--- title: Staging worked, production broke, what failed under real... description: A production outage caused by connection pool defaults that worked fine in staging but failed under real burst traffic with slow downstream services.... canonical: https://daily.dev/posts/staging-worked-production-broke-what-failed-under-real-traffic--qt47u5qw9 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Staging worked, production broke, what failed under real traffic? | daily.dev og:description: A production outage caused by connection pool defaults that worked fine in staging but failed under real burst traffic with slow downstream services.... og:url: https://daily.dev/posts/staging-worked-production-broke-what-failed-under-real-traffic--qt47u5qw9 og:image: https://api.daily.dev/og/posts/qT47U5QW9.png og:image:alt: Staging worked, production broke, what failed under real traffic? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Staging worked, production broke, what failed under real traffic? **[Rebeloper](https://daily.dev/sources/rebeloper)** · 1 min read · 0 upvotes · 0 comments ## Summary A production outage caused by connection pool defaults that worked fine in staging but failed under real burst traffic with slow downstream services. Connections got stuck waiting, new requests queued behind them, and everything stalled. The fix was setting hard timeouts and failing fast rather than waiting indefinitely. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [The reliability cost of default timeouts](https://daily.dev/posts/the-reliability-cost-of-default-timeouts-1uhreyzlv) · InfoWorld · 1 upvotes · 0 comments - [The Great Connection Pool Meltdown](https://daily.dev/posts/the-great-connection-pool-meltdown-uejdycz6g) · Jacob’s Tech Tavern · 28 upvotes · 0 comments --- Tags: [#backend](https://daily.dev/tags/backend), [#distributed-systems](https://daily.dev/tags/distributed-systems), [#load-testing](https://daily.dev/tags/load-testing) [View this post on daily.dev](https://daily.dev/posts/staging-worked-production-broke-what-failed-under-real-traffic--qt47u5qw9) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Staging worked, production broke, what failed under real traffic?","url":"https://daily.dev/posts/staging-worked-production-broke-what-failed-under-real-traffic--qt47u5qw9","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/staging-worked-production-broke-what-failed-under-real-traffic--qt47u5qw9"},"datePublished":"2026-03-25T05:38:18.346Z","dateModified":"2026-03-25T05:39:38.448Z","description":"A production outage caused by connection pool defaults that worked fine in staging but failed under real burst traffic with slow downstream services....","image":"https://i.ytimg.com/vi/HK_mHgqcruU/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/HK_mHgqcruU/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Rebeloper","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Rebeloper","logo":"https://media.daily.dev/image/upload/s--W0sZL8K4--/f_auto/v1726990075/logos/rebeloper","url":"https://daily.dev/sources/rebeloper"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/staging-worked-production-broke-what-failed-under-real-traffic--qt47u5qw9","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"backend,distributed-systems,load-testing","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"Staging worked, production broke, what failed under real traffic?","description":"A production outage caused by connection pool defaults that worked fine in staging but failed under real burst traffic with slow downstream services....","thumbnailUrl":"https://i.ytimg.com/vi/HK_mHgqcruU/sddefault.jpg","uploadDate":"2026-03-25T05:38:18.346Z","duration":"PT1M","url":"https://api.daily.dev/r/qT47U5QW9","embedUrl":"https://www.youtube.com/embed/HK_mHgqcruU"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Rebeloper","item":"https://daily.dev/sources/rebeloper"},{"@type":"ListItem","position":3,"name":"Staging worked, production broke, what failed under real traffic?"}]} ```