Replit performance

Async Request Timeout on Replit

Asynchronous requests timeout before completing, even though operation should finish quickly. Async operations hang indefinitely.

Misconfigured timeout values or blocking operations in async code cause hangs.

Error Messages You Might See

java.util.concurrent.TimeoutException AsyncRequestTimeoutException Connection timeout
java.util.concurrent.TimeoutExceptionAsyncRequestTimeoutExceptionConnection timeout

Common Causes

  1. Timeout value too short for actual operation time
  2. Blocking operation on async thread
  3. Deadlock in async task handling
  4. Thread pool exhausted, tasks queued indefinitely
  5. Missing error handling for timeout exception

How to Fix It

Set appropriate timeouts based on operation nature (5-30s). Use non-blocking async libraries (WebClient, Mono, Flux). Configure thread pool appropriately. Implement proper exception handling for TimeoutException. Use CompletableFuture.orTimeout() or Flux.timeout() for time limits. Monitor thread pool metrics.

Real developers can help you.

Jaime Orts-Caroff Jaime Orts-Caroff I'm a Senior Android developer, open to work in various fields Anthony Akpan Anthony Akpan Developer with 8 years of experience building softwares fro startups Tejas Chokhawala Tejas Chokhawala Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript. Focused on performance, clean architecture and shipping fast. Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools. Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well. David Olverson David Olverson Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production. Pratik Pratik SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure legrab legrab I'll fill this later Matt Butler Matt Butler Software Engineer @ AWS MFox MFox Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking. Milan Surelia Milan Surelia Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems. Expertise: 💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web. 🖋️ Sharing insights through technical writing, blogging, and open-source contributions. 🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences. Notable Achievements: 🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX. 🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development. 🌟 Open source contributions on Github & StackOverflow for Flutter & Dart 🎖️ Worked on improving app performance and user experience with smart solutions. Milan is always happy to connect, work on new ideas, and explore the latest in technology.

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Frequently Asked Questions

What timeout should async requests have?

5-10s for local operations, 10-30s for external APIs

How do I use WebClient with timeout?

WebClient.create() with HttpClient.create().responseTimeout(Duration.ofSeconds(10))

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