Different OS version in Hadoop Cluster

[#1]

Hi All,

Would like to clarify if having two different OS version for hadoop cluster is an issue.

Eg. Edgenode (stay on lower OS version) vs Datanode + Masternode(Higher version). This is due to the customised application in the edge node forcing us not able to upgrade the edgenode OS version.

Would appreciate some feedback from the experts here.

[#2]

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...

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