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feat(rust-provider): add HTTP retry for flagLog writes #452

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cc851e4
feat(rust-provider): add HTTP retry for flagLog writes
nicklasl Jun 18, 2026
ffb0070
feat(rust-provider): add jitter and Retry-After support to flagLog retry
nicklasl Jun 18, 2026
800fee9
docs(rust-provider): document flagLog retry behavior
nicklasl Jun 18, 2026
8047e92
style(rust-provider): fix rustfmt formatting in test
nicklasl Jun 18, 2026
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87 changes: 87 additions & 0 deletions Cargo.lock
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1 change: 1 addition & 0 deletions openfeature-provider/rust/Cargo.toml
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Expand Up @@ -63,6 +63,7 @@ prost-build = "0.12"
tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
tracing-subscriber = { version = "0.3", features = ["env-filter"] }
num_cpus = "1.16"
wiremock = "0.6"

[[example]]
name = "demo"
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10 changes: 6 additions & 4 deletions openfeature-provider/rust/README.md
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Expand Up @@ -9,7 +9,7 @@ A high-performance OpenFeature provider for [Confidence](https://confidence.spot
- **Local Resolution**: Evaluates feature flags locally using the native Rust resolver
- **Low Latency**: No network calls during flag evaluation
- **Automatic Sync**: Periodically syncs flag configurations from Confidence
- **Exposure Logging**: Fully supported exposure logging and resolve analytics
- **Exposure Logging**: Fully supported exposure logging and resolve analytics with automatic retry on transient failures
- **OpenFeature Compatible**: Works with the standard OpenFeature Rust SDK
- **Async/Await**: Built on Tokio for efficient async operations

Expand Down Expand Up @@ -220,10 +220,12 @@ fn main() {
```

The provider logs at different levels:
- `DEBUG`: Flag resolution details, state updates
- `DEBUG`: Flag resolution details, state updates, individual retry attempts
- `INFO`: Provider initialization, configuration
- `WARN`: Non-critical issues, fallbacks
- `ERROR`: Failures, network errors
- `WARN`: Non-critical issues, fallbacks, log delivery failures after retries exhausted
- `ERROR`: Failures, non-retryable HTTP errors

Flag log delivery retries up to 3 times on transient failures (5xx, 408, 429) with exponential backoff (500ms base, 2x multiplier, ±10% jitter). Server `Retry-After` headers are respected when present.

## Shutdown

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