jmx

We have distributed web application developed few years back on JDK 5. How JMX will help this application? 1) Will it help me to monitor performance (Memory, CPU and Network & Disk IO)? 2) If so then application is deployed in multiple servers,how can I monitor in one single dashboard? 3) Do I have to make any new code changes to the existing application or can I monitor without code changes? 4) What else can we do apart from performance monitoring? Because name is Management Extensions (MX) what can we manage and how? It seems primary objective is not monitoring, it is management? I couldn’t

What is the purpose of JMX and what is it used for? I have been scanning through some of the tutorials on JMX and all they do is register some Mbeans and invoke those Mbeans from jconsole. If that is its purpose, then what is the difference between JMX and RMI (remote procedure call)? Thanks in advance! 'Remote Procedure Call' is a distributed computing concept where a process running on one host can call a procedure on another remote host. RMI in Java is one implementation of this concept. MBeans are bean classes that can be registered with a JMX bus to listen to events arriving on the bus or

I am looking for: What JMX is. Where I can find some good JMX Tutorials. What JMX can provide to me as a Java EE programmer. Anything else I should be aware of. JMX is a way to view and manipulate the runtime state of your application. It's somewhat similar in concept to SNMP, if that helps. IMO, it's indispensable for monitoring and understanding server-type applications that might not have any other user interface besides writing to a log file. The basic approach is to create an interface for the things you want to monitor, then have a class implement the interface, then register an instance

jvisualVm是jdk自带的可视化监控工具，功能很强大，可安装各种扩展插件。本篇不打算讲解如果使用详细的功能，只讲在windows环境怎么监控本地和远端（一般是无界面的linux系统）的java进程。 1、在远程机器上添加权限策略文件 在服务器{JAVA_HOME}/bin目录建立文件：jstatd.all.policy（名字随便，符合*.policy即可）， 文件内容为： grant codebase "file:${java.home}/../lib/tools.jar" { permission java.security.AllPermission; }; 2、修改服务器 hosts 文件中的 IP 地址 要使Java VisualVM 成功连接到远程服务器上，服务器端应该在 /etc/hosts 文件中把本机地址设为本机的 IP 地址。使用 hostname -i 命令查看，如果显示的是 127.0.0.1 或者与本机实际 IP 不一致的话，需要把 /etc/hosts 文件中相应的地址改为本机实际 IP 。 3、运行 jstatd 守护程序 在jstatd.all.policy 当前目录运行 nohup $JAVA_HOME/bin/jstatd -J-Djava.security.policy=jstatd.all.policy & 如果需要RMI 日志功能的话

Actually I wanted a solution working for JEE containers, specifically for Glassfish, but after I tried many combinations of settings and did not succeed, I reduced the setup to the simplest possible case. Here is my Hello World daemon started in a Docker container. I want to attach jconsole or VisulaVM to it. Everything is on the same machine. public class Main { public static void main(String[] args) { while (true) { try { Thread.sleep(3000); System.out.println("Hello, World"); } catch (InterruptedException e) { break; } } } } Dockerfile FROM java:8 COPY . /usr/src/myapp WORKDIR /usr/src

I run Tomcat7 using JDK7 on Centos6. I enable JMX using the following options: CATALINA_OPTS="${CATALINA_OPTS} -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9123 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.local.only=true" Unfortunately, when I check what ports are opened I discover 2 additional random ports: netstat -plunt | grep java Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 :::60555 :::* LISTEN 22752/java tcp 0 0 ::ffff:127.0.0.1:8080 :::* LISTEN 22752

I have a Java app running on Tomcat, and I would like to monitor counters using Windows Performance Monitor. Is this possible using a JMX adapter for the Java MBeans or by some other means? Since you tagged this with JMX and MBeans, I assume your counters are accessible from a Java MBean. If so you could use jconsole, provided with the Java SDK, to monitor the counters. Once you find your MBean in the MBeans tab, double click on the value and it will draw a nice line graph for easy monitoring. See JConsole Guide for more info. BenM The following tutorial might be of use: http://www.developer