Flask insights

Open SourceVersions: [3.1.3]21 metrics

OpenTelemetry·

Blueprint not registered causes complete route unavailabilitycritical

flask.request.status_4xx

11d ago▸

Trailing slash mismatch causes unexpected redirects or 404swarning

flask.request.status_3xx flask.request.status_4xx

11d ago▸

Module with routes never imported causes route not foundcritical

flask.request.status_4xx

11d ago▸

Debug mode enabled in production allows arbitrary code executioncritical

11d ago▸

Gunicorn module path misconfiguration causes all routes to 404

flask.request.status_4xx

11d ago▸

Nginx path stripping breaks Flask routing

flask.request.status_4xx

11d ago▸

WSGI path prefix mismatch causes 404 when app mounted at subpathwarning

11d ago▸

Blueprint url_prefix misconfiguration causes wrong route pathwarning

flask.request.status_4xx

11d ago▸

HTTP method mismatch returns 405 instead of 200warning

11d ago▸

Worker pool exhaustion causes exact 60-second request hangs

gunicorn.workers gunicorn.worker.connections gunicorn.request.duration

technetexperts.com

1mo ago▸

Excessive database queries slow response times

http.server.request.duration

1y ago▸

Unoptimized database queries cause performance degradation

http.server.request.duration

1y ago▸

Missing cache for frequently accessed data increases database load

http.server.request.duration

1y ago▸

Synchronous task execution blocks request handling

http.server.request.duration http.server.active_requests

1y ago▸

Excessive caching causes high memory usage and cache thrashing

process.resident_memory_bytes process.virtual_memory_bytes

1y ago▸

Improper async programming causes deadlocks and synchronization issues

1y ago▸

Flask page load degrades as database size increases

http.server.request.duration

callumrollo.com

1y ago▸

Fetching all MongoDB records then filtering client-side causes 40x slowdown

http.server.request.duration

callumrollo.com

1y ago▸

Expensive database aggregations run on every request without cachingwarning

http.server.request.duration

callumrollo.com

1y ago▸

Cache thread safety issues with uWSGI multi-process deploymentinfo

callumrollo.com

1y ago▸

Single-worker Flask/FastAPI apps degrade severely under concurrent load

http.server.request.duration http.server.active_requests

1y ago▸

Low CPU and memory usage during high response times indicates worker starvation

process.cpu_seconds_total process.resident_memory_bytes http.server.request.duration

1y ago▸

Slow page loads and resource exhaustion require profiling to identify bottleneckswarning

http.server.request.duration process.cpu_seconds_total process.resident_memory_bytes

1y ago▸

N+1 query problem adds hundreds of milliseconds per request

1y ago▸

Memory exhaustion from loading large datasets entirely into memorywarning

process.resident_memory_bytes

1y ago▸

ProfilerMiddleware adds overhead in production environmentsinfo

1y ago▸

ProcessPoolExecutor processes hold memory indefinitely without max_tasks_per_child

stackoverflow.com

2y ago▸

Flask uncaught exceptions not logged by Gunicorn

gunicorn.exceptions gunicorn.log.error

stackoverflow.com

6d ago▸

Flask error handlers not registered when defined in non-imported module with Gunicorn

gunicorn.exceptions gunicorn.log.error

community.plotly.com

6d ago▸

Async background tasks silently cancelled on view return

flask.request.error

betterstack.com

6d ago▸