Hello @Suyog1981 ,   thank you for reaching out to Community. I understand that your issue is: After upgrading from CDH5.12 to CDH6.3.3. MR2 job that is connecting to HBase is failing and it seems to be that the runtime is still pointing to CDH5.12.   Can you please check if any of the links under /etc/alternatives or /var/lib/alternatives is still pointing to CDH5.12 paths on the node where the container of the MR job is failing? E.g. use: grep CDH-5.12 * | awk -F ':' '{print $1}'   Thank you: Ferenc ... View more