Alessandro D'Armiento created NIFI-6674:
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             Summary: Expression language minus operation doesn't check for 
underflow
                 Key: NIFI-6674
                 URL: https://issues.apache.org/jira/browse/NIFI-6674
             Project: Apache NiFi
          Issue Type: Bug
            Reporter: Alessandro D'Armiento
             Fix For: 1.9.2
         Attachments: image-2019-09-14-17-51-41-809.png

To reproduce the bug, create a FF with an attribute equals to Long.MIN, then 
subtract 100 to that attribute in a following UpdateAttribute processor. The 
property will underflow to a positive number without throwing any exception

!image-2019-09-14-17-51-41-809.png!



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