Hi @satvaddi , If you are running in a Ranger RAZ enabled environment you don't need all these settings: > --conf "spark.hadoop.hadoop.security.authentication=KERBEROS" \ > --conf "spark.hadoop.hadoop.security.authorization=true" \ > --conf "spark.hadoop.fs.s3a.delegation.token.binding=org.apache.knox.gateway.cloud.idbroker.s3a.IDBDelegationTokenBinding" \ > --conf "spark.hadoop.fs.s3a.idb.auth.token.enabled=true" \ > --conf "spark.hadoop.fs.s3a.aws.credentials.provider=org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider" \ > --conf "spark.hadoop.fs.s3a.security.credential.provider.path=jceks://hdfs/user/infa/knox_credentials.jceks" \ > --conf "spark.hadoop.fs.s3a.endpoint=s3.amazonaws.com" \ > --conf "spark.hadoop.fs.s3a.impl=org.apache.hadoop.fs.s3a.S3AFileSystem" \   To me it looks like you are bypassing Raz by setting this parameter: > --conf "spark.hadoop.fs.s3a.aws.credentials.provider=org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider" \   This, I would check whether the instance profile (IAM Role attached to the cluster) does not have too much privileges. Like access to data. This should be controlled in Ranger instead. ... View more

@hadoopranger  Consider tuning parameters like idle_session_timeout and idle_query_timeout which is suspected to be closing the session considering you don't have LB in place. You can also set it to 0 where session will never expire until closed manually. Moreover, consider increasing value of fe_service_threads to allow more concurrent client connections which should help you avoiding similar client connection issue in future. For more info, refer: https://docs.cloudera.com/cdp-private-cloud-base/7.1.9/impala-reference/topics/impala-recommended-configs.html ... View more

  @satz The image is the result of the last check step, which is to connect to localhost:7180 and add the cluster after installing the OS using the commands on the trial install page. In this situation, the status of the cluster shows that namenode is down. After that, no matter how many times you refresh the page or restart through the command in the OS, you will get the access denied (page cannot be opened) message when you connect to the CM. Also, I install it on one OS and proceed, but sometimes, during the process of adding a cluster, only the OS installed at the time of host inspection is installed in the cluster, and the rest of the OSs are removed. (Sometimes I can completely reinstall the OSs afterward, and sometimes I can't, but I don't know the difference. The log is so long that I want to upload the file, but there is no upload function. ... View more

Hi @evanle96  This error is not an issue. Usually in the HA setup the call goes to both the NN and the Active NN acknowledges the call but the standby NN will through this warning. So you can ignore this warning here. ... View more