Error attaching to remote server: java.rmi.UnknownHostException: Unknown host: pid; nested exception is:
        java.net.UnknownHostException: pid
sun.jvm.hotspot.debugger.DebuggerException: java.rmi.UnknownHostException: Unknown host: pid; nested exception is:
        java.net.UnknownHostException: pid
        at sun.jvm.hotspot.RMIHelper.lookup(RMIHelper.java:115)
        at sun.jvm.hotspot.HotSpotAgent.connectRemoteDebugger(HotSpotAgent.java:517)
        at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:374)
        at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:304)
        at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:183)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:196)
        at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
        at sun.jvm.hotspot.tools.JStack.main(JStack.java:92)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at sun.tools.jstack.JStack.runJStackTool(JStack.java:140)
        at sun.tools.jstack.JStack.main(JStack.java:106)
Caused by: java.rmi.UnknownHostException: Unknown host: pid; nested exception is:
        java.net.UnknownHostException: pid
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:616)
        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:342)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Naming.java:101)
        at sun.jvm.hotspot.RMIHelper.lookup(RMIHelper.java:113)
        ... 13 more
Caused by: java.net.UnknownHostException: pid
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at java.net.Socket.connect(Socket.java:538)
        at java.net.Socket.<init>(Socket.java:434)
        at java.net.Socket.<init>(Socket.java:211)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
        ... 19 more