[NETCONF-604] WebSocketServer should not have static methods and static WebSocketServer (self) field

Blocks — Tue, 29 Jan 2019 14:06:19 +0000
While working on https://git.opendaylight.org/gerrit/#/c/79388/ I have come across a curious problem - my new Bierman02RestConfWiringTest introduced in that changed failed (only; it passed just fine locally) on the Jenkins job like this:
[INFO] --- maven-surefire-plugin:2.22.1:test (default-test) @ restconf-nb-bierman02 ---
[INFO] Surefire report directory: /w/workspace/netconf-maven-verify-neon-mvn35-openjdk8/restconf/restconf-nb-bierman02/target/surefire-reports
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.Bug3595Test
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.836 s - in org.opendaylight.controller.sal.restconf.impl.test.Bug3595Test
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.JSONRestconfServiceImplTest
[INFO] Tests run: 19, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.663 s - in org.opendaylight.controller.sal.restconf.impl.test.JSONRestconfServiceImplTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.BrokerFacadeTest
[INFO] Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.536 s - in org.opendaylight.controller.sal.restconf.impl.test.BrokerFacadeTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.ExpressionParserTest
[INFO] Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.117 s - in org.opendaylight.controller.sal.restconf.impl.test.ExpressionParserTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestGetAugmentedElementWhenEqualNamesTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.029 s - in org.opendaylight.controller.sal.restconf.impl.test.RestGetAugmentedElementWhenEqualNamesTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestCodecExceptionsTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.037 s - in org.opendaylight.controller.sal.restconf.impl.test.RestCodecExceptionsTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestconfImplNotificationSubscribingTest
[INFO] Tests run: 11, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.559 s - in org.opendaylight.controller.sal.restconf.impl.test.RestconfImplNotificationSubscribingTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.Bug8072Test
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.147 s - in org.opendaylight.controller.sal.restconf.impl.test.Bug8072Test
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestPostOperationTest
[WARNING] Tests run: 3, Failures: 0, Errors: 0, Skipped: 2, Time elapsed: 2.986 s - in org.opendaylight.controller.sal.restconf.impl.test.RestPostOperationTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.Bierman02RestConfWiringTest
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.81 s <<< FAILURE! - in org.opendaylight.controller.sal.restconf.impl.test.Bierman02RestConfWiringTest
[ERROR] testWiring(org.opendaylight.controller.sal.restconf.impl.test.Bierman02RestConfWiringTest)  Time elapsed: 1.568 s  <<< ERROR!
com.google.inject.CreationException: 
Unable to create injector, see the following errors:

1) Error notifying InjectionListener com.mycila.guice.ext.injection.MethodHandlerTypeListener$1@38f8e674 of org.opendaylight.netconf.sal.restconf.api.Bierman02RestConfWiring.
 Reason: java.lang.IllegalStateException: createInstance() has already been called
  at org.opendaylight.controller.sal.restconf.impl.test.Bierman02RestConfWiringTest$TestModule.configure(Bierman02RestConfWiringTest.java:38)
  while locating org.opendaylight.netconf.sal.restconf.api.Bierman02RestConfWiring

1 error
	at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:470)
	at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:184)
	at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:110)
	at com.google.inject.Guice.createInjector(Guice.java:99)
	at org.opendaylight.infrautils.inject.guice.testutils.GuiceRule.setUpGuice(GuiceRule.java:94)
	at org.opendaylight.infrautils.inject.guice.testutils.GuiceRule$1.evaluate(GuiceRule.java:84)
	at org.opendaylight.infrautils.testutils.LogRule$1.evaluate(LogRule.java:62)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: java.lang.IllegalStateException: createInstance() has already been called
	at com.google.common.base.Preconditions.checkState(Preconditions.java:507)
	at org.opendaylight.netconf.sal.streams.websockets.WebSocketServer.createInstance(WebSocketServer.java:57)
	at org.opendaylight.netconf.sal.restconf.impl.RestconfProviderImpl.start(RestconfProviderImpl.java:42)
	at org.opendaylight.netconf.sal.restconf.api.Bierman02RestConfWiring.start(Bierman02RestConfWiring.java:90)
	at org.opendaylight.netconf.sal.restconf.api.Bierman02RestConfWiring$$FastClassByGuice$$cd9fe095.invoke(<generated>)
