question ATSv2 HBase Application The HBase application reported a 'FAILED' state. Check took Xs in Support Questions

question ATSv2 HBase Application The HBase application reported a 'FAILED' state. Check took Xs in Support Questions https://community.cloudera.com/t5/Support-Questions/ATSv2-HBase-Application-The-HBase-application-reported-a/m-p/339609#M233132 I have a small cluster running HDP 3.1.5.6091 with Ambari 2.7.5.0 the I inherited The Yarn Timeline service starts but gets a constant critical alert   ATSv2 HBase Application The HBase application reported a 'FAILED' state. Check took 2.261s   The hadoop-yarn-timelinereader.log shows  failed on connection exception: org.apache.hbase.thirdparty.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused:server.name:17020   I added that port (17020) to the firewall on the server in question, restarted the Timeline Service V2.0 Reader service but still getting the same error.   Any suggestions would be appreciated       Thu, 24 Mar 2022 18:51:11 GMT wazzu62 2022-03-24T18:51:11Z