@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

Thanks. I guess it is not for total_io_mb but for "memory and v-core utilization". Disk io should be in yarn logs. I will try seek it. ... 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

Unfortunately, it is not possible to change the Application-Name of an already started Application Master in Apache Hadoop YARN. The Application-Name is set when the application is submitted and cannot be modified during runtime. The Application-Name is typically specified as a parameter when submitting the application using the spark-submit command or the YARN REST API. Once the application is started, the Application-Name is fixed and cannot be changed. If you need to change the Application-Name, you will need to stop the existing application and submit a new one with the desired name. ... View more

@hadoopranger I am circling back on this. Did you try the steps shared in my previous reply? If yes, let us know how did it go.  If you find my reply helpful, You may mark  it as the accepted solution. You can also say thanks by clicking on the thumbs up button.   V ... View more

Hi @husseljo , Please mark this "Accept as solution" if you find my answer helped you. ... View more

So do you mean that there is no need of migration, just bring up the new server, assign required roles and then decomm the old one?  ... View more

Thank you for the response. But its my old post and I was able to get Yarn QM working then. ... View more

Hi @Muba  Please check if the Hue user user1 is not part of HDFS superuser group. This might give the user access to file browser and all the hdfs directories. ... View more