UnsupportedClassVersionError An unexpected error occured caused by exception UnsupportedClassVersionError: DocViewerPlugin : Unsupported major.minor version 51.0

[Muneeb kiani]

i'm using play-1.2.3, i am having exception " @6agjdofnm
Internal Server Error (500) for request GET /

Oops: UnsupportedClassVersionError
An unexpected error occured caused by exception
UnsupportedClassVersionError: DocViewerPlugin : Unsupported
major.minor version 51.0

play.exceptions.UnexpectedException: Unexpected Error
at play.Invoker$Invocation.onException(Invoker.java:232)
at play.Invoker$Invocation.run(Invoker.java:273)
at Invocation.HTTP Request(Play!)
Caused by: java.lang.UnsupportedClassVersionError: DocViewerPlugin :
Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at
play.classloading.ApplicationClassloader.loadApplicationClass(ApplicationClassloader.java:
148)
at
play.classloading.ApplicationClassloader.loadClass(ApplicationClassloader.java:
84)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at
play.plugins.PluginCollection.reloadApplicationPlugins(PluginCollection.java:
141)
at play.Play.start(Play.java:440)
at play.Play.detectChanges(Play.java:599)
at play.Invoker$Invocation.init(Invoker.java:186)
... 1 more"
when i run my application. everything seems to be good, dont know why
this exception occur.

[Nicolas Leroux - committer]

Which jdk version are you using? Can you try a play clean?

[Muneeb kiani]

Thanks Man, Problem has been fixed. i was using jdk-1.7 when i created application. now i'm using jdk-1.6-opensouce. now its working..

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