Hashes together the key/value pairs of several FlowFile Attributes and adds the hash as a new attribute. Optional properties are to be added such that the name of the property is the name of a FlowFile Attribute to consider and the value of the property is a regular expression that, if matched by the attribute value, will cause that attribute to be used as part of the hash. If the regular expression contains a capturing group, only the value of the capturing group will be used.


attributes, hash


In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values.

Name Default Value Allowable Values Description
Hash Value Attribute Key The name of the FlowFile Attribute where the hash value should be stored

Dynamic Properties:

Dynamic Properties allow the user to specify both the name and value of a property.

Name Value Description
A flowfile attribute key for attribute inspection A Regular Expression This regular expression is evaluated against the flowfile attribute values. If the regular expression contains a capturing group, the value of that group will be used when comparing flow file attributes. Otherwise, the original flow file attribute's value will be used if and only if the value matches the given regular expression.


Name Description
failure Used for FlowFiles that are missing required attributes
success Used for FlowFiles that have a hash value added

Reads Attributes:

None specified.

Writes Attributes:

Name Description
<Hash Value Attribute Key> This Processor adds an attribute whose value is the result of Hashing the existing FlowFile attributes. The name of this attribute is specified by the <Hash Value Attribute Key> property.