question Why does Standby Namenode read from Journals Nodes when Datanodes already send block report to it? in Support Questions

question Why does Standby Namenode read from Journals Nodes when Datanodes already send block report to it? in Support Questions https://community.cloudera.com/t5/Support-Questions/Why-does-Standby-Namenode-read-from-Journals-Nodes-when/m-p/240762#M202566 Hi, As per my knowledge (please correct me if I am wrong), the Datanodes sends the block report to both Active and Standby Namenodes. The job of Active NN is to write to the Journal Nodes and the job of Standby namenode is to read from Journal nodes. Now why does Standby namenode need to read from Journal nodes when the Datanodes (slaves) are already sending the block reports to it? Wed, 22 May 2019 03:19:20 GMT sheshk11 2019-05-22T03:19:20Z