Build failed in Jenkins: JMeter-trunk #7573

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See <https://builds.apache.org/job/JMeter-trunk/7573/display/redirect?page=changes>

Changes:

[sitnikov.vladimir] GitHub Actions: actions/checkout@master -> v1.1.0 to avoid unexpected

[felix.schumacher] Update to jackson 2.10.1


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Started by an SCM change
Started by an SCM change
Running as SYSTEM
[EnvInject] - Loading node environment variables.
Building remotely on H23 (ubuntu) in workspace <https://builds.apache.org/job/JMeter-trunk/ws/>
No credentials specified
Cloning the remote Git repository
Cloning repository https://gitbox.apache.org/repos/asf/jmeter.git
 > git init <https://builds.apache.org/job/JMeter-trunk/ws/> # timeout=10
Fetching upstream changes from https://gitbox.apache.org/repos/asf/jmeter.git
 > git --version # timeout=10
 > git fetch --tags --progress -- https://gitbox.apache.org/repos/asf/jmeter.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url https://gitbox.apache.org/repos/asf/jmeter.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url https://gitbox.apache.org/repos/asf/jmeter.git # timeout=10
Fetching upstream changes from https://gitbox.apache.org/repos/asf/jmeter.git
 > git fetch --tags --progress -- https://gitbox.apache.org/repos/asf/jmeter.git +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 a2051bf7b0d407495800aeb895f0896a3f2fa348 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f a2051bf7b0d407495800aeb895f0896a3f2fa348
Commit message: "Update to jackson 2.10.1"
 > git rev-list --no-walk d3d7fdd91679406dfbadceaf0afaa8e95106e7cc # timeout=10
Xvfb starting$ /usr/bin/Xvfb :1 -fbdir /home/jenkins/jenkins-slave/xvfb-7573-..fbdir1226755012093090345
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
(EE) 
Fatal server error:
(EE) Cannot establish any listening sockets - Make sure an X server isn't already running(EE) 

ERROR: Xvfb failed to start, consult the lines above for errors
Archiving artifacts
Recording test results
ERROR: Step ?Publish JUnit test result report? failed: No test report files were found. Configuration error?

Jenkins build is back to normal : JMeter-trunk #7574

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See <https://builds.apache.org/job/JMeter-trunk/7574/display/redirect?page=changes>