Problems with adb.exe - AdbHostServer.cpp:93: Unable to connect to adb daemon on port: 5037

Question

I have a problem with adb.exe of Android Studio 3.4.

When I run the emulator, I get this error:

Emulator: emulator: ERROR: AdbHostServer.cpp:9

Answer 1

1. Check JAVA_HOME, NODE_HOME and ANDROID_HOME paths in environment variables. If they are not available, set them.

2. Cold Boot your emulator.

3. Kill appium server session if it is running. Then re-run the appium server

4. Run your program through IDE

Answer 2

https://developer.android.com/studio/run/emulator-acceleration.html

I did add this AMD VM installation. Some how I feel that its working how. But few errors still exists. Few Port error has gone.

This error still there while the port access error has vanished.

Emulator: socketTcpLoopbackClientFor: error: fd 60640 above FD_SETSIZE (32768)

Surprise thing is that the same was working in Similar Laptop HP with Ryzon processor few days back. My old laptop crashed and its a new one. Different between the LT is just 8/16 GB ram. Older LT has McAfee while this has Windows defender. I added the adb.exe process in the Exclution list in Windows Defender now.

Answer 3

If you have any port utilizing software like Xampp, Vmware workstation, or virtual box they normally utilize the port through which the Android Studio can access the devices. Therefore,

1. On your Android Studio interface click on Assistant
2. It will show you Troubleshoot your connection
3. click on next until you see Restart ADB Server
4. do that until it restarts.

Answer 4

I had this with flutter. I updated Flutter and Dart to latest version and it resolved.

Answer 5

I had this happen with the following Event Log entry:

Emulator: emulator: ERROR: AdbHostServer.cpp:102: Unable to connect to adb daemon on port: 5037

So I opened command prompt as administrator and ran netstat -a -b >c:\connections.txt and found the following:

 [Amazon Music Helper.exe]
  TCP    127.0.0.1:5037         jbiss-PC:0             LISTENING
 [adb.exe]
  TCP    127.0.0.1:5037         jbiss-PC:54858         ESTABLISHED
.
.
.
[ss_conn_service.exe]
  TCP    127.0.0.1:51146        jbiss-PC:5037          CLOSE_WAIT
.
.
.
 [adb.exe]
  TCP    127.0.0.1:54858        jbiss-PC:5037          ESTABLISHED

So I shut down Amazon Music Helper, shut down and restarted Android Studio and then launched the emulator. It works now. I'm not sure why I started having this problem today, I assume that Amazon Music Helper was involved previously and the status indicated ESTABLISHED for adb.exe, but I did, and this process cleared it up for now at least.

Answer 6

You need to first run adb start-server and then run emulator -avd <avd_name>