	at com.google.inject.internal.cglib.reflect.$FastMethod.invoke(FastMethod.java:57)
	at com.mycila.guice.ext.injection.MethodInvoker$1$1.invoke(MethodInvoker.java:46)
	at com.mycila.guice.ext.jsr250.Jsr250PostConstructHandler.handle(Jsr250PostConstructHandler.java:47)
	at com.mycila.guice.ext.jsr250.Jsr250PostConstructHandler.handle(Jsr250PostConstructHandler.java:1)
	at com.mycila.guice.ext.injection.MethodHandlerTypeListener$1.afterInjection(MethodHandlerTypeListener.java:53)
	at com.google.inject.internal.MembersInjectorImpl.notifyListeners(MembersInjectorImpl.java:119)
	at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:121)
	at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:90)
	at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:268)
	at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
	at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
	at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
	at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:194)
	at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
	at com.google.inject.internal.InternalInjectorCreator$1.call(InternalInjectorCreator.java:205)
	at com.google.inject.internal.InternalInjectorCreator$1.call(InternalInjectorCreator.java:199)
	at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1085)
	at com.google.inject.internal.InternalInjectorCreator.loadEagerSingletons(InternalInjectorCreator.java:199)
	at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:180)
	... 23 more

[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestconfDocumentedExceptionMapperTest
[WARNING] Tests run: 50, Failures: 0, Errors: 0, Skipped: 3, Time elapsed: 6.279 s - in org.opendaylight.controller.sal.restconf.impl.test.RestconfDocumentedExceptionMapperTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestPutOperationTest
[WARNING] Tests run: 1, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 0 s - in org.opendaylight.controller.sal.restconf.impl.test.RestPutOperationTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.MediaTypesTest
[WARNING] Tests run: 7, Failures: 0, Errors: 0, Skipped: 4, Time elapsed: 0.34 s - in org.opendaylight.controller.sal.restconf.impl.test.MediaTypesTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestGetOperationTest
[WARNING] Tests run: 15, Failures: 0, Errors: 0, Skipped: 4, Time elapsed: 1.574 s - in org.opendaylight.controller.sal.restconf.impl.test.RestGetOperationTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestDeleteOperationTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.292 s - in org.opendaylight.controller.sal.restconf.impl.test.RestDeleteOperationTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestPutConfigTest
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.059 s - in org.opendaylight.controller.sal.restconf.impl.test.RestPutConfigTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestconfErrorTest
[INFO] Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.005 s - in org.opendaylight.controller.sal.restconf.impl.test.RestconfErrorTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.RestconfImplTest
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.328 s - in org.opendaylight.controller.sal.restconf.impl.test.RestconfImplTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.URITest
[WARNING] Tests run: 12, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 0.001 s - in org.opendaylight.controller.sal.restconf.impl.test.URITest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.InvokeRpcMethodTest
[WARNING] Tests run: 10, Failures: 0, Errors: 0, Skipped: 3, Time elapsed: 0.051 s - in org.opendaylight.controller.sal.restconf.impl.test.InvokeRpcMethodTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.test.CodecsExceptionsCatchingTest
[WARNING] Tests run: 1, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 0 s - in org.opendaylight.controller.sal.restconf.impl.test.CodecsExceptionsCatchingTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.websockets.test.RestStreamTest
[WARNING] Tests run: 2, Failures: 0, Errors: 0, Skipped: 2, Time elapsed: 0.07 s - in org.opendaylight.controller.sal.restconf.impl.websockets.test.RestStreamTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnToXmlTest
