Thank you Aaron, will go through the document accordingly. Regards, Kamaraj
From: Aaron Grubb<mailto:aa...@kaden.ai> Sent: Saturday, August 22, 2020 12:17 AM To: Muthupandiyan, Kamaraj<mailto:kamaraj.muthupandi...@hpe.com>; user@hadoop.apache.org<mailto:user@hadoop.apache.org> Subject: RE: setting up Load balancer for name nodes It is important to always read documents for your version as documentation for other version will not specify which versions contain the feature being documented. https://hadoop.apache.org/docs/r2.9.2/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html<https://hadoop.apache.org/docs/r2.9.2/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html> From: Muthupandiyan, Kamaraj <kamaraj.muthupandi...@hpe.com> Sent: Friday, August 21, 2020 10:05 AM To: user@hadoop.apache.org Subject: setting up Load balancer for name nodes Hello team, I need to configure LB for our name node setup and we are using Hadoop 2.9.2 . I was going through the docs from https://hadoop.apache.org/docs/r3.3.0/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html<https://hadoop.apache.org/docs/r3.3.0/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html> and found the below option, but whenever I am using the HTTP endpoints as mentioned below I am getting 404 response If you are running a set of NameNodes behind a Load Balancer (e.g. Azure<https://docs.microsoft.com/en-us/azure/load-balancer/load-balancer-custom-probe-overview> or AWS<https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-healthchecks.html> ) and would like the Load Balancer to point to the active NN, you can use the /isActive HTTP endpoint as a health probe. http://NN_HOSTNAME/isActive<http://nn_hostname/isActive> will return a 200 status code response if the NN is in Active HA State, 405 otherwise. Regards, Kamaraj
