Question

我无法将VisualVM连接到远程JVM。我使用以下参数启动了远程JVM：

 java -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.port=9000 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Djava.rmi.server.hostname=[server ip] -Dlog4j.configurationFile=file:///home/ubuntu/servicesLog4j2.xml -jar /home/ubuntu/Program.jar &

请注意 -Dcom.sun.management.jmxremote.ssl = false

然后我启动VisualVM并向服务器添加新的JMX连接。我特意检查选项：

不需要SLL连接

当连接失败时，我可以在VisualVM日志中看到以下错误。如果我在远程VM上禁用带有标志的SSL并指定在VisualVM中不需要SSL，我不确定为什么会涉及SSL。但是看起来这个错误阻止了连接。我错过了什么？

java.io.EOFException: SSL peer shut down incorrectly
    at sun.security.ssl.InputRecord.read(InputRecord.java:505)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954)
Caused: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1343)
    at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:728)
    at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:123)
    at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
    at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
    at java.io.DataOutputStream.flush(DataOutputStream.java:123)
    at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:229)
Caused: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: 
    javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
    at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:304)
    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 com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:118)
Caused: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: 
    javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake]
    at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:122)
    at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:205)
    at javax.naming.InitialContext.lookup(InitialContext.java:417)
    at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1929)
    at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1896)
    at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:287)
Caused: java.io.IOException: Failed to retrieve RMIServer stub
    at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:369)
    at com.sun.tools.visualvm.jmx.impl.JmxModelImpl$ProxyClient.tryConnect(JmxModelImpl.java:569)
[catch] at com.sun.tools.visualvm.jmx.impl.JmxModelImpl$ProxyClient.connect(JmxModelImpl.java:506)
    at com.sun.tools.visualvm.jmx.impl.JmxModelImpl.connect(JmxModelImpl.java:234)
    at com.sun.tools.visualvm.jmx.impl.JmxModelImpl.<init>(JmxModelImpl.java:223)
    at com.sun.tools.visualvm.jmx.impl.JmxModelProvider.createModelFor(JmxModelProvider.java:60)
    at com.sun.tools.visualvm.jmx.impl.JmxModelProvider.createModelFor(JmxModelProvider.java:41)
    at com.sun.tools.visualvm.core.model.ModelFactory.getModel(ModelFactory.java:111)
    at com.sun.tools.visualvm.tools.jmx.JmxModelFactory.getJmxModelFor(JmxModelFactory.java:69)
    at com.sun.tools.visualvm.jmx.impl.JmxApplicationProvider.addJmxApplication(JmxApplicationProvider.java:295)
    at com.sun.tools.visualvm.jmx.impl.JmxApplicationProvider.createJmxApplication(JmxApplicationProvider.java:200)
    at com.sun.tools.visualvm.jmx.JmxApplicationsSupport.createJmxApplicationImpl(JmxApplicationsSupport.java:319)
    at com.sun.tools.visualvm.jmx.JmxApplicationsSupport.createJmxApplicationInteractive(JmxApplicationsSupport.java:296)
    at com.sun.tools.visualvm.jmx.impl.AddJMXConnectionAction$1.run(AddJMXConnectionAction.java:80)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

Answer 1

头痛之后我如何设法解决这个问题：

如果远程计算机上有防火墙，则第二个随机端口（导出远程对象的位置）可能会出现问题。尝试禁用防火墙，如果它可以工作，则可能必须执行类似this的操作。 Tomcat有一个监听器可以解决这个问题：link
确保 -Djava.rmi.server.hostname 下的值从您的客户端位置解析为主机（这就是我的情况）
最后是 jconsole （在JDK bin文件夹中，与VisualVM相同）提供了非常有用的信息。使用-debug选项从控制台执行它。使用debug选项，Jconsole将弹出堆栈跟踪，解释客户端无法连接的真正原因。当您尝试连接到非SSL服务器时，JConsole最初将失败，然后将要求您连接“不安全”，接下来您将看到真正的原因，在我的情况下，它正在寻找环回IP 127.0上的对象导出端口。 0.1（因为我没有使用-Djava.rmi.server.hostname选项）。

希望有帮助！

不使用SSL时抛出“java.io.EOFException：SSL对等关闭错误”

1 个答案: