Brandon DeVries created NIFI-5713:
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Summary: MergeContent improperly changing mime.type
Key: NIFI-5713
URL: https://issues.apache.org/jira/browse/NIFI-5713
Project: Apache NiFi
Issue Type: Bug
Affects Versions: 1.7.1
Reporter: Brandon DeVries
MergeContent in "Binary Concatenation" mode will replace an existing
"mime.type" attribute with "application/octet-stream" unless mime.type is set
on the first FlowFile merged, even if "Attribute Strategy" is "Keep All Unique
Attributes". Perhaps rather than pulling the mime.type from the "merger"[2],
it should check the "bundleAttributes"[3] first. if no mime.type is specified
there, then perhaps "octet-stream" is a good default.
Additionally, regardless of whatever implementation choices are made in the
determination of the mime.type, the "WritesAttribute" documentation should be
updated to indicate that mime.type is being set...
[1]
[https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java#L621-L629]
[2]
[https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java#L502]
[2]
[https://github.com/apache/nifi/blob/ea9b0db2f620526c8dd0db595cf8b44c3ef835be/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/MergeContent.java#L501]
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