Supabase Common Errors

Overview

Quick reference for the top 10 most common Supabase errors and their solutions.

Prerequisites

• Supabase SDK installed
• API credentials configured
• Access to error logs

Instructions

Step 1: Identify the Error

Check error message and code in your logs or console.

Step 2: Find Matching Error Below

Match your error to one of the documented cases.

Step 3: Apply Solution

Follow the solution steps for your specific error.

Output

• Identified error cause
• Applied fix
• Verified resolution

Error Handling

Invalid JWT

Error Message:

Invalid JWT: expired or malformed

Cause: JWT token has expired or is incorrectly formatted

Solution:

Check token expiry with supabase.auth.getSession() and call refreshSession() if needed

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RLS Policy Violation

Error Message:

new row violates row-level security policy for table

Cause: Row Level Security (RLS) policy is blocking the operation

Solution: Check RLS policies in dashboard or via pg_policies table. Ensure user has required role.

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Connection Pool Exhausted

Error Message:

too many clients already

Cause: Connection pool limit reached due to too many concurrent connections

Solution:

Use connection pooling mode in Supabase dashboard. Switch to Session mode or pgBouncer.

Examples

Quick Diagnostic Commands

# Check Supabase status
curl -s https://status.supabase.com

# Verify API connectivity
curl -I https://api.supabase.com

# Check local configuration
env | grep SUPABASE

Escalation Path

1. Collect evidence with supabase-debug-bundle
2. Check Supabase status page
3. Contact support with request ID

Resources

• Supabase Status Page
• Supabase Support
• Supabase Error Codes

Next Steps

For comprehensive debugging, see supabase-debug-bundle.