https://community.cloudera.com/t5/Support-Questions/Tez-view-issue-404-not-connecting-to-YARN-timeline/m-p/173605#M135871 <P><A rel="user" href="https://community.cloudera.com/users/15228/mcasuvaraj.html" nodeid="15228">@Uvaraj Seerangan</A></P><P>As you are getting the error as :</P><PRE> "trace": "{\"exception\":\"NotFoundException\",\"message\":\"java.lang.Exception: Timeline entity { id: tez_application_1490359925913_0002, type: TEZ_APPLICATION } is not found\",\"javaClassName\":\"org.apache.hadoop.yarn.webapp.NotFoundException\"}", "message": "Failed to fetch results by the proxy from url: http://localhost:8188/ws/v1/timeline/TEZ_APPLICATION/tez_application_1490359925913_0002?_=1490365592944&amp;user.name=admin", </PRE><P>So please first check if your "tez-site.xml" file has the following property set properly ?</P><PRE>tez.am.view-acls=*</PRE><P> Also check if disabling the ACL at Yarn config works for you? Because in your error we see "user.name=admin" so either add the admin user to the yarn acl or disable the acl for the moment and then try again.</P><PRE>yarn.admin.acl = yarn,dr.who,admin yarn.acl.enable=false</PRE><P>.</P> Fri, 24 Mar 2017 22:58:33 GMT jsensharma 2017-03-24T22:58:33Z