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Bug
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Resolution: Not A Defect
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Major
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None
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Centos 7 on local jenkins, Centos 6 on remote
Java 1.8 (open jdk)
When i try to import jenkins job from one instance (centos6.6) to another (centos7) (using plugin) i get error:
FAILED - Unable to read /var/lib/jenkins/jobs/HEAD/config.xml
However, i thought the reason was on the remote jenkins instance, so i tried to import job on 3rd instance (centos6.6 too) and it succeeded.
I think the reason is in OS version difference.
Also i tried to copy job folders manually, then reload config, but still no succeeded, jobs are unseen.
[JENKINS-30529] Import failed when trying to import from another centos version jenkins
Thomas Storm
added a comment - It was missing folder plugin, which was causing errors in job copy, sorry, false alarm
Thomas Storm
added a comment - It was missing folder plugin, which was causing errors in job copy, sorry, false alarm 
John Zhang
added a comment - To me, the problem is because of Maven. I tried to import a list of project. All the projects that have nothing to do with Maven were imported successfully. However, all the Maven projects failed.
I tried to manually copy a Maven project from the jobs directory in the old Jenkins server to the new server, and manage to build it. During this process, I did a lot of Maven configuration, e.g. install maven-related Jenkins plugins, set the Maven in the global tools, etc. After all of these work, I can import the maven jobs now. Fantastic!
John Zhang
added a comment - To me, the problem is because of Maven. I tried to import a list of project. All the projects that have nothing to do with Maven were imported successfully. However, all the Maven projects failed.
I tried to manually copy a Maven project from the jobs directory in the old Jenkins server to the new server, and manage to build it. During this process, I did a lot of Maven configuration, e.g. install maven-related Jenkins plugins, set the Maven in the global tools, etc. After all of these work, I can import the maven jobs now. Fantastic! 
guys, any news?