My cluster installed using ambari has two datanodes. One of them failed to
install nodemanager due to error:

resource_management.core.exceptions.Fail: Cannot match package for
regexp name hadoop_${stack_version}-yarn.

# for kafka broker which can be installed successfully, I see:

yum list installed | grep kafka
*@HDP-2.6-repo-1 *

# for nodemanager which fail to install, I see:

yum list installed | grep yarn

I guess yarn is associated with wrong repo. How can I fix this?
Appreciate any help!

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