David Handermann created NIFI-15693:
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Summary: Flow Synchronization Fails with empty File User Groups
Key: NIFI-15693
URL: https://issues.apache.org/jira/browse/NIFI-15693
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework, Security
Affects Versions: 2.7.2, 2.7.1, 2.8.0, 2.7.0
Reporter: David Handermann
Assignee: David Handermann
Following recent refactoring of the {{FileUserGroupProvider}} to use DOM
instead of JAXB for parsing XML files, flow synchronization between cluster
nodes can fail when the users.xml configuration is empty.
On initial load, the AuthorizedUserGroups record object contains empty
immutable Lists of users and groups when the local users.xml configuration is
empty. The synchronization process calls {{forciblyInheritFingerprint}} on
{{FileUserGroupProvider}} which can result in a
{{FlowSynchronizationException}} caused by an {{UnsupportedOperationException}}
on the empty immutable Lists in memory.
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