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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".

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via Arqade by user3583166
, 1 year ago
libraries.minecraft.net
java.net.UnknownHostException: libraries.minecraft.net 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.security.ssl.SSLSocketImpl.connect(Unknown Source) at sun.security.ssl.BaseSSLSocketImpl.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.protocol.https.HttpsClient.<init>(Unknown Source) at sun.net.www.protocol.https.HttpsClient.New(Unknown Source) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at java.net.HttpURLConnection.getResponseCode(Unknown Source) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source) at net.technicpack.launchercore.mirror.download.Download.run(Download.java:71) at net.technicpack.launchercore.mirror.MirrorStore.downloadFile(MirrorStore.java:117) at net.technicpack.launchercore.install.tasks.DownloadFileTask.runTask(DownloadFileTask.java:55) at net.technicpack.launchercore.install.tasks.TaskGroup.runTask(TaskGroup.java:64) at net.technicpack.launchercore.install.InstallTasksQueue.runAllTasks(InstallTasksQueue.java:51) at net.technicpack.launchercore.install.ModpackInstaller.installPack(ModpackInstaller.java:53) at net.technicpack.launcher.launch.Installer$1.run(Installer.java:110) at java.lang.Thread.run(Unknown Source)