@yzydhf  Can you confirm if this is a new installation and you are facing the issue while starting yarn timelineserver for the first time?   From the exception we believe the ambari server runs as sudo user and the commands for the sudo user not set correctly, review the below documentation more information   https://docs.cloudera.com/HDPDocuments/Ambari-2.6.0.0/bk_ambari-security/content/how_to_configure_ambari_server_for_non-root.html   If you are still facing the issue attach below files/logs ambari-server log ambari.properties ... View more

I found a mirror source here, but the dependent packages need to be downloaded one by one. https://repo.hortonworks.com/content/groups/public ... View more