无法在VisualVM中查看Visual GC [英] Unable to view Visual GC in VisualVM
问题描述
我在本地Windows机器上使用Java VisualVM监视远程服务器(Linux). 我可以获取Bisual VM中的所有统计信息,除了" Visual GC ".它显示此JVM不支持".我用谷歌搜索它,发现可能是因为jstatd没有运行和连接.因此执行了" jstatd -J-Djava.security.policy =/tmp/tools.policy ". 它显示一个ip" 175.41.139.225 ".我不明白为什么它要尝试连接到该IP.它不是我的远程计算机或本地计算机的ip.
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
推荐答案
在远程服务器上,
vim /tmp/tools.policy
添加
grant codebase "file:${java.home}/../lib/tools.jar" {
permission java.security.AllPermission;
};
然后启动jstatsd
And start jstatsd
jstatd -J-Djava.security.policy=/tmp/tools.policy -J-Djava.rmi.server.hostname=<public_ip>
您已经准备好在本地计算机上的VisualVM中使用Visual GC.
and you ready are with Visual GC inside VisualVM on local machine.
这篇关于无法在VisualVM中查看Visual GC的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!