[INFO] Tests run: 20, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.14 s - in org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnToXmlTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnToXmlWithChoiceTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.015 s - in org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnToXmlWithChoiceTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnInstanceIdentifierToXmlTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.033 s - in org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnInstanceIdentifierToXmlTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnToXmlWithDataFromSeveralModulesTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.024 s - in org.opendaylight.controller.sal.restconf.impl.nn.to.xml.test.NnToXmlWithDataFromSeveralModulesTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.nn.to.json.test.NnToJsonWithAugmentTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.032 s - in org.opendaylight.controller.sal.restconf.impl.nn.to.json.test.NnToJsonWithAugmentTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.nn.to.json.test.NnJsonChoiceCaseTest
[INFO] Tests run: 10, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.052 s - in org.opendaylight.controller.sal.restconf.impl.nn.to.json.test.NnJsonChoiceCaseTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.input.to.cnsn.test.RestPutListDataTest
[WARNING] Tests run: 4, Failures: 0, Errors: 0, Skipped: 3, Time elapsed: 0.028 s - in org.opendaylight.controller.sal.restconf.impl.input.to.cnsn.test.RestPutListDataTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.json.to.nn.test.JsonToNnTest
[INFO] Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.113 s - in org.opendaylight.controller.sal.restconf.impl.json.to.nn.test.JsonToNnTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.json.to.nn.test.JsonLeafrefToNnTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.01 s - in org.opendaylight.controller.sal.restconf.impl.json.to.nn.test.JsonLeafrefToNnTest
[INFO] Running org.opendaylight.controller.sal.restconf.impl.json.to.nn.test.JsonIdentityrefToNnTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.006 s - in org.opendaylight.controller.sal.restconf.impl.json.to.nn.test.JsonIdentityrefToNnTest
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonBodyWriter
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.063 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonBodyWriter
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlBodyReaderMountPoint
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.091 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlBodyReaderMountPoint
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonPatchBodyReaderMountPoint
[INFO] Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.047 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonPatchBodyReaderMountPoint
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlPatchBodyReader
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.051 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlPatchBodyReader
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonPatchBodyReader
[INFO] Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.056 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonPatchBodyReader
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlBodyReader
[INFO] Tests run: 11, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.127 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlBodyReader
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlBodyWriter
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.074 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlBodyWriter
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonBodyReader
[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.061 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonBodyReader
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlPatchBodyReaderMountPoint
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.044 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestXmlPatchBodyReaderMountPoint
[INFO] Running org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonBodyReaderMountPoint
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.055 s - in org.opendaylight.controller.sal.rest.impl.test.providers.TestJsonBodyReaderMountPoint
[INFO] Running org.opendaylight.controller.sal.rest.impl.InstanceIdentifierTypeLeafTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.021 s - in org.opendaylight.controller.sal.rest.impl.InstanceIdentifierTypeLeafTest
[INFO] Running org.opendaylight.netconf.sal.restconf.impl.InstanceIdentifierCodecImplTest
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.011 s - in org.opendaylight.netconf.sal.restconf.impl.InstanceIdentifierCodecImplTest
[INFO] Running org.opendaylight.netconf.sal.rest.impl.DepthAwareNormalizedNodeWriterTest
[WARNING] Tests run: 11, Failures: 0, Errors: 0, Skipped: 2, Time elapsed: 0.142 s - in org.opendaylight.netconf.sal.rest.impl.DepthAwareNormalizedNodeWriterTest
