backend-concurrency-review

To detect race conditions in backend code, you need to review shared mutable state, threading, and async flows for unsafe mutation and missing synchronization. Analyzing singletons, static fields, and concurrent collection access flags atomicity problems before release.

Reviewing async and threading logic requires evaluating CompletableFuture, async/await, goroutines, and callbacks for missed awaits and lost exceptions. Checking cancellation gaps and background work ensures concurrent tasks handle failures correctly without silently dropping errors.

Checking for idempotency violations in retryable write operations involves analyzing retry logic for duplicate external side effects. Reviewing retried operations ensures that concurrent or repeated execution does not cause inconsistent state or unintended duplicate writes.

Yes, the review process evaluates deadlock risk and backpressure concerns by analyzing lock-based synchronization and lock ordering. Assessing concurrent collection safety and backpressure issues ensures your backend system handles contention without freezing or overwhelming resources.

Shared state mutation causes concurrency bugs when multiple threads or tasks access singletons, static fields, or module globals without proper synchronization. Evaluating shared mutable state access identifies unsafe concurrent modifications that lead to data corruption and race conditions.

When reviewing backend synchronization mechanisms, look for race conditions, atomicity violations, concurrent collection misuse, and deadlock risk. Evaluating lock-based synchronization and exception handling in threading flows ensures safe coordination of concurrent tasks.