Failure -
 
java.io.IOException: Failed to dynamically deploy this plugin
    at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1895)
    at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1652)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Failed to install sonar plugin
    at hudson.PluginManager.dynamicLoad(PluginManager.java:873)
    at hudson.PluginManager.dynamicLoad(PluginManager.java:813)
    at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1891)
    ... 5 more
Caused by: java.io.IOException: Unable to load hudson.plugins.sonar.SonarPlugin from sonar
    at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:508)
    at hudson.PluginManager.dynamicLoad(PluginManager.java:864)
    ... 7 more
Caused by: java.lang.UnsupportedClassVersionError: hudson/plugins/sonar/SonarPlugin : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
    at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1139)
    at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:876)
    at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1310)
    at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1363)
    at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1326)
    at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1079)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:501)
    ... 8 more