Emulator: emulator: ERROR: AdbHostServer.cpp:102: Unable to connect to adb daemon on port: 5037
I am stuck a whole afternoon trying to run again my small Android/Kotlin application in Android Studio. The message pasted on this question topic suddenly nocked me down.
I have done these tentatives:
1 - cold boot (On Virtual Devices screen > Actions > Cold Boot Now)
2 - I deleted my previous Virtual Device and I downloaded a new one (Nexus One)
3 - I followed all steps from other stackoverflow answer
3.1
cd C:\Users\Jimis\AppData\Local\Android\Sdk\platform-tool
adb kill-server
adb.exe start-server
adb devices -l
3.2
deleted plataform-tool and redownlowaded it from SDK Plataform
3.3
restart computer
I am completely stuck.
Something called my attention: why so many PIDs to port 5037. See bellow that initially when I started Androdi Studio I had only 3 and after I tried debug my application I got a lot more.
Microsoft Windows [versão 10.0.18363.836]
(c) 2019 Microsoft Corporation. Todos os direitos reservados.
C:\Users\Jimis>netstat -ano -p tcp |find "5037"
TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 11492
TCP 127.0.0.1:5037 127.0.0.1:50582 ESTABLISHED 11492
TCP 127.0.0.1:50582 127.0.0.1:5037 ESTABLISHED 10052
C:\Users\Jimis>netstat -ano -p tcp |find "5037"
TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 11492
TCP 127.0.0.1:5037 127.0.0.1:50582 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50714 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50731 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50734 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50736 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50737 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50738 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50739 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50740 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50741 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50742 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50743 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50744 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50745 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50746 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50747 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50748 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50749 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50750 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50751 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50752 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50753 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50754 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50755 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50756 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50757 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50758 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50759 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50760 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50761 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50762 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50763 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50764 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50765 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50766 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50767 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50768 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50769 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50770 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50771 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50772 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50773 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50779 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50780 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50781 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50782 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50783 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50784 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50785 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50786 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50787 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50788 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50789 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50790 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50791 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50792 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:50793 ESTABLISHED 11492
TCP 127.0.0.1:5037 127.0.0.1:50794 ESTABLISHED 11492
TCP 127.0.0.1:50582 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50714 127.0.0.1:5037 ESTABLISHED 792
TCP 127.0.0.1:50717 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:50719 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:50722 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:50729 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:50731 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50734 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50736 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50738 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50739 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50740 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50741 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50742 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50743 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50744 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50745 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50746 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50747 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50748 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50749 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50750 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50751 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50752 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50753 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50754 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50755 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50756 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50757 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50758 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50760 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50761 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50762 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50763 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50764 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50765 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50766 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50767 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50768 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50770 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50771 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50772 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50773 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50791 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50793 127.0.0.1:5037 ESTABLISHED 10052
TCP 127.0.0.1:50794 127.0.0.1:5037 ESTABLISHED 10052
C:\Users\Jimis>
Trying to figure out with "netstat -a -b" why so many established connections to same port 5037 I reached this list but I don't if it is normal when using Android Studio and Emulator
...
TCP 127.0.0.1:5037 SPANOT149:0 LISTENING
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50582 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50714 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50731 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50734 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50736 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50738 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50739 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50740 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50741 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50742 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50744 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50745 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50746 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50747 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50748 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50750 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50751 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50753 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50756 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50757 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50760 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50761 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50762 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50763 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50764 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50765 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50766 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50767 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50768 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50770 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50772 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50773 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50793 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50797 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:50955 ESTABLISHED
[adb.exe]
TCP 127.0.0.1:5037 orionhost:51276 ESTABLISHED
[adb.exe]
My app build.gradle
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 29
buildToolsVersion "29.0.3"
android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
defaultConfig {
applicationId "com.mycomp.appfirestore"
minSdkVersion 16
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.72"
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.13'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
// Firebase Libraries
implementation 'com.google.firebase:firebase-core:17.4.2'
implementation 'com.google.firebase:firebase-auth:19.3.1'
implementation 'com.google.firebase:firebase-database:19.3.0'
implementation 'com.google.firebase:firebase-storage:19.1.1'
implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
implementation 'com.squareup.okhttp3:logging-interceptor:4.7.2'
}
Project build.gradle
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
ext.kotlin_version = '1.3.71'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.6.3'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath 'com.google.gms:google-services:4.3.3'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
*** added
in case it is relevant I just aupdated to Android Studio 4.0 and same issue.
Android Studio 4.0
Build #AI-193.6911.18.40.6514223, built on May 20, 2020
Runtime version: 1.8.0_242-release-1644-b01 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 1237M
Cores: 8
Registry: ide.new.welcome.screen.force=true
Non-Bundled Plugins:
Reading a lot on stackoverflow I reached this other issue
I tried added advancedFeatures.ini in my C:\Users....android with
Vulkan = off
GLDirectMem = on
I don't know exactly what I did but I tried it anyway and I am still getting same issue. In this same stackoverflow discussion I noted someone talking about hyper-V.
