Github user alopresto commented on the issue:
https://github.com/apache/nifi/pull/2044
I also considered passing a supplier rather than the master key to the
`KeyProviderFactory`, but the `EncryptedWriteAheadProvenanceRepository` already
has access to the master key retrieval code, so I didn't yet.
I also considered making a DTO for the `KeyProvider` configuration values
used in the factory, as the parameter list is getting a little long, but the
only place they are currently used is in the EWAPR. When I implement NIFI-3888
subtasks for content and flowfile repository, I may refactor this to be more
concise.
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