Eclipse error “ADB server didn't ACK, failed t

Question

After updating the SDK, Eclipse shows this error:

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

When I run an Android application, it gives me the following:

Please ensure that adb is correctly located at 'D:\android-sdk-windows\platform-tools\adb.exe' and can be executed.

How can I fix this problem?

Answer 1

We can solve this issue so easily.

1. Open a command prompt, and do cd <platform-tools directory>
2. Run command adb kill-server
3. Open Windows Task manager and check whether adb is still running. If it is, just kill adb.exe
4. Run command adb start-server in the command prompt

Answer 2

ADB will often fail if there is a newline in adb_usb.ini. Remove it, restart it, and that will often solve the problem (at least for me anyway).

Answer 3

I had to allow adb.exe to access my network in my firewall.

Answer 4

Killing Eclipse and then rebooting did not help me. I added the Android tool to the PATH variables, started Task Manager and killed adb.exe.

I restarted Eclipse, and then it worked.

Answer 5

I had a similar issue. Killing an existing instance of the ADB process from Task Manager did not work for me.

Just few days back, I had tried to install MIPS SDK and ADT-17 earlier and Eclipse gave me the error, and I did not fix that issue.

So, now, when I got this ADB server didn't ACK, failed to start daemon... issue, I executed 'Check for Updates' in the Eclipse Help menu item. There were no updates available, but at least 'ADB server did not ACK' error disappeared.

I hope this might help in a few cases.

Answer 6

I met same problem, though I didn't what caused this. Whatever, i find some clues and fixed finally.

When I open SDK and AVD manager, but find the AVD version(2.3.3) is not same with android lib version(2.3). So I create a new AVD with 2.3.

I fixed it by the following steps: 1. Open windows task manager and kill adb.exe process. 2. Close eclipse and restart it. Then it works.

Hope it helps.