https://community.cloudera.com/t5/Support-Questions/YARN-issues-critical-error-quot-ATSv2-HBase-Application-quot/m-p/234657#M196477 <A rel="user" href="https://community.cloudera.com/users/97375/kubalievzh.html" nodeid="97375">@Zholaman Kubaliyev</A><P>Can you please check if the following "<STRONG>status</STRONG>" command is giving you proper output?<BR /></P><PRE># su - yarn-ats -c "/usr/hdp/current/hadoop-yarn-client/bin/yarn app -status ats-hbase"</PRE><P><BR />If "ats-hbase" service is down the you might see the error. Because the failing alert will also run the same query and then will attempt to parse the JSON output so if the status is not returning fine they you should see the alert.<BR /><BR />Please check if your "ats-hbase" service is running?<BR /><BR /><STRONG>Reference: </STRONG><BR /><A href="https://docs.hortonworks.com/HDPDocuments/HDP3/HDP-3.0.1/data-operating-system/content/options_to_restart_ats-hbase.html" target="_blank">https://docs.hortonworks.com/HDPDocuments/HDP3/HDP-3.0.1/data-operating-system/content/options_to_restart_ats-hbase.html</A><BR /><BR /><A href="https://docs.hortonworks.com/HDPDocuments/HDP3/HDP-3.0.1/data-operating-system/content/enable_system_service_mode.html" target="_blank">https://docs.hortonworks.com/HDPDocuments/HDP3/HDP-3.0.1/data-operating-system/content/enable_system_service_mode.html</A></P> Thu, 25 Oct 2018 12:39:08 GMT jsensharma 2018-10-25T12:39:08Z