java.net.SocketTimeoutException: connect timed out at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at sun.net.NetworkClient.doConnect(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.<init>(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source) at java.net.URLConnection.getHeaderFieldLong(Unknown Source) at java.net.URLConnection.getContentLengthLong(Unknown Source) at java.net.URLConnection.getContentLength(Unknown Source) at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1126) Caused: java.net.SocketTimeoutException: connect timed out at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1139) Caused: java.io.IOException: Failed to load http://updates.jenkins-ci.org/download/plugins/script-security/1.43/script-security.hpi to C:\Users\Administrator.LG-20171104SUTB\.jenkins\plugins\script-security.jpi.tmp at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1146) Caused: hudson.util.IOException2: Failed to download from http://updates.jenkins-ci.org/download/plugins/script-security/1.43/script-security.hpi at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:1172) at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1677) at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1874) at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1651) at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:112) at java.lang.Thread.run(Unknown Source)