# Non-Idempotent Operation

> An operation whose repetition changes the result, making it unsafe to retry.

Record: `lexicon:non-idempotent-operation`
Kind: anti-pattern
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-non-idempotent-operation

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Fragile Parsing](https://banes-lab.com/records/lexicon/fragile-parsing.md) and before [Shared Resource Pool](https://banes-lab.com/records/lexicon/shared-resource-pool.md).

## Category

- [Error Handling / Resilience](https://banes-lab.com/records/lexicon-category/error-handling-resilience.md)

## Negated by

- [Retry Pattern](https://banes-lab.com/records/architecture/retry-pattern.md)

## Linked from

- [Error Handling / Resilience](https://banes-lab.com/ontology/principles/architecture-category-error-handling-resilience.md)