hudson.util.IOException2: Failed to download from

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Check if you don't have a VPN or something like this messing with your connection. Also, check Jenkins DNS configurations (try to start it with "--dns 8.8.8.8".

Solutions on the web

via Google Groups by ch...@orr.me.uk (JIRA), 11 months ago
via jenkins-ci.org by Unknown author, 1 year ago
via Jenkins JIRA by Andreas Pelzer, 1 year ago
Failed to download from http://updates.jenkins-ci.org/download/plugins/gerrit-trigger/2.18.2/gerrit-trigger.hpi
via Jenkins JIRA by Andreas Pelzer, 1 year ago
Failed to download from http://updates.jenkins-ci.org/download/plugins/gerrit-trigger/2.18.2/gerrit-trigger.hpi
hudson.util.IOException2: Failed to download from
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.(HttpClient.java:432)
at sun.net.(HttpClient.java:527)
at sun.net.(HttpClient.java:211)
at sun.net.(HttpClient.java:308)
at sun.net.(HttpClient.java:326)
at sun.net.(HttpURLConnection.java:1167)
at sun.net.(HttpURLConnection.java:1103)
at sun.net.(HttpURLConnection.java:997)
at sun.net.(HttpURLConnection.java:931)
at sun.net.(HttpURLConnection.java:1511)
at sun.net.(HttpURLConnection.java:1439)
at sun.net.(HttpURLConnection.java:2929)
at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
at java.net.URLConnection.getContentLength(URLConnection.java:485)
at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:755)
at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1138)
at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1298)
at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1116)
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:104)
at java.lang.Thread.run(Thread.java:745)

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