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PO
 

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    <p>I experienced this same issue. </p> <p>Exception in thread "main" com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded</p> <p>The solution was found doing some heavy googling.</p> <p>First answer came <a href="http://www.jvmmonitor.org/doc/index.html">http://www.jvmmonitor.org/doc/index.html</a> . Appears there is a bug:</p> <blockquote> <p>If you see the additional message "Unable to open socket file: target process not responding or Hotspot VM not loaded", either your application didn't respond creating a socket file like /tmp/.java_pid1234 (e.g. due to hangup, file system permission), or JVM Monitor was not able to find the created socket file (e.g. due to the bug 7009828).</p> </blockquote> <p>Then after some more searching I found a conversation on github for another tool which had the same symptom "Unable to open socket file" (https://github.com/rhuss/jolokia/issues/34):</p> <blockquote> <p>jgreen: Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded </p> <p>jgreen: right I have it working but only when lauching as the exact same user as activemq. root does not work</p> </blockquote> <p>This last piece was the solution. The only way this .attach call would be successful was through running the java code that calls attach as the <strong>same</strong> user as the one who owned the process running the jvm. In my case it was the activemq user.</p> <pre><code>System.out.println("HEAP: " + ManagementFactory.getMemoryMXBean().getHeapMemoryUsage()); HEAP: init = 27127296(26491K) used = 3974200(3881K) committed = 26345472(25728K) max = 675086336(659264K) </code></pre>
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    1. POAttachNotSupportedException due to missing java_pid file in Attach API
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    1. USkwoodson
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    1. CORun as same user, win, thank you.
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    2. COWorked with same user! Thanks a lot!
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      1. USGonzalo
 

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