I have a hadoop cluster with 10 datanodes. All are working properly. But if I need to reboot any of my data datanode , after reboot that system not entering into the hadoop cluster(master node not able to identify this new datanode) . Is there any way to include that datanode(previously configured or a new one) into hadoop cluster with out restart the master node.
After restarting any datanode it should automatically register with the namenode again. If this is not happening you might want to upload the datanode logs from the period it started so we can see if its registering.