The attached blueprint cannot be deployed, because hadoop-env.sh is not saved by Ambari, because it requires HDFS_CLIENT component on at least one host:
Datanode start fails with:
ExecutionFailed: Execution of 'ambari-sudo.sh su hdfs -l -s /bin/bash -c 'ulimit -c unlimited ; /usr/hdp/126.96.36.199-1634/hadoop/bin/hdfs --config /usr/hdp/188.8.131.52-1634/hadoop/conf --daemon start datanode'' returned 1. ERROR: JAVA_HOME is not set and could not be found.
This appears in output from after-INSTALL hook:
Parameter hadoop_conf_dir is missing or directory does not exist. This is expected if this host does not have any Hadoop components.
Additionally, host groups without HDFS_CLIENT cannot be scaled up.