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The hiera_hash function fails with type error when a key is empty (or wrong type), which makes sense but the error message doesn't provide much information to help debug the issue:
Error: Could not run: Hiera type mismatch: expected Hash and got NilClass
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It would be nice if it contained:
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Where in puppet manifest was hiera_hash function called from (file name + line number)
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Where in hiera is the offending key stored (file name + line number)
Here is an example to reproduce the issue:
#-- Assuming hiera.yaml
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:hierarchy:
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- web01.example.com
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- common
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#-- Assuming common.yaml:
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users:
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regular:
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'cdouglas': 'Carrie Douglas'
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#-- Assuming web01.example.com.yaml:
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users:
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# administrators:
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# 'aberry': 'Amy Berry'
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The case where I saw this happen is when user hashed out a bunch of values but left the top level key as illustrated above. Took a while to hunt it down in the hierarchy and wasn't immediately obvious what happened.
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