JDK Installer Not Showing Dropdown List

Issue

JDK Installer for java.sun.com displays a text field instead of a dropdown list
Cannot use JDK Installer

Environment

CloudBees Jenkins Enterprise

Root cause

This is a problems of the basic function of the update center. The update center does not fetch the latest data file for the JDK Installer.

Resolution

This can be fixed inside a running instance of CJE.

Delete the failing JDK installers

Got to Manage Jenkins/Configure System
Remove the JDK installer image::common-kb::jdkinstaller-conf-dropdown.png[image-1.png]

Force Jenkins to update the JDK Installer data file:

Go to Manage Jenkins/Script Console

Copy/Paste and Run this groovy script that will update the data file for tools and installers:

  hudson.model.DownloadService.signatureCheck = false
  hudson.model.DownloadService.Downloadable.get("hudson.tools.JDKInstaller").updateNow()
  hudson.model.DownloadService.signatureCheck = true
  return

The script might take few seconds to finish. A label Result appears below the Text Area indicating that the script has run. image::common-kb::jdkinstaller-conf-no-dropdown.png[image-2.png]

This line should appears in the log as well:
```
 ...
 INFO: Obtained the updated data file for hudson.tools.JDKInstaller
 ...
```
Go to Manage Jenkins/Configure System
Add a JDK Installation and select the java.sun.com JDK Installer. There should be a dropdown list. image::common-kb::jdkinstaller-script-result.png[image-3.png]