> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## 4.11.2

**`(fix):`** Fix a thread-safety bug in the generated OAuth and inferred-auth token
caches. `OAuthTokenSupplier` and `InferredAuthTokenSupplier` now use
double-checked locking with `volatile` cache fields, so the token/header
cache (a singleton shared across all request threads) is refreshed exactly
once under concurrent load (single-flight) and cached values are safely
published across threads. The cache-hit path stays lock-free.
`OAuthAuthProvider`'s existing double-checked locking is corrected by
marking its `accessToken`/`expiresAt` fields `volatile`. No public API
changes; generated code remains Java 8 compatible.