java.lang.AssertionError: Address should be throttled

[icedream]

The tests have been randomly throwing above error, as visible in the build logs. It's always been the same component (Waterfall-Proxy).

Example: https://hub.docker.com/r/icedream/waterfall/builds/bbbafvrjuu6zrvw7xbzgcmb/

Running net.md_5.bungee.ThrottleTest

Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.684 sec <<< FAILURE!
testThrottle(net.md_5.bungee.ThrottleTest)  Time elapsed: 0.683 sec  <<< FAILURE!
java.lang.AssertionError: Address should be throttled
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at net.md_5.bungee.ThrottleTest.testThrottle(ThrottleTest.java:26)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
	at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
	at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)

Tests run: 24, Failures: 1, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Waterfall-Parent ................................... SUCCESS [ 18.288 s]
[INFO] Waterfall-Chat ..................................... SUCCESS [ 43.975 s]
[INFO] Waterfall-Config ................................... SUCCESS [ 11.370 s]
[INFO] Waterfall-Event .................................... SUCCESS [  8.081 s]
[INFO] Waterfall-Protocol ................................. SUCCESS [ 18.117 s]
[INFO] Waterfall-API ...................................... SUCCESS [ 22.951 s]
[INFO] Waterfall-Log ...................................... SUCCESS [  2.637 s]
[INFO] Waterfall-Native ................................... SUCCESS [ 25.093 s]
[INFO] Waterfall-Query .................................... SUCCESS [  3.518 s]
[INFO] Waterfall-Proxy .................................... FAILURE [ 30.722 s]
[INFO] Waterfall-Bootstrap ................................ SKIPPED
[INFO] Waterfall Modules .................................. SKIPPED
[INFO] cmd_alert .......................................... SKIPPED
[INFO] cmd_find ........................................... SKIPPED
[INFO] cmd_list ........................................... SKIPPED
[INFO] cmd_send ........................................... SKIPPED
[INFO] cmd_server ......................................... SKIPPED
[INFO] reconnect_yaml ..................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 03:06 min
[INFO] Finished at: 2017-12-04T10:41:45Z