Resolving Eclipse Error: “ADB server didn’t ACK, failed to start daemon”

Resolving Eclipse Error: "ADB server didn't ACK, failed to start daemon"

22 April 2024 Stephan Petzl Leave a comment Tech-Help

Developing Android applications can sometimes present unexpected challenges, such as issues with the Android Debug Bridge (ADB). One common error encountered in Eclipse is:

ADB server didn’t ACK, failed to start daemon.

This error typically occurs after updating the SDK and can prevent applications from running correctly. Below, we provide a clear guide to help you resolve this problem efficiently.

Step-by-Step Solution

Follow these steps to resolve the ADB server error in Eclipse:

  1. Terminate the ADB Process:

    Open the Task Manager by pressing CTRL+Shift+Esc. Search for any running adb.exe processes and end them. This can also be done via terminal using the following commands:

    • For macOS: killall adb
    • For Windows: adb kill-server
  2. Restart Eclipse:

    Close Eclipse if it is currently running on your computer, then restart the program.

Additional Troubleshooting Steps

If the above solution does not work, consider the following troubleshooting methods:

  • Check for port conflicts on port 5037, which ADB uses. You can do this with the command netstat -aon | findstr 5037 in the command prompt.
  • If you find a conflict, identify the process using the port and terminate it.
  • Some users have reported that Genymotion can cause conflicts with ADB. If you use Genymotion, ensure it’s configured to use the same ADB as your Android SDK.
  • Verify that there is no newline character at the end of the adb_usb.ini file. This has been known to cause issues with ADB.

Integrating with Repeato

Once your ADB server issue is resolved, you might be looking to streamline your testing process. Repeato is a No-code test automation tool that can help. It’s particularly fast to edit and run tests for your Android and iOS apps. With Repeato, you can:

  • Create, run, and maintain automated tests based on computer vision and AI without writing any code.
  • Work with various app frameworks like React Native, Flutter, Unity, etc.
  • Execute ADB commands directly within your automated tests through “script steps.”

Repeato’s intuitive interface and powerful features can ensure your app is robust and reliable, without the added complexity of traditional automation tools.


Resolving the “ADB server didn’t ACK, failed to start daemon” error is usually a matter of terminating the conflicting ADB process and restarting Eclipse. For more persistent issues, a deeper investigation into port conflicts or configuration files may be necessary. Once resolved, consider leveraging the power of Repeato to enhance your testing workflow and ensure a high-quality product for your users.

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