Tag restrictions - Amazon EMR
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Tag restrictions

The following basic restrictions apply to tags:

  • Restrictions that apply to Amazon EC2 resources apply to Amazon EMR as well. For more information, see https://docs.amazonaws.cn/AWSEC2/latest/UserGuide/Using_Tags.html#tag-restrictions.

  • Do not use the aws: prefix in tag names and values because it is reserved for Amazon use. In addition, you cannot edit or delete tag names or values with this prefix.

  • You cannot change or edit tags on a terminated cluster.

  • A tag value can be an empty string, but not null. In addition, a tag key cannot be an empty string.

  • Keys and values can contain any alphabetic character in any language, any numeric character, white spaces, invisible separators, and the following symbols: _ . : / = + - @

For more information about tagging using the Amazon Web Services Management Console, see Working with tags in the console in the Amazon EC2 User Guide for Linux Instances. For more information about tagging using the Amazon EC2API or command line, see API and CLI overview in the Amazon EC2 User Guide for Linux Instances.