Pending state
A pending state is a lifecycle condition in which an operation or process has not yet produced a final outcome.
Secrets of the JavaScript Ninja, Second Edition
The promise state in which the final outcome has not yet been determined.
- How it is used
- Marks a promise whose asynchronous result is not yet known.
- How deep it goes
- Defines the state transitions to fulfillment or rejection and notes that settled promises cannot switch states.
- Examples
- Uses a 500-millisecond timeout to delay resolving a promise with “Hattori.”
- What you can do after
- Understand how pending differs from fulfilled and rejected promise states.
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Acing the Certified Kubernetes Administrator Exam, Second Edition
A pending state is a Kubernetes pod phase in which the pod has been accepted but is not yet running, commonly because it has not been scheduled.
- How it is used
- Uses pending pods as an operational signal for investigating scheduling and control-plane failures.
- How deep it goes
- Explains scheduler-focused diagnosis with kubectl logs, kubectl describe, events, and static-pod manifests.
- Examples
- Uses an nginx Deployment whose original replica runs while two replicas remain Pending after scaling.
- What you can do after
- Diagnose unscheduled pods with kubectl describe, kubectl logs, pod events, and control-plane manifest inspection.
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Rust Servers, Services, and Apps
Poll::Pending is a Rust polling result indicating that an asynchronous computation is not yet ready to produce its output.
- How it is used
- Signals to an async executor that a polled computation is not ready, allowing other tasks to run.
- How deep it goes
- Defines the result and traces it through a custom timer future, a Waker, and executor rescheduling.
- Examples
- Uses an expiration timer and a second task to demonstrate pending work and later completion.
- What you can do after
- Build a custom timer future that returns pending until expiration and wakes its executor task.
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Related concepts
- promisepart of · A JavaScript Promise is an object representing the eventual completion or failure of an asynchronous operation and its resulting value or reason.
- readycontrasts with · Poll::Ready is a Rust asynchronous computation result containing the computation's completed output.
- spinnerproduces · A spinner is an animated user-interface indicator that signals an ongoing, pending, or waiting operation without specifying its completion state.
- pending setused by · A pending set is the set returned by asyncio.wait containing awaitables that have not completed when the wait returns.
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