[INFO] Running org.opendaylight.netconf.sal.streams.listeners.NotificationListenerTest
[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.074 s - in org.opendaylight.netconf.sal.streams.listeners.NotificationListenerTest
[INFO] Running org.opendaylight.netconf.sal.streams.listeners.ListenerAdapterTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.768 s - in org.opendaylight.netconf.sal.streams.listeners.ListenerAdapterTest
[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Errors: 
[ERROR]   Bierman02RestConfWiringTest.testWiring Â» Creation Unable to create injector, s...
[INFO] 
[ERROR] Tests run: 319, Failures: 0, Errors: 1, Skipped: 26
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] netconf-parent ..................................... SUCCESS [ 25.673 s]
[INFO] netconf-auth ....................................... SUCCESS [ 18.445 s]
[INFO] aaa-authn-odl-plugin ............................... SUCCESS [ 12.251 s]
[INFO] OpenDaylight :: AAA :: ODL NETCONF Plugin .......... SUCCESS [01:33 min]
[INFO] OpenDaylight :: AAA :: ODL NETCONF Plugin - NO CLUSTER SUCCESS [01:04 min]
[INFO] ietf-netconf-monitoring ............................ SUCCESS [ 23.988 s]
[INFO] ietf-netconf-monitoring-extension .................. SUCCESS [ 10.578 s]
[INFO] netconf-api ........................................ SUCCESS [ 23.713 s]
[INFO] ietf-netconf ....................................... SUCCESS [ 20.494 s]
[INFO] ietf-netconf-notifications ......................... SUCCESS [ 14.110 s]
[INFO] OpenDaylight :: Netconf :: API ..................... SUCCESS [ 57.880 s]
[INFO] netconf-mapping-api ................................ SUCCESS [  9.013 s]
[INFO] OpenDaylight :: Netconf :: Mapping API ............. SUCCESS [ 29.983 s]
[INFO] netconf-util ....................................... SUCCESS [ 22.187 s]
[INFO] odl-netconf-util ................................... SUCCESS [ 31.053 s]
[INFO] shaded-exificient-jar .............................. SUCCESS [ 11.216 s]
[INFO] shaded-exificient .................................. SUCCESS [  6.047 s]
[INFO] netconf-netty-util ................................. SUCCESS [ 39.290 s]
[INFO] OpenDaylight :: Netconf :: Netty Util .............. SUCCESS [ 40.955 s]
[INFO] netconf-notifications-api .......................... SUCCESS [  8.979 s]
[INFO] OpenDaylight :: Netconf :: Notification :: Api ..... SUCCESS [ 26.398 s]
[INFO] OpenDaylight :: Netconf :: Monitoring :: Impl ...... SUCCESS [ 27.604 s]
[INFO] netconf-client ..................................... SUCCESS [ 32.633 s]
[INFO] netconf-impl ....................................... SUCCESS [ 54.126 s]
[INFO] OpenDaylight :: Netconf :: Impl .................... SUCCESS [ 46.494 s]
[INFO] netconf-config ..................................... SUCCESS [  0.790 s]
[INFO] odl-netconf-client ................................. SUCCESS [ 39.282 s]
[INFO] OpenDaylight :: Netconf :: All ..................... SUCCESS [ 41.460 s]
[INFO] OpenDaylight :: Netconf Connector :: TCP ........... SUCCESS [ 41.444 s]
[INFO] OpenDaylight :: Netconf Connector :: SSH ........... SUCCESS [ 55.203 s]
[INFO] mdsal-netconf-ssh .................................. SUCCESS [ 22.167 s]
[INFO] mdsal-netconf-tcp .................................. SUCCESS [  5.891 s]
[INFO] mdsal-netconf-notification ......................... SUCCESS [ 17.897 s]
[INFO] mdsal-netconf-connector ............................ SUCCESS [ 24.291 s]
[INFO] mdsal-netconf-monitoring ........................... SUCCESS [ 12.141 s]
[INFO] mdsal-netconf-yang-library ......................... SUCCESS [ 14.585 s]
[INFO] mdsal-netconf-impl ................................. SUCCESS [  1.343 s]
[INFO] OpenDaylight :: Netconf :: Mdsal 1.9.0-SNAPSHOT .... SUCCESS [ 57.102 s]
[INFO] features-netconf ................................... SUCCESS [  1.761 s]
[INFO] features-netconf-aggregator ........................ SUCCESS [  0.071 s]
[INFO] sal-netconf-connector 1.9.0-SNAPSHOT ............... SUCCESS [01:14 min]
[INFO] netconf-topology ................................... SUCCESS [ 14.199 s]
[INFO] OpenDaylight :: Netconf Connector :: Netconf Connector SUCCESS [01:12 min]
[INFO] netconf-topology-config ............................ SUCCESS [  1.354 s]
[INFO] OpenDaylight :: Netconf Topology :: Netconf Connector + Netconf SSH Server + Netconf configuration via config topology datastore SUCCESS [01:24 min]
[INFO] callhome-model ..................................... SUCCESS [ 10.564 s]
[INFO] callhome-protocol .................................. SUCCESS [ 34.667 s]
[INFO] callhome-provider .................................. SUCCESS [ 16.285 s]
