I had a 5 node HDP cluster running with embedded postgress running. Over the weekend , the server patching activity caused autoreboot on all the 5 nodes and now all the components are down. It would be helpful to know:
1) How can i recover the cluster back to have all the components functioning again ?
2) I tried starting postgress and then start ambari-server manually so that i can resubmit the blueprints if required to reinstall other components but ambari while starting up is throwing the below error(I am using openJDK):
Looking for available JDKs at /usr/jdk64
ERROR: Exiting with exit code 1.
REASON: No JDK found, please run the "ambari-server setup" command to install a JDK automatically or install any JDK manually to /usr/jdk64
3) How do setup the components (HDFS , YARN , Ranger , Zeppelin , HIVE)to autorestart so that we can survive any VM reboots ?