java - Unable to view Visual GC in VisualVM

Question

I am using Java VisualVM on my local windows machine to monitor my remote server(Linux). I am able to get all stats in Bisual VM except "Visual GC". It shows "Not Supported for this JVM". I have googled it and find that it might be because jstatd is not running and connected. So executed "jstatd -J-Djava.security.policy=/tmp/tools.policy". It shows a ip "175.41.139.225". I can't understand why it is trying to connect to this ip. It is not the ip of my remote machine nor of my local machine.

[root@shipping_pt mail]# jstatd -J-Djava.security.policy=/tmp/tools.policy
Could not contact registry
Connection refused to host: 175.41.139.225; nested exception is:
        java.net.ConnectException: Connection refused
java.rmi.ConnectException: Connection refused to host: 175.41.139.225; nested exception is:
        java.net.ConnectException: Connection refused
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
        at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Naming.java:177)
        at sun.tools.jstatd.Jstatd.bind(Jstatd.java:57)
        at sun.tools.jstatd.Jstatd.bind(Jstatd.java:66)
        at sun.tools.jstatd.Jstatd.main(Jstatd.java:143)
Caused by: java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
        at java.net.Socket.connect(Socket.java:546)
        at java.net.Socket.connect(Socket.java:495)
        at java.net.Socket.<init>(Socket.java:392)
        at java.net.Socket.<init>(Socket.java:206)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
        ... 8 more

Answer 1

On remote server,

vim /tmp/tools.policy

Add,

grant codebase "file:${java.home}/../lib/tools.jar" {
   permission java.security.AllPermission;
};

And start jstatsd

jstatd -J-Djava.security.policy=/tmp/tools.policy -J-Djava.rmi.server.hostname=<public_ip>

and you ready are with Visual GC inside VisualVM on local machine.