[INFO] OpenDaylight :: Netconf Connector :: Netconf Callhome Connector + Netconf SSH Server SUCCESS [01:06 min]
[INFO] OpenDaylight :: Netconf Connector :: All ........... SUCCESS [01:38 min]
[INFO] messagebus-netconf ................................. SUCCESS [ 23.551 s]
[INFO] odl-message-bus .................................... SUCCESS [01:07 min]
[INFO] netconf-topology-singleton ......................... SUCCESS [ 48.010 s]
[INFO] OpenDaylight :: Clustered Netconf Topology :: Netconf Connector + Netconf SSH Server SUCCESS [ 53.448 s]
[INFO] netconf-console .................................... SUCCESS [ 20.135 s]
[INFO] OpenDaylight :: Netconf Console + Karaf CLI for netconf CRUD operations SUCCESS [01:11 min]
[INFO] features-netconf-connector ......................... SUCCESS [  2.031 s]
[INFO] features-netconf-connector-aggregator .............. SUCCESS [  0.006 s]
[INFO] restconf-parent 1.9.0-SNAPSHOT ..................... SUCCESS [  0.191 s]
[INFO] ietf-restconf 1.9.0-SNAPSHOT ....................... SUCCESS [ 10.966 s]
[INFO] ietf-restconf-monitoring 1.9.0-SNAPSHOT ............ SUCCESS [  9.112 s]
[INFO] restconf-common-models 1.9.0-SNAPSHOT .............. SUCCESS [ 12.880 s]
[INFO] restconf-common 1.9.0-SNAPSHOT ..................... SUCCESS [ 12.638 s]
[INFO] OpenDaylight :: Restconf :: Common 1.9.0-SNAPSHOT .. SUCCESS [01:04 min]
[INFO] restconf-nb-bierman02 1.9.0-SNAPSHOT ............... FAILURE [ 53.756 s]
[INFO] sal-rest-connector-config 1.9.0-SNAPSHOT ........... SKIPPED
[INFO] OpenDaylight :: Restconf :: NB :: bierman02 :: Base 1.9.0-SNAPSHOT SKIPPED
[INFO] restconf-nb-bierman02-auth 1.9.0-SNAPSHOT .......... SKIPPED
[INFO] OpenDaylight :: Restconf :: NB :: bierman02 1.9.0-SNAPSHOT SKIPPED
[INFO] restconf-nb-rfc8040 1.9.0-SNAPSHOT ................. SKIPPED
[INFO] OpenDaylight :: Restconf :: NB :: RFC8040 1.9.0-SNAPSHOT SKIPPED
[INFO] OpenDaylight :: Restconf 1.9.0-SNAPSHOT ............ SKIPPED
[INFO] sal-rest-docgen 1.9.0-SNAPSHOT ..................... SKIPPED
[INFO] OpenDaylight :: MDSAL :: APIDOCS 1.9.0-SNAPSHOT .... SKIPPED
[INFO] OpenDaylight :: Restconf :: All 1.9.0-SNAPSHOT ..... SKIPPED
[INFO] restconf-nb-bierman02-noauth 1.9.0-SNAPSHOT ........ SKIPPED
[INFO] OpenDaylight :: Restconf :: NB :: bierman02 :: no-auth -- Deprecated, use odl-restconf-nb-bierman02 instead! 1.9.0-SNAPSHOT SKIPPED
[INFO] OpenDaylight :: Restconf :: no-auth -- Deprecated, use odl-restconf instead! 1.9.0-SNAPSHOT SKIPPED
[INFO] features-restconf 1.9.0-SNAPSHOT ................... SKIPPED
[INFO] features-restconf-aggregator 1.9.0-SNAPSHOT ........ SKIPPED
[INFO] yanglib ............................................ SKIPPED
[INFO] OpenDaylight :: Yanglib ............................ SKIPPED
[INFO] features-yanglib ................................... SKIPPED
[INFO] features-yanglib-aggregator ........................ SKIPPED
[INFO] netconf-features-parent ............................ SKIPPED
[INFO] netconf-karaf 1.9.0-SNAPSHOT ....................... SKIPPED
[INFO] netconf-models ..................................... SKIPPED
[INFO] netconf-testtool ................................... SKIPPED
[INFO] netconf-tools ...................................... SKIPPED
[INFO] netconf-artifacts .................................. SKIPPED
[INFO] netconf-subsystem .................................. SKIPPED
[INFO] restconf-artifacts 1.9.0-SNAPSHOT .................. SKIPPED
[INFO] restconf-models .................................... SKIPPED
[INFO] sal-rest-docgen-maven 1.9.0-SNAPSHOT ............... SKIPPED
[INFO] restconf-subsystem 1.9.0-SNAPSHOT .................. SKIPPED
[INFO] netconf-aggregator 1.6.0-SNAPSHOT .................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 33:59 min
[INFO] Finished at: 2019-01-23T17:41:16Z
[INFO] ------------------------------------------------------------------------
So it seems that something somewhere in another test already created a WebSocketServer, and did not close it properly... I'm not 100% sure how this works with Maven Surefire, but even with the entire netconf Maven building running in a single JVM process, the tests running in different artifacts should be fully isolated from each other by ClassLoader magic, right? So it would have to be any other of those 319 tests in the same artifact (restconf-nb-bierman02), not somewhere else, agreed?
It seems to me that the static WebSocketServer (self) field in WebSocketServer and the static createInstance and destroyInstance methods are asking for trouble and should ideally be removed. I'll have a go at and try to raise a Gerrit suggesting this.
OpenDaylight JIRA

[NETCONF-604] WebSocketServer should not have static methods and static WebSocketServer (self) field
