Elasticsearch(1)SinkITCase fails on Java 9

java.lang.ExceptionInInitializerError
	at org.elasticsearch.node.internal.InternalNode.<init>(InternalNode.java:143)
	at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:159)
	at org.elasticsearch.node.NodeBuilder.node(NodeBuilder.java:166)
	at org.apache.flink.streaming.connectors.elasticsearch.EmbeddedElasticsearchNodeEnvironmentImpl.start(EmbeddedElasticsearchNodeEnvironmentImpl.java:46)
	at org.apache.flink.streaming.connectors.elasticsearch.ElasticsearchSinkTestBase.prepare(ElasticsearchSinkTestBase.java:72)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	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.RunBefores.evaluate(RunBefores.java:24)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
	at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
	at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.UnsupportedOperationException: Boot class path mechanism is not supported
	at java.management/sun.management.RuntimeImpl.getBootClassPath(RuntimeImpl.java:99)
	at org.elasticsearch.monitor.jvm.JvmInfo.<clinit>(JvmInfo.java:77)
	... 24 more