OkHttp3.Call doesn't have timeout by default

[bacek]

Describe the bug
Java Client is using OkHttp3.Call for most (all?) of processing. Default OkHttp3.Call doesn't have timeout configured.

Which leads to problems like apiClient hanging in case of network bleeps.

Client Version
19.0.0

Kubernetes Version
1.26

Java Version
Java 11

To Reproduce
Steps to reproduce the behavior:

Expected behavior
apiClient calls not to hang forever.

Additional context
We have tightly locked k8s cluster with Istio. We submit a lot (1000+) jobs to k8s using batch/job.

When load burst happens, istio-proxy can have some hiccup, with errors like this:

WARNING: A connection to https://172.20.0.1/ was leaked. Did you forget to close a response body? To see where this was allocated, set the OkHttpClient logger level to FINE: Logger.getLogger(OkHttpClient.class.getName()).setLevel(Level.FINE);

When this happen call

batchApi.createNamespacedJob(this.namespace, job, null, null, "k8sBatchService", FIELD_VALIDATION);

just hangs forever.

[brendandburns]

You can set various timeouts on the apiClient:

https://github.com/kubernetes-client/java/blob/master/kubernetes/src/main/java/io/kubernetes/client/openapi/ApiClient.java#L461

Does that help you?

[bacek]

You can set various timeouts on the apiClient:

https://github.com/kubernetes-client/java/blob/master/kubernetes/src/main/java/io/kubernetes/client/openapi/ApiClient.java#L461

Does that help you?

It's missing callTimeout. Which is root cause for this issue.

[brendandburns]

Ok. This would require an upstream change in the code generator here:

https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache

If someone sends a PR there, we can then incorporate it into this library.

If you don't want to do that, you can also manually create the HTTP client yourself and pass it in to ApiClient:

https://github.com/kubernetes-client/java/blob/master/kubernetes/src/main/java/io/kubernetes/client/openapi/ApiClient.java#L152

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/lifecycle stale

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/lifecycle rotten

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Reopen this issue with /reopen
• Mark this issue as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/close not-planned

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