Does the laster version of docker plugin requires java 1.7 ?

[ycollet]

Hello,

Today, I found my installation of jenkins hanged.
This was due to the docker plugin. In the log of jenkins, I found this message:

15 juin 2015 08:32:03 jenkins.InitReactorRunner$1 onTaskFailed
GRAVE: Failed Loading plugin docker-plugin
java.io.IOException: Unable to load com.nirima.jenkins.plugins.docker.PluginImpl from docker-plugin
        at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:422)
        at hudson.PluginManager$2$1$1.run(PluginManager.java:370)
        at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
        at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
        at jenkins.model.Jenkins$7.runTask(Jenkins.java:904)
        at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
        at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:701)
Caused by: java.lang.UnsupportedClassVersionError: com/nirima/jenkins/plugins/docker/PluginImpl : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
        at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1138)
        at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:799)
        at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1309)
        at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1365)
        at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1325)
        at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1078)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
        at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:415)
        ... 9 more
15 juin 2015 08:32:03 hudson.plugins.greenballs.PluginImpl start
INFO: Green Balls!


Does the docker plugin requires java 1.7 ?

Best regards,

YC

[Suckow, Thomas J]

> Does the docker plugin requires java 1.7 ?

Yes

[Christopher Orr]

On 16/06/15 17:06, Suckow, Thomas J wrote:
>
>> Does the docker plugin requires java 1.7 ?
>
> Yes

The minimum Jenkins requirement probably should have been bumped to
1.612 (the first release to require Java 7), or at least there should
have been a warning in the changelog I guess.

Regards,
Chris