Hadoop hosts with different OS version is not recommended because higher OS version might come up with higher JAVA version hence that can cause inconsistencies. Due to this either you can see either performance improvement or performance degradation on both java and OS level. Because all hadoop processes are isolated in JVM env.  But still we can run a cluster with different OS versions but make sure the OS is supported. https://docs.cloudera.com/documentation/enterprise/6/release-notes/topics/rg_os_requirements.html#os_requirements   Make sure to mark the answer as the accepted solution. If it resolves your issue ! ... View more