https://community.cloudera.com/t5/Support-Questions/Not-able-to-connect-to-Cloudera-Manager-Web-UI/m-p/281023#M209107 <P>Regular exception is observed in CM server logs :</P><P>&nbsp;</P><P>&nbsp;</P><LI-CODE lang="markup">2019-10-20 17:32:34,687 ERROR ParcelUpdateService:com.cloudera.parcel.components.ParcelDownloaderImpl: (11 skipped) Unable to retrieve remote parcel repository manifest java.util.concurrent.ExecutionException: java.net.ConnectException: connection timed out: archive.cloudera.com/151.101.188.167:443</LI-CODE><P>&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P><P>This may happen if you have http_proxy to access public web or you have private network.</P><P>Currently CM is trying to access the archive url to download parcels as this was the method used while instaling CM and failing to do so.</P><P>Try running below command on CM node and let us know the output :</P><P><FONT face="courier new,courier,monospace" size="4"><STRONG>wget <A href="https://archive.cloudera.com/cdh6/6.3.1/parcels/manifest.json" target="_blank">https://archive.cloudera.com/cdh6/6.3.1/parcels/manifest.json</A></STRONG></FONT></P><P>&nbsp;</P><P>&nbsp;</P><P><BR />If you want to set proxy can be done under Administration &gt; Search for 'Proxy'&nbsp;</P> Tue, 22 Oct 2019 16:44:58 GMT ssulav 2019-10-22T16:44:58Z