Getting Warning while installing hiera-eyaml gem

[tchanna]

While I am trying to install hiera-eyaml gem, it is giving me the below Warning, though it installs fine.

# /opt/puppetlabs/bin/puppetserver gem install --local hiera-eyaml-3.2.0.gem
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/opt/puppetlabs/server/apps/puppetserver/puppet-server-release.jar) to field java.io.FileDescriptor.fd
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Successfully installed hiera-eyaml-3.2.0
1 gem installed

[kenyon]

This warning seems to happen for any puppetserver command. https://tickets.puppetlabs.com/browse/SERVER-2761