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  1. OpenShift Bugs
  2. OCPBUGS-49844

[openshift-apiserver] Etcd client can unsafely retry timeouts on mutating requests

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Undefined Undefined
    • None
    • 4.18.0, 4.19.0
    • openshift-apiserver
    • Yes
    • Rejected
    • False
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      Description of problem:

      Our carry patch intended to retry retriable requests that fail due to leader change will retry any etcd error with code "Unavailable": https://github.com/openshift/kubernetes/blob/4b2db1ec33faa3ffc305e5ffa7376908cc955370/staging/src/k8s.io/apiserver/pkg/storage/etcd3/etcd3retry/retry_etcdclient.go#L135-L145, but this includes reasons like "timeout" and does not distinguish between writes and reads. So a "timeout" error on a writing request might be retried even though a "timeout" observed by a client does not indicate that the effect of the write has not been persisted.

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      Actual results:

      Expected results:

      Additional info:

              bluddy Ben Luddy
              bluddy Ben Luddy
              Ke Wang Ke Wang
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                Created:
                Updated: