hudson.util.IOException2: Failed to download from http://updates.jenkins-ci.org/download/plugins/join/1.15/join.hpi (redirected to: http://mirror.xmission.com/jenkins/plugins/join/1.15/join.hpi) at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:797) at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1148) at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1309) at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1126) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110) at java.lang.Thread.run(Thread.java:745) Caused by: java.io.IOException: Inconsistent file length: expected 2875560 but only got 6814 at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:784) ... 7 more