GetTCP testSuccessInteraction failing for multi-threaded builds and bare .m2 repo

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T16:41:47+00:00)
Maven home: /usr/local/maven
Java version: 1.8.0_121, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.121-0.b13.29.amzn1.x86_64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.4.41-36.55.amzn1.x86_64", arch: "amd64", family: "unix"

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Test set: org.apache.nifi.processors.gettcp.TestGetTCP
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Tests run: 4, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 2.775 sec <<< FAILURE! - in org.apache.nifi.processors.gettcp.TestGetTCP
testSuccessInteraction(org.apache.nifi.processors.gettcp.TestGetTCP)  Time elapsed: 0.712 sec  <<< FAILURE!
java.lang.AssertionError: expected:<1> but was:<0>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:743)
	at org.junit.Assert.assertEquals(Assert.java:118)
	at org.junit.Assert.assertEquals(Assert.java:555)
	at org.junit.Assert.assertEquals(Assert.java:542)
	at org.apache.nifi.util.StandardProcessorTestRunner.assertTransferCount(StandardProcessorTestRunner.java:319)
	at org.apache.nifi.util.StandardProcessorTestRunner.assertAllFlowFilesTransferred(StandardProcessorTestRunner.java:314)
	at org.apache.nifi.processors.gettcp.TestGetTCP.testSuccessInteraction(TestGetTCP.java:82)