arthas java.net.ConnectException: Connection refused: connect

nmpmafwu 于 2022-10-20 发布在 Java

关注(0)|答案(3)|浏览(1513)

Connect to telnet server error: 127.0.0.1 3658
java.net.ConnectException: Connection refused: connect.

Interestingly it works on some jar files. But in most applications I get the above error. Even in the arthas-demo.jar file.
I tested with 4 different java versions. I restarted the process multiple times.

I am using Windows OS and firewall is turned off.

There are hundreds of people getting this error. Why is root not explored?

arthas

来源：https://github.com/alibaba/arthas/issues/2305

3条答案

按热度按时间

os8fio9y1#

When arthas starts successfully, it will listen to port 3658 in the application process.
Then arthas-boot will try to connect to port 3658 with telnet.

If in step 1, starting the arthas agent fails, it will Connection refused in step 2.

So check ~/logs/arthas/arthas.log why the arthas agent failed to start.

赞(0）回复(0）举报 2022-10-20

w46czmvw2#

[INFO] Try to attach process 22568
Picked up JAVA_TOOL_OPTIONS:
[ERROR] Start arthas failed, exception stack trace:
com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
at sun.tools.attach.LinuxVirtualMachine.(LinuxVirtualMachine.java:106)
at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:78)
at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:250)
at com.taobao.arthas.core.Arthas.attachAgent(Arthas.java:102)
at com.taobao.arthas.core.Arthas.(Arthas.java:27)
at com.taobao.arthas.core.Arthas.main(Arthas.java:161)
[INFO] Attach process 22568 success.
[INFO] arthas-client connect 127.0.0.1 3658
Connect to telnet server error: 127.0.0.1 3658
java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:607)
at org.apache.commons.net.SocketClient.connect(SocketClient.java:188)
at org.apache.commons.net.SocketClient.connect(SocketClient.java:209)
at com.taobao.arthas.client.TelnetConsole.process(TelnetConsole.java:306)
at com.taobao.arthas.client.TelnetConsole.main(TelnetConsole.java:166)
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 com.taobao.arthas.boot.Bootstrap.main(Bootstrap.java:624)