title: Jenkins configuration issue
body: <p>I am facing error while adding JDK 1.8.0_60.</p>
  
  <blockquote>
    <p>A problem occurred while processing the request. Please check our bug
    tracker to see if a similar problem has already been reported. If it
    is already reported, please vote and put a comment on it to let us
    gauge the impact of the problem. If you think this is a new issue,
    please file a new issue. When you file an issue, make sure to add the
    entire stack trace, along with the version of Jenkins and relevant
    plugins. The users list might be also useful in understanding what has
    happened.</p>
  </blockquote>
  
  <p>Stack trace</p>
  
  <pre><code>javax.servlet.ServletException: Failed to parse JSON:init
      at org.kohsuke.stapler.RequestImpl.getSubmittedForm(RequestImpl.java:918)
      at jenkins.model.Jenkins.doConfigSubmit(Jenkins.java:2917)`jdk1.8.0_60`
      at sun.reflect.GeneratedMethodAccessor235.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)
      at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161)
      at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)
      at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:121)
      at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
      at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
      at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
      at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
      at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
      at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494)
      at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
      at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:123)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
      at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:49)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
      at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
      at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
      at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
      at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
      at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474)
      at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
      at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
      at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533)
      at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
      at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
      at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
      at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
      at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
      at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
      at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
      at org.eclipse.jetty.server.Server.handle(Server.java:370)
      at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
      at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)
      at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)
      at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
      at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
      at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
      at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
      at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
      at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
  Caused by: net.sf.json.JSONException: A JSONObject text must begin with '{' at character 1 of init
      at net.sf.json.util.JSONTokener.syntaxError(JSONTokener.java:499)
      at net.sf.json.JSONObject._fromJSONTokener(JSONObject.java:919)
      at net.sf.json.JSONObject._fromString(JSONObject.java:1145)
      at net.sf.json.JSONObject.fromObject(JSONObject.java:162)
      at net.sf.json.JSONObject.fromObject(JSONObject.java:132)
      at org.kohsuke.stapler.RequestImpl.getSubmittedForm(RequestImpl.java:916)
      ... 54 more
  </code></pre>