Software⏱️ 2 min read📅 2026-06-03

How to Fix: java.net.ConnectException: Connection refused

Check the port number and firewall settings on the client computer.

Quick Answer: Verify that the client is connecting to the correct port and ensure there are no firewalls blocking the connection.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

The Java.net.ConnectException: Connection refused error occurs when the client program attempts to establish a connection with a server, but the server is not listening on the specified port or is down.

🛑 Root Causes of the Error

  • The server may not be configured to listen on the specified port.
  • The server may be down or not running.
  • The client program's IP address or port number may be incorrect.

✅ Best Solutions to Fix It

Method 1: Verify Server Configuration

  1. Step 1: Check the server's configuration file to ensure it is listening on the specified port.

Method 2: Restart Server

  1. Step 1: Restart the server to ensure it is running and listening on the specified port.

✨ Wrapping Up

To resolve the Java.net.ConnectException: Connection refused error, verify your server's configuration and ensure it is running. If the issue persists, try restarting the server.

Did this fix your problem?

If not, try searching for specific error codes.

🔍 Search Error Database

❓ Frequently Asked Questions

🛠️ Related Fixes

How to Fix: Pc crashes shortly after launching game (rainbow

Fix Pc crashes shortly after launching game (rainbow six siege). Compl

How to Fix: Installing an APK on a locked down phone

Installing an APK on a locked down phone: Try using a rooted device, e

How to Fix: New PC build- no signal and no clue

Fix New PC build- no signal and no clue. Complete troubleshooting guid