Technologies/Celery/celery.task.failed
CeleryCeleryMetric

celery.task.failed

Tasks failed with exception
Dimensions:None
Available on:Native (1)PrometheusPrometheus (1)DatadogDatadog (1)
Interface Metrics (3)
Native
Number of tasks that failed with an exception
Dimensions:None
PrometheusPrometheus
Total number of tasks that failed with an exception
Dimensions:None
DatadogDatadog
Number of tasks that failed with an exception
Dimensions:None
Sources
task-faileddocs.celeryq.dev
celery_task_failed_totalgithub.com
celery.task.failedgithub.com

Technical Annotations (34)

Configuration Parameters (9)
max_retriesrecommended: 5
Reasonable retry limit to avoid endless loops
acks_laterecommended: True
ensures failed tasks remain in queue for retry
retry_backoffrecommended: exponential with base ~10 seconds
prevents overwhelming resources during retries
retry_jitterrecommended: enabled
prevents synchronized retry bursts
countdownrecommended: dynamic based on retry count
sets initial retry delay
task_acks_laterecommended: True
Acknowledges tasks only after completion to prevent data loss
task_reject_on_worker_lossrecommended: True
Ensures task rejection on worker failure
task_acks_on_failure_or_timeoutrecommended: False
Default True causes silent task loss on failures
task_reject_on_worker_lostrecommended: True
Requeues tasks when worker dies unexpectedly
Error Signatures (1)
Task requeue attempts exceeded max; marking failedlog pattern
CLI Commands (3)
celery -A proj inspect activemonitoring
start_http_server(8000)monitoring
celery inspect active_queuesdiagnostic
Technical References (21)
exponential backoffconceptPrometheuscomponentGrafanacomponentFlowercomponentSentrycomponentautoretry_forparameterretry_kwargsparametertask timeoutconceptexecution timeconceptdead-letter queueconceptDataDogcomponentprometheus-clientcomponenttask_preruncomponenttask_postruncomponentorphaned tasksconceptWebSocketprotocolCeleryTaskHighFailRateconcepttask exceptions tablecomponentairflow-providers-celerycomponentCeleryExecutorcomponentrequeue limitconcept
Related Insights (20)
Transient errors resolved through automatic retries with exponential backoffinfo
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Unhandled exceptions cause task disruptionscritical
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Network latency increases task execution time by 25%warning
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Aggressive periodic task scheduling causes 25% failure increasewarning
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Inadequate monitoring leads to 65% delayed problem resolutionwarning
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Misconfigured retry settings cause 40% of unexpected task failurescritical
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Exponential backoff reduces failure rates by 30% under high loadwarning
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Tasks exceeding average execution time by 30% are 65% more prone to failureswarning
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Dead-letter queues prevent data loss during task failuresinfo
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Monitoring tools reduce downtime by 30% through proactive issue detectioninfo
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Retry rate exceeding 0.5% indicates broker or task bottleneckswarning
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Task failure rate above 2% signals critical stability issuescritical
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Prometheus metrics integration reduces MTTD by 40%info
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Silent task failures cause delayed detection and revenue losscritical
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Task success rate below 99.95% indicates systemic issueswarning
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Celery tasks acknowledge failures by default causing silent data losscritical
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Task success rate below 95% indicates systemic execution problemswarning
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Reduced downtime through continuous monitoring implementationinfo
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High Celery task failure rate indicates systematic processing issuescritical
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Airflow health check fails to detect Celery worker queue consumer losscritical
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