retry5

Retry5 is a software concept and, in some ecosystems, a library used to implement retry logic for operations that may fail due to transient conditions. It focuses on automatically retrying failed calls with configurable limits and timing, in order to improve reliability without overwhelming the system.

The design separates the retry policy from the operation itself. It typically provides pluggable components or adapters to define how many attempts are allowed, what constitutes a retryable error, and how long to wait between attempts. It supports synchronous and asynchronous execution and can be integrated into different programming languages.

Common features include multiple backoff strategies such as constant, linear, exponential, and jittered variants; customizable retry limits; timeouts; and cancellation support. Some implementations also offer telemetry hooks, logging integration, and optional circuit-breaker coordination to avoid retry storms.

Typical use cases include HTTP requests, database queries, message publishing, and other I/O operations where transient faults are likely. A typical policy may specify up to five retries with backoff, hence the name in some contexts, but exact limits vary by implementation.

See also: retry policy, exponential backoff, jitter, transient fault handling, Polly (as a well-known resilience library), and related retry-pattern literature.