Github user alopresto commented on the issue:
https://github.com/apache/nifi/pull/1686
I had to make some substantial changes to enable multiple keys for
`StaticKeyProvider`. Please exercise defining multiple keys using the following
format in `nifi.properties` (note the format is
nifi.provenance.repository.encryption.key.**id**.**keyId**):
```
nifi.provenance.repository.debug.frequency=100
nifi.provenance.repository.encryption.key.provider.implementation=org.apache.nifi.provenance.StaticKeyProvider
nifi.provenance.repository.encryption.key.provider.location=
nifi.provenance.repository.encryption.key.id=Key1
nifi.provenance.repository.encryption.key=0123456789ABCDEFFEDCBA98765432100123456789ABCDEFFEDCBA9876543210
nifi.provenance.repository.encryption.key.id.Key2=0000111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFF
```
This should generate a key map of `[Key1:012...210, Key2: 000...FFF]`.
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