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Posted to issues@nifi.apache.org by "Mark Payne (Jira)" <ji...@apache.org> on 2023/10/13 14:56:00 UTC

[jira] [Created] (NIFI-12228) Concurrency bug can occasionally lead to allowing a group with Single FlowFile per Node input pulling in multiple FlowFiles

Mark Payne created NIFI-12228:
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             Summary: Concurrency bug can occasionally lead to allowing a group with Single FlowFile per Node input pulling in multiple FlowFiles
                 Key: NIFI-12228
                 URL: https://issues.apache.org/jira/browse/NIFI-12228
             Project: Apache NiFi
          Issue Type: Bug
            Reporter: Mark Payne
            Assignee: Mark Payne
             Fix For: 1.latest, 2.latest


Every now and then we see a failure in the system tests:
{code:java}
BatchFlowBetweenGroupsIT.testSingleConcurrencyAndBatchOutputToBatchInputOutput » Timeout testSingleConcurrencyAndBatchOutputToBatchInputOutput() timed out after 5 minutes {code}
Looking at the logs shows that this is happening because data enters Group A, and then before the Output Port has a chance to push the data out of Group A, a second FlowFile enters. As a result, the test fails because the queue between Groups A and B, or the connection inside of Group B, never reach the expected size.



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