Replit
database
SQLite Database Locked on Replit
SQLite database is locked and transactions timeout. Multiple processes are trying to write simultaneously, causing lock contention.
SQLite isn't designed for concurrent writes like PostgreSQL, making it unsuitable for Replit's multi-process environment.
Error Messages You Might See
database is locked
Database file is locked
Timeout waiting for database lock
SQLite error 5: database is locked
Common Causes
- Multiple Replit instances writing to same SQLite file simultaneously
- Long-running transactions holding locks
- WAL mode not enabled for SQLite
- Timeout set too low for concurrent operations
- SQLite used instead of proper database like PostgreSQL
How to Fix It
Switch to PostgreSQL (Replit's built-in option) for production. If you must use SQLite, enable WAL mode and increase transaction timeout. Ensure only one process writes to SQLite at a time. Avoid SQLite entirely for deployed Replit apps.
Real developers can help you.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
Jaime Orts-Caroff
I'm a Senior Android developer, open to work in various fields
Costea Adrian
Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
Meïr Ankri
Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews.
Dor Yaloz
SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
Supabase expert
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
Victor Denisov
Developer
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.
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Get HelpFrequently Asked Questions
Why is SQLite bad for Replit?
SQLite can't handle multiple concurrent writers. Replit deployments scale to multiple instances, causing lock contention
Should I enable WAL mode?
WAL helps but doesn't solve the underlying concurrency issue. Use PostgreSQL instead