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The HDP 2.1 Release Notes include the following sections:
Product Version: HDP-2.1.5
Unsupported Apache Components
Tech Previews in This Release
Fixed in This Release
Behavioral Changes
Patch Information
Minimum System Requirements
Upgrading From HDP 2.1.3 to HDP 2.1.5
Improvements
Common Vulnerabilities and Exposures
Known Issues
Deprecated Features
Third-party Licenses
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