There are 0 datanode(s) running and no node(s) are excluded in this operation

Question

I have set up a multi node Hadoop Cluster. The NameNode and Secondary namenode runs on the same machine and the cluster has only one Datanode. All the nodes are configured o

Answer 1

Have you tried clearing the /tmp folder.

Before cleanup a datanode did not come up

86528 SecondaryNameNode
87719 Jps
86198 NameNode
78968 RunJar
79515 RunJar
63964 RunNiFi
63981 NiFi

After cleanup

sudo rm -rf /tmp/*

It worked for me

89200 Jps
88859 DataNode