While adding hosts to cluster in last step I can see below exceptions, is there anything to worry about.
The following failures were observed in checking hostnames. Showing first 1000 failures only…
DNS lookup of host goli003 on host goli004 failed. Expected 192.168.70.91 but got 192.168.70.90.
DNS reverse lookup of IP 192.168.70.91 on host goli004 failed. Expected goli003 but got 192.168.70.91.
Transparent Huge Page Compaction is enabled and can cause significant performance problems. Run “echo never > /sys/kernel/mm/transparent_hugepage/defrag” and “echo never > /sys/kernel/mm/transparent_hugepage/enabled” to disable this, and then add the same command to an init script such as /etc/rc.local so it will be set on system reboot. The following hosts are affected:
There are mismatched versions across the system, which will cause failures. See below for details on which hosts are running what versions of components.
Cloudera supports versions 1.6.0_31 and 1.7.0_55 of Oracle JVM and later. OpenJDK is not supported, and gcj is known to not work. Check the component version table below to identify hosts with unsupported versions of Java.
Java versions are inconsistent across the managed hosts. Check the component version below to identify hosts with inconsistent Java versions.