In the issue: https://issues.apache.org/jira/browse/YARN-9898 we have added a workaround using an non-official released netty-4.1.48 to fix the ARM support issue. but just a few hours agon, Netty has release the 4.1.50 version which is officially support ARM platform, please see: https://github.com/netty/netty/pull/9804
netty-4.1.50.Final release: https://github.com/netty/netty/releases/tag/netty-4.1.50.Final
commits from netty-4.1.48 to netty-4.1.50: https://github.com/netty/netty/compare/netty-4.1.48.Final...netty-4.1.50.Final
So, now it is better to upgrade the netty-dependency version of Hadoop to 4.1.50 version.