Github user MikeThomsen commented on the issue: https://github.com/apache/nifi/pull/2113 @JPercivall @mattyb149 Once I changed the code to use `transfer(FlowFile, Relationship)` and not `transfer(List, Relationship)` the error stopped happening.
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Github user MikeThomsen commented on the issue: https://github.com/apache/nifi/pull/2113 @JPercivall @mattyb149 Once I changed the code to use `transfer(FlowFile, Relationship)` and not `transfer(List, Relationship)` the error stopped happening.
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