docker image redocly/cli version >= v1.0.0-beta.127 (latest == v1.0.0-beta.129)

[philipnbbc]

Tried something... It turns out it hangs when behind a proxy. I assume it is attempting to make a HTTP request?

Can that behavior be disabled? Switching telemetry off doesn't make a difference: docker run --rm -e REDOCLY_TELEMETRY=off -v $PWD:/spec redocly/cli lint example.yaml

[lornajane]

Thanks for the update, although you've disproved my working hypothesis which was that the telemetry could cause a problem despite our testing on it! We'll take a look and keep you posted.

[tatomyr]

Hi @philipnbbc,
Could you check if setting env variable CI=true solves this?

[philipnbbc]

Could you check if setting env variable CI=true solves this?

I ran docker run --rm -e CI=true -v $PWD:/spec redocly/cli lint example.yaml and the issue remains.

The output of tcpdump showed DNS queries for api.redocly.com.

[tatomyr]

Which version is this? Could you also switch off the telemetry? My last guess is this is a combo 😅

[philipnbbc]

🎉 That did the trick. It returns immediately and tcpdump no longer shows api.redocly.com. This was the latest / v1.0.0-beta.129 version.

[yuan1238y]

I tried set the environment REDOCLY_TELEMETRY=off resolve this problem.
This version is v1.0.0-beta.129

[philipnbbc]

I tried set the environment REDOCLY_TELEMETRY=off resolve this problem.
This version is v1.0.0-beta.129

I double-checked what works for me.

• -e REDOCLY_TELEMETRY=off: results in a delay and tcpdump shows lookups for registry.npmjs.org
• -e CI=true: results in a delay and tcpdump shows lookups for api.redocly.com
• -e REDOCLY_TELEMETRY=off -e CI=true: results in no delay and tcpdump show no lookups

[tatomyr]

@philipnbbc, @yuan1238y,

Could you check whether the issue has been resolved in version 1.0.0-beta.130? Now it should exit correctly without additional env variables.