Supabase Connection Timeout - Auth or Database Requests Hang
Requests to Supabase hang indefinitely or timeout after 30 seconds. Login, signup, or database queries never complete.
The app connects fine locally but fails on deployment, or works initially then starts timing out under load.
Error Messages You Might See
Common Causes
- Supabase URL or API key incorrect or not loaded from env
- Network firewall blocking Supabase API domain
- Session token expired and refresh failing silently
- Database query taking too long without timeout handling
- RLS (Row Level Security) policies blocking all queries
How to Fix It
Verify environment variables: console.log(process.env.NEXT_PUBLIC_SUPABASE_URL)
Add timeout to Supabase client: const client = createClient(url, key, { realtime: { timeout: 10000 } })
Check RLS policies on tables - ensure logged-in users can actually select/insert
Use Supabase dashboard to test queries directly
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Get HelpFrequently Asked Questions
How do I debug Supabase RLS issues?
Test queries in Supabase dashboard SQL editor logged in as your user. Check RLS policies in table settings
What's a good timeout for Supabase queries?
10-15 seconds for most queries. Increase for complex aggregations
Why does Supabase work locally but not deployed?
Check that NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY are set in deployment environment