title: AttachNotSupportedException when trying to start a JFR recording
body: <p>I'm receiving <code>AttachNotSupportedException</code> when trying to start a JFR recording.
  It was working normally, until now.</p>
  
  <pre><code>jcmd 3658 JFR.start maxsize=100M filename=jfr_1.jfr dumponexit=true settings=profile
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>3658:
  com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
          at sun.tools.attach.LinuxVirtualMachine.&lt;init&gt;(LinuxVirtualMachine.java:106)
          at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
          at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
  </code></pre>
  
  <p>What might be happening?</p>
  
  <p>SO: Oracle Linux Server release 6.7</p>
  
  <pre><code>$ java -version
  java version "1.8.0_102"
  Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
  Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)
  </code></pre>