Details
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Bug
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Status: Resolved (View Workflow)
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Minor
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Resolution: Fixed
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None
Description
Follow-up to JENKINS-43492
We need to ensure that all packages ship Java 8 if they do embed it. From what I see, at least some tests (e.g. openSuse) run with Java 7 and hence will probably become unstable. Windows installer definitely bundles Java, we need to ensure the version is correct (Java 8 latest, 32 bit)
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millda4 Make sure your Jenkins version uses the same JDK. By default the windows installer uses the bundled version. As mindeb mentioned above (bullet #2), you can check it in the Windows Service Wrapper config file (jenkins.xml)
Mindaugas Batutis
added a comment - I just had this issue and solved it by:
- Creating JAVA_HOME environment variable to point to Java 8 directory, i.e. C:\Program Files (x86)\Java\jre1.8.0_111\bin
- Editing C:\Program Files (x86)\Jenkins\jenkins.xml line <executable>...</executable> to <executable>%JAVA_HOME%\java</executable>
- Opening command line in C:\Program Files (x86)\Jenkins and running "jenkins stop", "jenkins uninstall", "jenkins install", "jenkins start".
I also deleted the jre folder from Jenkins directory just to be sure. Hope this helps until the above issue is resolved.
Mindaugas Batutis
added a comment - I just had this issue and solved it by:
Creating JAVA_HOME environment variable to point to Java 8 directory, i.e. C:\Program Files (x86)\Java\jre1.8.0_111\bin
Editing C:\Program Files (x86)\Jenkins\jenkins.xml line <executable>...</executable> to <executable>%JAVA_HOME%\java</executable>
Opening command line in C:\Program Files (x86)\Jenkins and running "jenkins stop", "jenkins uninstall", "jenkins install", "jenkins start".
I also deleted the jre folder from Jenkins directory just to be sure. Hope this helps until the above issue is resolved. 
Dave Miller
added a comment - When I try to install the new version 2.55, I get the same 503 "Service Unavailable" error that I received when trying to install version 2.54. I have to revert back to 2.53 to get Jenkins to work. The server where Jenkins is installed has Java 8 on it.
C:\>java -version
java version "1.8.0_74"
Java(TM) SE Runtime Environment (build 1.8.0_74-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)
Jenkins was installed by somebody else who is no longer with our company, so I "inherited" the setup. It was installed as a service that gets automatically started every time that server is rebooted. From the jenkins.err.log file, I see:
Caused by: java.lang.UnsupportedClassVersionError: jenkins/util/SystemProperties : Unsupported major.minor version 52.0
Am I missing something here? What is going wrong? I thought version 2.55 was created to solve the problem of Jenkins using its own internal version of Java 7 instead of the server's Java 8 version.
Dave Miller
added a comment - When I try to install the new version 2.55, I get the same 503 "Service Unavailable" error that I received when trying to install version 2.54. I have to revert back to 2.53 to get Jenkins to work. The server where Jenkins is installed has Java 8 on it.
C:\>java -version
java version "1.8.0_74"
Java(TM) SE Runtime Environment (build 1.8.0_74-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)
Jenkins was installed by somebody else who is no longer with our company, so I "inherited" the setup. It was installed as a service that gets automatically started every time that server is rebooted. From the jenkins.err.log file, I see:
Caused by: java.lang.UnsupportedClassVersionError: jenkins/util/SystemProperties : Unsupported major.minor version 52.0
Am I missing something here? What is going wrong? I thought version 2.55 was created to solve the problem of Jenkins using its own internal version of Java 7 instead of the server's Java 8 version.
It was resolved at some point. The next step for Platform SIG is to get rid of Java bundling in the installer at all. slide_o_mix is working on it afaik