--- title: Keep your promises when using Cloud Functions for Firebase! description: Explains a common pitfall when writing Cloud Functions for Firebase in Node.js: failing to properly track and combine all asynchronous promises before... canonical: https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Keep your promises when using Cloud Functions for Firebase! | daily.dev og:description: Explains a common pitfall when writing Cloud Functions for Firebase in Node.js: failing to properly track and combine all asynchronous promises before... og:url: https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw og:image: https://api.daily.dev/og/posts/9tAwqIBuw.png og:image:alt: Keep your promises when using Cloud Functions for Firebase! 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. # Keep your promises when using Cloud Functions for Firebase! **[Firebase](https://daily.dev/sources/firebase-blog)** · 4 min read · 0 upvotes · 0 comments ## Summary Explains a common pitfall when writing Cloud Functions for Firebase in Node.js: failing to properly track and combine all asynchronous promises before returning from a function. When individual async operations aren't aggregated with Promise.all(), Cloud Functions may terminate the function before network connections finish, producing an ECONNRESET error. The fix is to collect every promise from concurrent async work and return a combined Promise.all() so the function only resolves after everything truly completes. Links to a video explanation and an open source tic-tac-toe example for more complex function patterns. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why am I getting an ECONNRESET error in my Firebase Cloud Functions logs? ECONNRESET in Cloud Functions logs often happens when a function terminates before all its network connections finish, forcibly closing open connections. This occurs when a function starts multiple async operations but only returns the promise for one of them, so Cloud Functions cleans up the function instance before the other operations complete. _Developers debugging serverless function errors can find practical fixes like this one on daily.dev._ ### How do I properly return multiple promises from a Firebase Cloud Function? Combine every promise from concurrent async work using Promise.all() and return the resulting combined promise, rather than returning only the last operation's promise. For example, capture each call like const promise_x = doSomeAsync(x), then return Promise.all([promise_x, promise_y, promise_z]) so the function only resolves once all work is truly finished. _daily.dev surfaces concrete patterns like this for developers writing reliable serverless functions._ ## Similar posts on daily.dev - [JavaScript Async Lifetimes: Fix Your Leaking Code \(2026\)](https://daily.dev/posts/javascript-async-lifetimes-fix-your-leaking-code-2026--n2ucnhmvn) · Alex CloudStar · 2 upvotes · 0 comments - [Rethinking async loops in JavaScript](https://daily.dev/posts/rethinking-async-loops-in-javascript-zktafkvag) · Matt Smith · 6 upvotes · 1 comments - [Medium](https://daily.dev/posts/medium-ef2a4qqot) · Medium · 0 upvotes · 0 comments - [How to Go from Toy API Calls to Production-Ready Networking in JavaScript](https://daily.dev/posts/how-to-go-from-toy-api-calls-to-production-ready-networking-in-javascript-urjuzdobr) · freeCodeCamp · 2 upvotes · 0 comments - [Is Promise.all still relevant in 2025?](https://daily.dev/posts/is-promise-all-still-relevant-in-2025--pqrcmhpqz) · LogRocket · 8 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#firebase](https://daily.dev/tags/firebase), [#gcp-cloud-functions](https://daily.dev/tags/gcp-cloud-functions) [View this post on daily.dev](https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw) ```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":"Keep your promises when using Cloud Functions for Firebase!","url":"https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw"},"datePublished":"2026-08-23T12:18:41.487Z","dateModified":"2026-08-23T12:34:27.620Z","description":"Explains a common pitfall when writing Cloud Functions for Firebase in Node.js: failing to properly track and combine all asynchronous promises before...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7ed721de96163685d26ab7e314be3ebc?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7ed721de96163685d26ab7e314be3ebc?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Firebase","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":"Firebase","logo":"https://media.daily.dev/image/upload/s--i395oqZH--/f_auto,q_auto/v1787487448/logos/firebase-blog?_a=BAMAMicg0","url":"https://daily.dev/sources/firebase-blog"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"javascript,firebase,gcp-cloud-functions","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Firebase","item":"https://daily.dev/sources/firebase-blog"},{"@type":"ListItem","position":3,"name":"Keep your promises when using Cloud Functions for Firebase!"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/keep-your-promises-when-using-cloud-functions-for-firebase--9tawqibuw#faq","mainEntity":[{"@type":"Question","name":"Why am I getting an ECONNRESET error in my Firebase Cloud Functions logs?","acceptedAnswer":{"@type":"Answer","text":"ECONNRESET in Cloud Functions logs often happens when a function terminates before all its network connections finish, forcibly closing open connections. This occurs when a function starts multiple async operations but only returns the promise for one of them, so Cloud Functions cleans up the function instance before the other operations complete. Developers debugging serverless function errors can find practical fixes like this one on daily.dev."}},{"@type":"Question","name":"How do I properly return multiple promises from a Firebase Cloud Function?","acceptedAnswer":{"@type":"Answer","text":"Combine every promise from concurrent async work using Promise.all() and return the resulting combined promise, rather than returning only the last operation's promise. For example, capture each call like const promise_x = doSomeAsync(x), then return Promise.all([promise_x, promise_y, promise_z]) so the function only resolves once all work is truly finished. daily.dev surfaces concrete patterns like this for developers writing reliable serverless functions."}}]} ```