[jira] [Created] (NIFI-4817) GetFile is missing a context.yield when using "Polling Interval", causing it to spin

["Joseph Percivall (JIRA)" <ji...@apache.org>]

Joseph Percivall created NIFI-4817:
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             Summary: GetFile is missing a context.yield when using "Polling Interval", causing it to spin
                 Key: NIFI-4817
                 URL: https://issues.apache.org/jira/browse/NIFI-4817
             Project: Apache NiFi
          Issue Type: Bug
            Reporter: Joseph Percivall


The "Polling Interval" property is used so that the listing of the directory isn't done on every onTrigger of the processor. The actual check is here[1]. In the event, the fileQueue is empty and it's not yet time to list the directory again, the processor returns here[2]. Since there isn't a context.yield before the return, the processor (assuming the default scheduling period of '0 sec') will immediately attempt to do the same thing. Causing the processor to spin and take up as many concurrent tasks as it's allowed.

A "context.yield" should be added before the return so that the processor doesn't just spin between listings.

 

[1] https://github.com/apache/nifi/blob/7f5eabd603bfc326dadc35590bbe69304e8c90fa/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetFile.java#L372

[2] https://github.com/apache/nifi/blob/7f5eabd603bfc326dadc35590bbe69304e8c90fa/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetFile.java#L406



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