Mark Payne created NIFI-9910:
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             Summary: CSVRecordLookupService assumes key is a String
                 Key: NIFI-9910
                 URL: https://issues.apache.org/jira/browse/NIFI-9910
             Project: Apache NiFi
          Issue Type: Bug
          Components: Extensions
            Reporter: Mark Payne
            Assignee: Mark Payne


The CSVRecordLookupService assumes that the provided key is a String and 
attempts to cast the value to a String. If an integer, for example, is 
provided, it throws a ClassCastException.

SimpleCsvFileLookupService, on the other hand, more appropriately calls 
{{toString()}} to convert the value into a String. We should do this always.



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