title: Jenkins Android Emulator error: device 'localhost:7903' not found (the emulator starts but the connection to it fails)
body: <p>I have installed Jenkins with Android Emulator Plugin on my MacMini. But emulator does not work:</p>
  
  <p>Here is the log:</p>
  
  <pre><code>[android] Starting Android emulator
  [android] Erasing existing emulator data...
  $ /Users/Shared/Jenkins/android-sdk/tools/emulator -ports 7903,7904 -prop persist.sys.language=en -prop persist.sys.country=US -avd hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins -no-snapshot-load -no-snapshot-save -wipe-data -no-window -verbose
  resize2fs 1.42.13 (17-May-2015)
  The filesystem is already 51200 (4k) blocks long.  Nothing to do!
  
  emulator: found SDK root at /Users/Shared/Jenkins/android-sdk
  emulator: Android virtual device file at: /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.ini
  emulator: virtual device content at /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd
  emulator: virtual device config file: /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/config.ini
  emulator: using core hw config path: /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/hardware-qemu.ini
  emulator: Found AVD target API level: 19
  emulator: Read property file at /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//build.prop
  emulator: No boot.prop property file found.
  emulator: found skin 'HVGA' in directory: /Users/Shared/Jenkins/android-sdk/platforms/android-19/skins
  emulator: autoconfig: -skin HVGA
  emulator: autoconfig: -skindir /Users/Shared/Jenkins/android-sdk/platforms/android-19/skins
  emulator: found skin-specific hardware.ini: /Users/Shared/Jenkins/android-sdk/platforms/android-19/skins/HVGA/hardware.ini
  emulator: keyset loaded from: /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/default.keyset
  emulator: trying to load skin file '/Users/Shared/Jenkins/android-sdk/platforms/android-19/skins/HVGA/layout'
  emulator: skin network speed: 'full'
  emulator: skin network delay: 'none'
  emulator: autoconfig: -kernel /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//kernel-qemu
  emulator: Auto-detect: Kernel image requires legacy device naming scheme.
  emulator: Auto-detect: Kernel does support YAFFS2 partitions.
  emulator: autoconfig: -ramdisk /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//ramdisk.img
  emulator: Using initial system image: /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//system.img
  emulator: autoconfig: -data /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/userdata-qemu.img
  emulator: autoconfig: -initdata /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/userdata.img
  emulator: autoconfig: -cache /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/cache.img
  emulator: autoconfig: -sdcard /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/sdcard.img
  emulator: Physical RAM size: 512MB
  
  emulator: autoconfig: -snapstorage /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/snapshots.img
  emulator: GPU emulation is disabled
  emulator: WARNING: CPU acceleration only works with x86/x86_64 system images.
  Content of hardware configuration file:
    hw.cpu.arch = arm
    hw.cpu.model = cortex-a8
    hw.ramSize = 512
    hw.screen = touch
    hw.mainKeys = yes
    hw.trackBall = yes
    hw.keyboard = no
    hw.keyboard.lid = no
    hw.keyboard.charmap = qwerty2
    hw.dPad = yes
    hw.gsmModem = yes
    hw.gps = yes
    hw.battery = yes
    hw.accelerometer = yes
    hw.audioInput = yes
    hw.audioOutput = yes
    hw.sdCard = yes
  
    disk.cachePartition = yes
    disk.cachePartition.path = /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/cache.img
    disk.cachePartition.size = 66m
    hw.lcd.width = 320
    hw.lcd.height = 480
    hw.lcd.depth = 16
    hw.lcd.density = 160
    hw.lcd.backlight = yes
    hw.gpu.enabled = no
    hw.initialOrientation = portrait
    hw.camera.back = emulated
    hw.camera.front = none
    vm.heapSize = 48
    hw.sensors.proximity = yes
    hw.sensors.magnetic_field = yes
    hw.sensors.orientation = yes
    hw.sensors.temperature = yes
    hw.useext4 = yes
    kernel.path = /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//kernel-qemu
    kernel.parameters =  androidboot.hardware=goldfish android.checkjni=1
    kernel.newDeviceNaming = no
    kernel.supportsYaffs2 = yes
    disk.ramdisk.path = /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//ramdisk.img
    disk.systemPartition.initPath = /Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//system.img
    disk.systemPartition.size = 550m
    disk.dataPartition.path = /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/userdata-qemu.img
    disk.dataPartition.initPath = /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/userdata.img
    disk.dataPartition.size = 200m
    disk.snapStorage.path = /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/snapshots.img
    avd.name = hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins
  .
  QEMU options list:
  emulator: argv[00] = "/Users/Shared/Jenkins/android-sdk/tools/emulator64-arm"
  emulator: argv[01] = "-boot-property"
  emulator: argv[02] = "persist.sys.language=en"
  emulator: argv[03] = "-boot-property"
  emulator: argv[04] = "persist.sys.country=US"
  emulator: argv[05] = "-android-ports"
  emulator: argv[06] = "7903,7904"
  emulator: argv[07] = "-android-hw"
  emulator: argv[08] = "/Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/hardware-qemu.ini"
  Concatenated QEMU options:
   /Users/Shared/Jenkins/android-sdk/tools/emulator64-arm -boot-property persist.sys.language=en -boot-property persist.sys.country=US -android-ports 7903,7904 -android-hw /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/hardware-qemu.ini
  emulator: Starting QEMU main loop
  emulator:     trying to find: /Users/Shared/Jenkins/android-sdk/tools/lib/ca-bundle.pem
  
