Troubleshooting ADB Server Version Mismatch Errors

Troubleshooting ADB Server Version Mismatch Errors

5 April 2024 Stephan Petzl Leave a comment Tech-Help

If you’ve been working with Android development tools, you might encounter an error where the ADB server version does not match the ADB client version. This can lead to the inability to connect to your Android device for debugging purposes.

This error typically reads as follows:

adb server version (36) doesn't match this client (39); killing...
adb E 03-27 08:01:55 2925 147690 usb_osx.cpp:333] Could not open interface: e00002c5
adb E 03-27 08:01:55 2925 147690 usb_osx.cpp:294] Could not find device interface
error: could not install *smartsocket* listener: Address already in use
ADB server didn't ACK
* failed to start daemon *
error: cannot connect to daemon

Let’s walk through some steps to resolve this issue.

Resolution Steps

Here are some practical steps to resolve the ADB server version mismatch:

  1. Check Your Environment Path

    Ensure that your PATH environment variable is pointing to the correct version of the platform-tools directory. For example:

    export PATH=$PATH:/Users/your_username/Library/Android/sdk/platform-tools
  2. Kill Running ADB Processes

    Use the following commands to identify and kill any running ADB processes that might be causing the conflict:

    ps aux | grep adb
    kill -9 [PID]

    Replace [PID] with the process ID of the adb process.

  3. Reinstall ADB

    If you’re using Android Studio, you can attempt to fix the issue by reinstalling ADB:

    1. Open Android Studio and go to Tools -> SDK Manager.
    2. In the SDK Tools tab, uncheck Android SDK Platform-Tools and apply to uninstall.
    3. Rename the platform-tools directory (optional).
    4. Re-check Android SDK Platform-Tools to reinstall.
  4. Managing Multiple ADB Versions

    If you have multiple versions of ADB installed (e.g., one from Homebrew and one from Android Studio), you may need to remove or rename one of them to avoid conflicts.

  5. Check for Conflicting Applications

    Some applications, like Genymotion or Helium, may run their own version of ADB. Ensure these applications are not running or configure them to use the correct version of ADB.


By following these steps, you should be able to resolve the ADB server version mismatch error and successfully connect to your Android device for debugging. Remember to always check your environment settings and manage conflicting applications to prevent similar issues.

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