title: VirtualMachine.attach(pid) fails with java.io.IOException: Can not attach to current VM
body: <p>After going through <a href="http://jigsaw-dev.1059479.n5.nabble.com/Disallowing-the-dynamic-loading-of-agents-by-default-revised-td5716181i20.html" rel="noreferrer">this</a> discussion, I'm led to believe the option to attach to the same VM, by default has been disabled in OpenJDK11.</p>
  
  <p>I'm trying to upgrade a java agent to OpenJDK11, during the test cases when <code>VirtualMachine.attach(pid)</code> is called I see it failing with below error. What is the correct way to deal with this situation?</p>
  
  <p>Complete stack trace:</p>
  
  <pre><code>java.io.IOException: Can not attach to current VM
  
  at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.&lt;init&gt;(HotSpotVirtualMachine.java:75)
  at jdk.attach/sun.tools.attach.VirtualMachineImpl.&lt;init&gt;(VirtualMachineImpl.java:48)
  at jdk.attach/sun.tools.attach.AttachProviderImpl.attachVirtualMachine(AttachProviderImpl.java:69)
  at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:207)
  at org.kantega.notsoserial.WithAgentIT.attachAgent(WithAgentIT.java:76)
  at org.kantega.notsoserial.WithAgentIT.attackShouldBePreventedWithAgent(WithAgentIT.java:47)
  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:566)
  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$2.evaluate(ParentRunner.java:268)
  at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
  at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
  at com.intellij.rt.execution.junit.IdeaTestRunner$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)
  </code></pre>