  emulator: registered 'boot-properties' qemud service
  emulator: registered 'boot-properties' qemud service
  emulator: Adding boot property: 'persist.sys.language' = 'en'
  emulator: Adding boot property: 'persist.sys.country' = 'US'
  emulator: Using kernel serial device prefix: ttyS
  emulator: Ramdisk image contains fstab.goldfish file
  emulator: Found format of system partition: 'ext4'
  emulator: Found format of userdata partition: 'ext4'
  emulator: Found format of cache partition: 'ext4'
  emulator: system partition format: ext4
  emulator: Mapping 'system' partition image to /tmp/android-jenkins/emulator-dyB0c4
  emulator: nand_add_dev: system,size=0x22600000,file=/tmp/android-jenkins/emulator-dyB0c4,initfile=/Users/Shared/Jenkins/android-sdk/system-images/android-19/default/armeabi-v7a//system.img,pagesize=512,extrasize=0
  Creating filesystem with parameters:
      Size: 209715200
      Block size: 4096
      Blocks per group: 32768
      Inodes per group: 6400
      Inode size: 256
      Journal blocks: 1024
      Label: 
      Blocks: 51200
      Block groups: 2
      Reserved block group size: 15
  Created filesystem with 11/12800 inodes and 1865/51200 blocks
  emulator: userdata partition format: ext4
  emulator: nand_add_dev: userdata,size=0xc800000,file=/Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/userdata-qemu.img,initfile=/Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/userdata.img,pagesize=512,extrasize=0
  emulator: cache partition format: ext4
  emulator: Creating empty cache partition image at: /Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/cache.img
  Creating filesystem with parameters:
      Size: 69206016
      Block size: 4096
      Blocks per group: 32768
      Inodes per group: 4224
      Inode size: 256
      Journal blocks: 1024
      Label: 
      Blocks: 16896
      Block groups: 1
      Reserved block group size: 7
  Created filesystem with 11/4224 inodes and 1302/16896 blocks
  emulator: nand_add_dev: cache,size=0x4200000,file=/Users/Shared/Jenkins/Home/jobs/Champion/workspace/.android/avd/hudson_en-US_240_HVGA_android-19_armeabi-v7a_jenkins.avd/cache.img,pagesize=512,extrasize=0
  emulator: Adding boot property: 'dalvik.vm.heapsize' = '48m'
  emulator: Adding boot property: 'ro.config.low_ram' = 'true'
  emulator: Adding boot property: 'qemu.sf.lcd_density' = '160'
  emulator: Adding boot property: 'qemu.hw.mainkeys' = '1'
  emulator: Adding boot property: 'qemu.sf.fake_camera' = 'back'
  emulator: Kernel parameters: qemu.gles=0 qemu=1 console=ttyS0 android.qemud=ttyS1 androidboot.hardware=goldfish android.checkjni=1 ndns=1
  emulator: warning: opening audio input failed
  
  emulator: Forcing ro.adb.qemud to "0".
  emulator: sent '0012host:emulator:7904' to ADB server
  emulator: android_hw_fingerprint_init: fingerprint qemud listen service initialized
  
  emulator: Failed to parse AndroidStudio preferences file usage.statistics.xml
  emulator: Defaulting user crash-report opt-in to false
  emulator: Skipping metrics reporting: No user opt-in.
  emulator: UpdateChecker: skipped version check
  goldfish_fb_get_pixel_format:170: display surface,pixel format:
    bits/pixel:  16
    bytes/pixel: 2
    depth:       16
    red:         bits=5 mask=0xf800 shift=11 max=0x1f
    green:       bits=6 mask=0x7e0 shift=5 max=0x3f
    blue:        bits=5 mask=0x1f shift=0 max=0x1f
    alpha:       bits=0 mask=0x0 shift=0 max=0x0
  $ /Users/Shared/Jenkins/android-sdk/platform-tools/adb connect localhost:7904
  unable to connect to localhost:7904: Connection refused
  [android] Waiting for emulator to finish booting...
  $ /Users/Shared/Jenkins/android-sdk/platform-tools/adb -s localhost:7904 shell getprop init.svc.bootanim
  error: device 'localhost:7904' not found
  $ /Users/Shared/Jenkins/android-sdk/platform-tools/adb connect localhost:7904
  $ /Users/Shared/Jenkins/android-sdk/platform-tools/adb -s localhost:7904 shell getprop init.svc.bootanim
  error: device 'localhost:7904' not found
  </code></pre>
  
  <p>I have tried different emulators (API level 15,16,17,18,19,20). I have also tried different Android Emulator Plugin-Versions (2.13.1 and 2.10). Nothing seems to work. Please help.</p>