In case it is relevant, I have turned off Hyper-V some time ago in my Windows 10 because I had to use VirtualBox for other reasons (OpenShift/minishift). I don't think it has relathionship with my issue because until 2 days ago I had not such problem with port 5037. BTW, I am curious: does Androids Emulators depend on HyperV somehow?
*** edited after Jacob's comment
Microsoft Windows [versão 10.0.18363.836] (c) 2019 Microsoft Corporation. Todos os direitos reservados.
1) Before I started Android Studio I had no connection to 5037 as expected
C:\Users>netstat -ano | findstr "5037"
2) Then I started Android Studio and I see at least three connections to port 5037.
C:\Users\Cast>netstat -ano | findstr "5037"
TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 11880
TCP 127.0.0.1:5037 127.0.0.1:54602 ESTABLISHED 11880
TCP 127.0.0.1:54602 127.0.0.1:5037 ESTABLISHED 348
3) And when I click on Debug app (shift + F9) I get two messages errors on left bottom side of Android Studio
Emulator: emulator: ERROR: AdbHostServer.cpp:102: Unable to connect to adb daemon on port: 5037
Emulator: socketTcpLoopbackClientFor: error: fd 56668 above FD_SETSIZE (32768)
and a lot of connections with numerous TIME WAIT. It seems so weird to me.
C:\Users>netstat -ano | findstr "5037"
TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 11880
TCP 127.0.0.1:5037 127.0.0.1:54602 ESTABLISHED 11880
TCP 127.0.0.1:5037 127.0.0.1:54631 ESTABLISHED 11880
TCP 127.0.0.1:5037 127.0.0.1:54643 ESTABLISHED 11880
TCP 127.0.0.1:5037 127.0.0.1:54647 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54648 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54649 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54650 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54662 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54663 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54665 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54666 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54667 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54668 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54669 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54670 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54671 ESTABLISHED 11880
TCP 127.0.0.1:5037 127.0.0.1:54672 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54673 ESTABLISHED 11880
TCP 127.0.0.1:5037 127.0.0.1:54674 TIME_WAIT 0
TCP 127.0.0.1:54602 127.0.0.1:5037 ESTABLISHED 348
TCP 127.0.0.1:54631 127.0.0.1:5037 ESTABLISHED 5224
TCP 127.0.0.1:54634 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:54636 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:54639 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:54641 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:54643 127.0.0.1:5037 ESTABLISHED 348
TCP 127.0.0.1:54671 127.0.0.1:5037 ESTABLISHED 348
TCP 127.0.0.1:54673 127.0.0.1:5037 ESTABLISHED 348
C:\Users>
Whole Event Log
01/06/2020
00:08 Gradle sync started
00:08 * daemon not running; starting now at tcp:5037
00:08 * daemon started successfully
00:08 Gradle sync finished in 2 s 418 ms (from cached state)
00:08 Executing tasks: [:app:assembleDebug] in project C:\WSs\FireStoreDemos\AppFirestore
00:08 Emulator: socketTcpLoopbackClientFor: error: fd 56296 above FD_SETSIZE (32768)
00:08 Emulator: socketTcpLoopbackClientFor: error: fd 56296 above FD_SETSIZE (32768)
00:08 Emulator: emulator: ERROR: AdbHostServer.cpp:102: Unable to connect to adb daemon on port: 5037
00:08 Emulator: socketTcpLoopbackClientFor: error: fd 56668 above FD_SETSIZE (32768)
00:08 Emulator: socketTcpLoopbackClientFor: error: fd 56668 above FD_SETSIZE (32768)
00:08 Emulator: socketTcpLoopbackClientFor: error: fd 56928 above FD_SETSIZE (32768)
00:08 Emulator: socketTcpLoopbackClientFor: error: fd 56928 above FD_SETSIZE (32768)
00:08 Gradle build finished in 19 s 659 ms
00:08 Install successfully finished in 584 ms.: App restart successful without requiring a re-install.
*** edited after changed ADB port
I changed ANDROID_ADB_SERVER_PORT to 5038 in Windows Environment and restart Android Studio and I still see some 5037 waiting for connection.
After changed Environemnt Variable ANDROID_ADB_SERVER_PORT in Windows
C:\Users\>netstat -ano | findstr "5037"
TCP 127.0.0.1:5037 127.0.0.1:54643 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54671 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:54673 TIME_WAIT 0
TCP 127.0.0.1:5037 127.0.0.1:55204 TIME_WAIT 0
TCP 127.0.0.1:54602 127.0.0.1:5037 TIME_WAIT 0
TCP 127.0.0.1:54631 127.0.0.1:5037 TIME_WAIT 0
C:\Users\>netstat -ano | findstr "5038"
TCP 127.0.0.1:5038 0.0.0.0:0 LISTENING 7912
TCP 127.0.0.1:5038 127.0.0.1:55238 ESTABLISHED 7912
TCP 127.0.0.1:55238 127.0.0.1:5038 ESTABLISHED 11368
Answer
This is likely caused by insufficient permissions. Run Android Studio or your command prompt (whichever you prefer) as an administrator and that should solve your problem.