Jon Kessler created NIFI-5377:
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Summary: StandardNiFiServiceFacade: Recursive method call allows
for infinite loop when a circular reference exists
Key: NIFI-5377
URL: https://issues.apache.org/jira/browse/NIFI-5377
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Affects Versions: 1.7.0
Reporter: Jon Kessler
At a minimum, when you attempt to view a list of controller services in the gui
this specific method is called to obtain a set of referenced controller service
identifiers. If there is a circular dependency in that set, you end up with an
infinite loop that ultimately results the user being redirected to an error
page in the gui.
The method in question is findControllerServiceReferencingComponentIdentifiers.
It checks to see if each node has been visited already but does not add them to
the set until after recursively calling itself again. If the line
"visited.add(node);" is moved above the method call, this will be resolved.
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