Zsihovszki Krisztina created NIFI-12531:
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Summary: Parameter references are removed after property migration
Key: NIFI-12531
URL: https://issues.apache.org/jira/browse/NIFI-12531
Project: Apache NiFi
Issue Type: Bug
Reporter: Zsihovszki Krisztina
Assignee: Zsihovszki Krisztina
Parameter references disappear from the properties when a flow is imported to
NiFi 2.0.
The problem was observed for InvokeHTTP processor when e.g. we extract "Host
URL" property to a parameter. The flow definition contains the parameter
reference properly:
{code:java}
"HTTP URL": "#{Server URL}",{code}
but the property value is resolved in the imported flow and the connection
between the parameter ("Server URL") and the processor is lost.
The issue did not occur for other processors like ConvertRecord and it occurs
in NiFi 2.0 only.
Based on my investigation the root cause seems to be related to the property
migration.
During the property migration the raw values("#\{Server URL}") are resolved to
effective values (e.g. http://host:port).
In StandardProcessorNode.migrateProperties() the properties are overwritten (
overwriteProperties) if the propertyConfig is modified.
At this step the effective properties are used while I belive the raw
properties should have been used.
Another observed minor issue:
In InvokeHTTP processor, the "Connection Timeout" is renamed to the same name
(that triggered the above mentioned issue since it looked as if the processor
properties were modified, property overwrite was needed)
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