Hello @ryu    As mentioned by @arunek95, we assume Phoenix is enabled for the Cluster. If not, Kindly enable Phoenix & try the Command again.    The Logging indicates HDP v2.6.1.0 with Phoenix v4.7. The Directory "/usr/lib/phoenix/" has the Phoenix Client & you mentioned the same Directory has Phoenix Server Jar as well. Kindly verify if the Permission on the JAR is Correct & confirm via "jar -tvf" on the Phoenix Server Jar that the Class "MetaDataEndpointImpl" is included in the same.    The Error indicates the Phoenix creating the SYSTEM Tables (Upon 1st Connection to Phoenix) is encountering the Error. In our Internal Setup, We see the Phoenix-Server Jar is present in HBase Lib Path as well, pointing to the Phoenix-Server Jar in Phoenix Lib Path as SymLink: /usr/hdp/<Version>/hbase/lib/phoenix-server.jar -> /usr/hdp/<Version>/phoenix/phoenix-server.jar   Kindly ensure the Phoenix Server JAR is present in HBase Lib Directory as well. Additionally, Review the Master Logs to check for the Error Message at HBase Level as well.    - Smarak ... View more

Hello @gurucgi    This is an Old Post yet we wish to check if the issue has been addressed by you. If Yes, Please share the Steps to ensure fellow Community Users can benefit from your experience.    Based on the Post, SystemCatalogRegionObserver is being reported for Class not being loaded. The concerned Error is being received for Phoenix v5.1.1. In Cloudera, We are shipping with Phoenix v5.1.0 at the time of writing. I am not sure if you are being impacted via [1]. In short, the JAR seems to be requiring the Phoenix-Server Jar to be placed rightfully.    - Smarak   [1] https://issues.apache.org/jira/browse/PHOENIX-6330   ... View more