Troubleshooting Guide: Fixing SonarQube Server Connection Issues at http://localhost:9000

Experiencing issues when trying to connect to your SonarQube server at http://localhost:9000? Worry not! This guide will help you troubleshoot and fix common issues that may cause connection problems with your SonarQube server. Follow the step-by-step instructions below to diagnose and resolve your issues.

Table of Contents

  1. Verify SonarQube Server is Running
  2. Check Firewall and Network Configuration
  3. Inspect SonarQube Logs
  4. Validate SonarQube Configuration
  5. FAQ

Verify SonarQube Server is Running

Step 1: Check SonarQube Process

First, ensure that the SonarQube server is running. You can do this by checking the process list on your system.

On Windows

Open the Task Manager (Ctrl + Shift + Esc) and look for a process named wrapper.exe or sonarqube.exe.

On Linux

Open a terminal and run the following command:

ps aux | grep sonarqube

If you don't see the SonarQube process running, start it by following the official SonarQube documentation.

Step 2: Verify Server Port

By default, SonarQube runs on port 9000. Verify that the server is listening on this port.

On Windows

Open the Command Prompt and run the following command:

netstat -an | findstr :9000

On Linux

Open a terminal and run the following command:

netstat -tuln | grep :9000

If the server is not listening on port 9000, check the SonarQube configuration and ensure the correct port is set.

Check Firewall and Network Configuration

Step 1: Disable Firewall Temporarily

Sometimes, the firewall on your system may block incoming connections to the SonarQube server. Try disabling the firewall temporarily to check if it's causing the issue.

On Windows

Open the Control Panel, navigate to System and Security > Windows Defender Firewall, and click on "Turn Windows Defender Firewall on or off."

On Linux

Check your distribution's documentation on how to disable the firewall temporarily.

Step 2: Test Connection

After disabling the firewall, try connecting to the SonarQube server again at http://localhost:9000. If the connection is successful, add an exception for SonarQube in your firewall settings and re-enable the firewall.

Inspect SonarQube Logs

SonarQube logs can provide valuable information on why the server might be experiencing issues. The logs are located in the logs folder of your SonarQube installation directory.

Check the web.log, es.log, and ce.log files for any error messages or stack traces that might hint at the issue.

Validate SonarQube Configuration

Ensure that your SonarQube configuration is correct. The main configuration file is located in the conf folder of your SonarQube installation directory.

  • Verify that the and sonar.web.port properties are set correctly.
  • Ensure that the database connection settings are correct.

For more information on configuring SonarQube, refer to the official documentation.


Q: Can I change the default port for SonarQube?

Yes, you can change the default port by editing the file and modifying the sonar.web.port property. For example, to change the port to 9090, set sonar.web.port=9090.

Q: How do I restart the SonarQube server?

On Windows, stop the SonarQube service using the Services management console, and then start it again. On Linux, use the script located in the bin folder of your SonarQube installation directory. Run ./ stop to stop the server and ./ start to start it.

Q: What are the minimum system requirements for running SonarQube?

The minimum system requirements for running SonarQube are 2 GB of RAM and a recent version of JDK 11. For more details, refer to the official documentation.

Q: How can I view the status of the SonarQube server?

You can view the server status by visiting the http://localhost:9000/system URL. This page provides information on the server's health and system information.

Q: Can I run SonarQube on a different operating system?

Yes, SonarQube is platform-independent and can run on Windows, Linux, and macOS. Ensure that you have the correct version of JDK 11 installed on your system.

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