Permanent failure
A permanent failure is a failure condition that is not resolved by repeating the same operation without changing the request or relevant system conditions.
Think Distributed Systems
A failure whose subsequent occurrence is certain and whose resolution requires manual intervention.
- How it is used
- Classifies failures by recurrence likelihood and repair behavior when analyzing distributed-system reliability.
- How deep it goes
- Defines permanent failure through conditional probability and manual repair, contrasting it with two autorepairing failure types.
- Examples
- Uses a departing employee to model permanent failure within a distributed-company analogy.
- What you can do after
- Evaluate whether a failure is self-repairing or requires intervention by examining recurrence likelihood and repair behavior.
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Distributed Machine Learning Patterns
A permanent failure is a failure condition expected to persist such that retrying is ineffective.
- How it is used
- Diagnoses machine-learning workflow failures before allocating resources to retries or alternative tasks.
- How deep it goes
- Explains root-cause checks, dependency recovery, resource verification, and runtime metadata, but does not specify a framework implementation.
- Examples
- Uses lost in-memory data, preempted workers, out-of-memory errors, and memory-usage spikes during model training.
- What you can do after
- Diagnose/debug with it by distinguishing ineffective retries from recoverable failures and restarting prerequisite workflow steps when necessary.
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Related concepts
- retrycontrasts with · A retry is a subsequent attempt to perform an operation after an earlier attempt fails or does not complete successfully.
- dead letter queueaddresses · A dead-letter queue is a destination that stores messages or records that cannot be delivered or processed normally for later inspection, retry, handling, or disposal.
- deadlockproduced by · A deadlock is a state in concurrent execution where two or more activities are indefinitely blocked by dependencies on resources, events, or progress that cannot become available.
- transient failurecontrasts with · A transient failure is a temporary failure condition that may resolve on its own or not recur when an operation is attempted again.
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