I am getting the similar issue as described below. After setting up the proxy, I am able to validate the proxy (Success) but still when i click on "check now" button in update/available tab, getting below error. I never saw this kind of error in version 1.6. java.io.FileNotFoundException: http://updates.jenkins-ci.org/update-center.json?id=default&version=*2.51* at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at hudson.model.DownloadService.loadJSON(DownloadService.java:171) at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:190) at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1629) |