go runtime_error ai_generated true

rpc error: code = FailedPrecondition desc = resource version conflict: expected 3, got 5

ID: go/grpc-failed-precondition-state-mismatch

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-10-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.0 active — — —
1.1 active — — —

Root Cause

The request violates a precondition, such as an outdated resource version in an optimistic concurrency control scenario.

generic

中文

请求违反了先决条件，例如在乐观并发控制场景中资源版本过时。

Workarounds

  1. 90% success Fetch the latest resource version and retry the update. 
    currentResource, err := client.GetResource(ctx, &pb.GetRequest{Id: id})
if err != nil { return err }
req.Version = currentResource.Version
resp, err := client.UpdateResource(ctx, req)
  2. 85% success Implement a retry loop with backoff to handle concurrent updates. 
    for i := 0; i < 3; i++ {
    resp, err := client.UpdateResource(ctx, req)
    if err == nil { return resp }
    if status.Code(err) != codes.FailedPrecondition { return err }
    time.Sleep(100 * time.Millisecond)
    // Refresh resource
}

Dead Ends

Common approaches that don't work:

  1. Retry the same request without updating the version. 100% fail

    The version mismatch will persist, causing the same error.

  2. Ignore the version and force the update. 80% fail

    This can lead to data corruption or lost updates.