Emulator did not appear to start; giving up

[Al-Amin Talukdar]

Hi everyone, I am using Jenkins 2.19.1 with Andriod Emulator 2.15 from Centos 7
Seems everything is performing well just Emulator is not starting. Here is my full log. 
Please help me out. Thanks in Advance

Started by user Timam
Building in workspace /var/lib/jenkins/workspace/stockfishchess-android
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://github.com/timam/stockfishchess-android # timeout=10
Fetching upstream changes from https://github.com/timam/stockfishchess-android
 > git --version # timeout=10
 > git fetch --tags --progress https://github.com/timam/stockfishchess-android +refs/heads/*:refs/remotes/origin/*
 > git rev-parse refs/remotes/origin/master^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/master^{commit} # timeout=10
Checking out Revision ef6f205deea6ac2b1f88dcf9b616ad15813797e9 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f ef6f205deea6ac2b1f88dcf9b616ad15813797e9
 > git rev-list ef6f205deea6ac2b1f88dcf9b616ad15813797e9 # timeout=10
$ /var/lib/jenkins/tools/android-sdk/tools/android list target
[android] Using Android SDK: /var/lib/jenkins/tools/android-sdk
[android] Adding 64M SD card to AVD 'hudson_en-US_240_WVGA_android-16_armeabi-v7a_stockfishchess'...
$ /var/lib/jenkins/tools/android-sdk/platform-tools/adb start-server
* daemon not running. starting it now on port 5866 *
* daemon started successfully *
$ /var/lib/jenkins/tools/android-sdk/platform-tools/adb start-server
$ /var/lib/jenkins/tools/android-sdk/tools/emulator -snapshot-list -no-window -avd hudson_en-US_240_WVGA_android-16_armeabi-v7a_stockfishchess
WARNING: Force to use classic engine to support snapshot.
[android] Starting Android emulator and creating initial snapshot
[android] Erasing existing emulator data...
$ /var/lib/jenkins/tools/android-sdk/tools/emulator -engine classic -ports 5802,5803 -report-console tcp:5859,max=60 -prop persist.sys.language=en -prop persist.sys.country=US -avd hudson_en-US_240_WVGA_android-16_armeabi-v7a_stockfishchess -no-snapshot-load -no-snapshot-save -wipe-data
WARNING: Force to use classic engine to support snapshot.
QXcbConnection: Could not connect to display 
emulator: WARNING: Classic qemu does not support SMP. The hw.cpu.ncore option from your config file is ignored.
[android] Emulator did not appear to start; giving up
[android] Stopping Android emulator
$ /var/lib/jenkins/tools/android-sdk/platform-tools/adb kill-server
Finished: NOT_BUILT

[Slide]

Did you look here? https://wiki.jenkins-ci.org/display/JENKINS/Android+Emulator+Plugin#AndroidEmulatorPlugin-Runningonheadlessbuildmachines

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[Al-Amin Talukdar]

Hi Slide, Thanks for your reply.
I have followed that wiki.