[jira] [Created] (NIFI-9365) Node can fail to offload due to ConcurrentModificationException

["Mark Payne (Jira)" <ji...@apache.org>]

Mark Payne created NIFI-9365:
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             Summary: Node can fail to offload due to ConcurrentModificationException
                 Key: NIFI-9365
                 URL: https://issues.apache.org/jira/browse/NIFI-9365
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
            Reporter: Mark Payne
            Assignee: Mark Payne


I created a System Test that create a cluster, add some processors to the flow, and run the flow. Then disconnect one of the nodes and offload it. When successful, reconnect node, destroy flow, and start over. Repeat for several iterations.

Intention here was to ensure that we successfully complete offloading after trying many times. After several iterations, I encountered a ConcurrentModificationException in StandardProcessorNode#getActiveThreads. This caused the node not to complete its offloading.



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