HDP is a distribution of various components bundled into a product. These components are tested against each other, so the distribution works reliably. Should you upgrade a single component only, you lose these guarantees that your HDP distribution will work. For instance think about API changes, new features or bugs being introduced.
In short: you might able to upgrade a specific component however, it is not recommended because it might break things.
Hope this helps!
Ferenc Erdelyi, Technical Solutions Manager
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