Android jenkins Emulator偶尔会在启动时无限期挂起

问题：当我试图在Jenkins上构建一个android项目时，emulator偶尔会无限期地挂起在启动时，并且任务完成：未构建

我让Jenkins slaves在Debian EC2实例上运行—不使用任何模拟器快照，每次运行都有一个干净的工作区，因此我无法找出它们之间的区别，为什么有时启动正确，而更多时候启动不正确。 在“通用仿真器选项”中，我选中了选项：“在启动时重置仿真器状态”

詹金斯版本：1.642
Android模拟器插件：2.13.1

...    
    [android] Using Android SDK: /var/lib/jenkins/tools/android-sdk
    [android] Creating Android AVD: /var/lib/jenkins/.android/avd/hudson_it-IT_160_HVGA_android-22_armeabi-v7a.avd
    [android] /var/lib/jenkins/tools/android-sdk/tools/android create avd -f -a -s HVGA -n hudson_it-IT_160_HVGA_android-22_armeabi-v7a -t android-22 --abi armeabi-v7a
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb start-server
    * daemon not running. starting it now on port 6345 *
    * daemon started successfully *
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb start-server
    [android] Starting Android emulator
    $ /var/lib/jenkins/tools/android-sdk/tools/emulator -ports 6343,6344 -prop persist.sys.language=it -prop persist.sys.country=IT -avd hudson_it-IT_160_HVGA_android-22_armeabi-v7a -no-snapshot-load -no-snapshot-save -wipe-data -no-window
    resize2fs 1.42.13 (17-May-2015)
    The filesystem is already 140800 (4k) blocks long.  Nothing to do!

    emulator: WARNING: Increasing RAM size to 1GB
    Creating filesystem with parameters:
        Size: 576716800
        Block size: 4096
        Blocks per group: 32768
        Inodes per group: 7040
        Inode size: 256
        Journal blocks: 2200
        Label: 
        Blocks: 140800
        Block groups: 5
        Reserved block group size: 39
    Created filesystem with 11/35200 inodes and 4536/140800 blocks
    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: warning: opening audio output failed

    emulator: UpdateChecker: skipped version check
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    connected to localhost:6344
    [android] Waiting for emulator to finish booting...
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb -s localhost:6344 shell getprop init.svc.bootanim
    error: device offline
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb connect localhost:6344
    [android] Timed-out after waiting 720 seconds for emulator
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb disconnect localhost:6344
    [android] Stopping Android emulator
    $ /var/lib/jenkins/tools/android-sdk/platform-tools/adb kill-server
    Finished: NOT_BUILT

有人能帮我吗？问题出在哪里，又是什么？ 谢谢大家