INFO: The attempt #1 to do the action check updates server failed with an allowed exception:
java.net.SocketTimeoutException: connect timed out
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
 at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
 at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
 at java.net.Socket.connect(Socket.java:589)
 at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
 at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
 at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
 at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
 at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
 at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
 at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162)
 at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
 at hudson.model.DownloadService.loadJSON(DownloadService.java:167)
 at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:189)
 at hudson.PluginManager.checkUpdatesServer(PluginManager.java:1766)
 at hudson.util.Retrier.start(Retrier.java:62)
 at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1737)
 at jenkins.model.DownloadSettings$DailyCheck.execute(DownloadSettings.java:130)
 at hudson.model.AsyncPeriodicWork$1.run(AsyncPeriodicWork.java:101)
 at java.lang.Thread.run(Thread.java:748)
Aug 28, 2019 7:13:54 PM hudson.util.Retrier start
INFO: Calling the listener of the allowed exception 'connect timed out' at the attempt #1 to do the action check updates server
Aug 28, 2019 7:13:54 PM hudson.util.Retrier start
INFO: Attempted the action check updates server for 1 time(s) with no success
Aug 28, 2019 7:13:54 PM hudson.PluginManager doCheckUpdatesServer
SEVERE: Error checking update sites for 1 attempt(s). Last exception was: SocketTimeoutException: connect timed out
Aug 28, 2019 7:13:54 PM hudson.model.AsyncPeriodicWork$1 run