Cannot autoinstall jdk 8 on my Jenkins, don't know JDK ID. Please help!

[Viktorija Dzedzej]

Using strategy: Default
Last Built Revision: Revision d37b1d8bfb810c37bab726ff14444f1b733b407b (origin/master)
Installing JDK  Java SE Development Kit 8u60
java.io.IOException: JDK data is empty.
	at hudson.tools.JDKInstaller.locate(JDKInstaller.java:418)
	at hudson.tools.JDKInstaller.performInstallation(JDKInstaller.java:134)
	at hudson.tools.InstallerTranslator.getToolHome(InstallerTranslator.java:68)
	at hudson.tools.ToolLocationNodeProperty.getToolHome(ToolLocationNodeProperty.java:107)
	at hudson.tools.ToolInstallation.translateFor(ToolInstallation.java:205)
	at hudson.model.JDK.forNode(JDK.java:130)
	at hudson.model.AbstractProject.getEnvironment(AbstractProject.java:351)
	at hudson.model.Run.getEnvironment(Run.java:2234)
	at hudson.model.AbstractBuild.getEnvironment(AbstractBuild.java:917)
	at hudson.plugins.git.GitSCM.checkout(GitSCM.java:933)
	at hudson.model.AbstractProject.checkout(AbstractProject.java:1270)
	at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:609)
	at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:531)
	at hudson.model.Run.execute(Run.java:1741)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:374)
Finished: FAILURE

[Victor Martinez]

Have you tried to upgrade your Jenkins version? It seems there were some tickets (which they are already solved):

- https://issues.jenkins-ci.org/browse/JENKINS-22401

- https://issues.jenkins-ci.org/browse/JENKINS-22347

Have you configured your global settings and configure the JDK installation setup? Can you choose any specific JDK version? 

Cheers

[Matias Burni]

Hola Victor! (I'm your "replacement" at King, so weird finding this thread with your comment!!! You're so famous!).

>> NOT RELATED TO this post:

    In fact I have an issue with the "Install from java.sun.com dropdown list, which is now a text box. the /var/lib/jenkins/hudson.tools.JDKInstaller.xml is well configured, but when the file /var/lib/jenkins/updates/hudson.tools.JDKInstaller is systematically deleted. :(

[Mark Waite]

I thought I encountered these types of problems when I changed from one internal JDK version (like JDK 1.8.0_45) to another internal JDK version (like 1.8.0_65).  Unfortunately, I don't remember anything more about it, other than being annoyed that my docker instance with jobs that referenced Oracle download versions of JDK 8 were being broken unexpectedly.

I finally surrendered and switched to hosting a local download location for the JDK.  That has been quite reliable.

Mark Waite

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[Matias Burni]

I found the solution.
The JDK installation is a Jenkins feature, which has 2 main config files which disappeared from the master:

•  /var/lib/jenkins/updates/hudson.tools.JDKInstaller.json (I recovered the file from http://ftp.icm.edu.pl/packages/jenkins/updates/stable-1.625/updates/hudson.tools.JDKInstaller.json , I had to rework the json file as it was corrupted with some comments. This file contains the available JDK for the dropDown list)
  
• IF this file is corrupted Jenkins delete it systematically... that was my issue
• /var/lib/jenkins/hudson.tools.JDKInstaller.xml (This file contains the credentials of the Oracle user to pull and install the JDKs)

I restored these files, I restarted Jenkins config job and voila!

[Victor Martinez]

Thanks! Great explanation :)

Afaik those files are generated by some magic crawlers: https://github.com/jenkinsci/backend-crawler and pushed those json files into http://mirrors.jenkins-ci.org/updates/updates/ or any other mirrors. But I don't know when those crawers are launched.

Cheers