Intermittent Failures in TestPutSFTP.testRunZeroByteFile

[ERROR] Tests run: 5, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.456 s <<< FAILURE! - in org.apache.nifi.processors.standard.TestPutSFTP
[ERROR] org.apache.nifi.processors.standard.TestPutSFTP.testRunZeroByteFile  Time elapsed: 0.052 s  <<< FAILURE!
org.opentest4j.AssertionFailedError: expected: <1> but was: <0>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
	at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:150)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:145)
	at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:528)
	at org.apache.nifi.util.StandardProcessorTestRunner.assertTransferCount(StandardProcessorTestRunner.java:395)
	at org.apache.nifi.processors.standard.TestPutSFTP.testRunZeroByteFile(TestPutSFTP.java:119)