jmx

Has anyone ever got a remote JMX JConsole to work?

匿名 (未验证) 提交于 2019-12-03 08:44:33
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: It seems that I've never got this to work in the past. Currently, I KNOW it doesn't work. But we start up our Java process: - Dcom . sun . management . jmxremote - Dcom . sun . management . jmxremote . port = 6002 - Dcom . sun . management . jmxremote . authenticate = false - Dcom . sun . management . jmxremote . ssl = false I can telnet to the port, and "something is there" (that is, if I don't start the process, nothing answers, but if I do, it does), but I can not get JConsole to work filling in the IP and port. Seems like it

Java 8 performance VS. Java 7

匿名 (未验证) 提交于 2019-12-03 08:36:05
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I'm developing a imaging processing Java 7u80 application using C++ libraries through JNI. As I was willing to execute streams in parallel with Java 8u60, I just switched to JDK 8 and relaunched all my unit tests. Java 8u60 Overall duration: **35'408 [ms]** Java 7u80 Overall duration: **29'581 [ms]** Java 7 is in my case 17% faster than Java 8 (same code, code level resp. 7 and 8). I was wondering if such result may be specific to my application or if others have already notice a downgrade of the performance moving form Java 7 to 8? Are

在什么场景下该使用JMX,如何使用,会带来什么好处,这种场景下有哪些替代方案?

被刻印的时光 ゝ 提交于 2019-12-03 07:20:33
一个大系统中,各内部模块系统之间的基于接口方式的互相调用和管理,使用jmx是最佳方案. 带来的好处是 1.面向接口,远程调用对于开发人员是透明的,模块在调用jmx接口时,与调用本地方法几乎相同. 2.可视化的管理界面,通过Jconsole等jmx客户端,可以实时监控系统,并且可实时调用方法进行某些操作. 典型应用场景:  某聊天系统,一台服务器作为 在线用户列表服务器 A1,n台服务器为用户提供聊天业务处理 N1 ,N2,N3..., 一台服务器作为后台管理系统A2.  系统管理员现在进行下面这样一个操作,察看某用户是否在线,找到该用户,发现其在线,则将该用户加入黑名单,并踢下线. 对应的jmx接口可以由以下几个:  A1为A2提供查询在线用户jmx接口,加入黑名单接口,kickout接口, A1为N1..等服务器提供以下接口: 注册业务服务器,添加在线用户.查找黑名单用户 N1...到N3为A1提供kickout接口. 因此在上面的踢下线操作,则由用户在A2的web界面发出,交由A1执行,A1记录黑名单之后,再找到用户所在业务服务器调用N1提供的接口让用户下线. 以上情形是在生产环境下的部署,而在开发工作,则可以将A1,A2,N...N3等功能合并在一个应用中调试. 由于使用的是jmx接口,在本地调试合并之后,可以直接调用应用内部接口方法.

Better options to view JMX beans other than Jconsole [closed]

你离开我真会死。 提交于 2019-12-03 06:52:31
Closed. This question is off-topic. It is not currently accepting answers. Learn more . Want to improve this question? Update the question so it's on-topic for Stack Overflow. JConsole has quiet a buggy view to monitor JMX published counters. What are the other alternatives ? I am unable to find any, other than JVisualVM which in effect uses the same view Some alternatives are (since I'm fine with JVisulaVM I haven't tried them yet): JRockit Mission Control (will be added as Java Mission Control to some upcoming Oracle JDK) Argus JMX Browser MC4J JMX Console eclipse-jmx jManage JMiniX hawtio

How to set request timeout for JMX Connector

扶醉桌前 提交于 2019-12-03 05:37:32
I'm trying to set request timeout for JMX Connector but seems like it doesn't work. env.put("jmx.remote.x.request.waiting.timeout", new Long(30000)); But since it didn't work, i googled to see the reason and found out that in standard JMX remote api doesn't support the above environment variable. Is there any other way to set the request time-out? If you use default JMX protocol - the RMI - then the best option for the client side timeout is the global RMI connection timeout. Of course it will work only if you do not need to use RMI connections that have to be open forever. Here is sample

Web based JMX console for Tomcat?

若如初见. 提交于 2019-12-03 05:11:27
问题 Are there any web based JMX consoles available for Tomcat that basically provide the same functionality as Tomcat's JMX Proxy Servlet but in a more user friendly manner? I understand that I could simply use jconsole over RMI but this solution is not always applicable because of firewall issues. It also requires extra server-side configuration and in some organizations changing server-side configurations might not be that straight-forward. So what I would like to have is a simple war-file that

Difference between JMX and RMI

烂漫一生 提交于 2019-12-03 05:04:44
问题 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! 回答1: '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

Jconsole与Jmx 分析JVM状况(下) 转

倾然丶 夕夏残阳落幕 提交于 2019-12-03 04:45:32
出处: Jconsole与Jmx 分析JVM状况(下) 线程(ThreadMXBean ) 从 Jconsole 画面取得线程画面如下: 左下角列出了所以正在运行的线程。通过点击某个线程,右下脚可以看到这个线程的相关信息。 Mean 中提供 ThreadMXBean 相关属性和操作如下 详细个属性说明请看http://gceclub.sun.com.cn/Java_Docs/jdk6/html/zh_CN/api/java/lang/management/ThreadMXBean.html 代码中取得 ThreadMXBean public class JmxRemote { public static void main(String[] args) { try {JMXServiceURL address = new JMXServiceURL( "service:jmx:rmi:///jndi/rmi://localhost:9999/jmxrmi"); JMXConnector connector = JMXConnectorFactory.connect(address); MBeanServerConnection mbs = connector.getMBeanServerConnection(); ThreadMXBean threadBean =

Jconsole与Jmx 分析JVM状况(上) 转

旧城冷巷雨未停 提交于 2019-12-03 04:44:46
出处: Jconsole与Jmx 分析JVM状况(上) JVM 平台提供 Mbeans 说明   在 Java 2 平台 5.0 以上版本,有一组 API 可以让 Java 应用程序和允许的工具监视和管理 Java 虚拟机( JVM)和虚拟机所在的本机操作系统。该组 API 在 java.lang.management 。可以通过这些 API 可以监控 local端 JVM ,同时也可以监控远端 JVM Java 平台提供了如下一些接口用于管理 JVM 平台   ClassLoadingMXBean Java 虚拟机的类加载系统。   CompilationMXBean Java 虚拟机的编译系统。   MemoryMXBean Java 虚拟机的内存系统。   ThreadMXBean Java 虚拟机的线程系统。   RuntimeMXBean Java 虚拟机的运行时系统。   OperatingSystemMXBean Java 虚拟机在其上运行的操作系统。   GarbageCollectorMXBean Java 虚拟机中的垃圾回收器。   MemoryManagerMXBean Java 虚拟机中的内存管理器。   MemoryPoolMXBean Java 虚拟机中的内存池。 这些 Bean 我们从 ManagementFactory 类中定义。 访问 Mean

Remote monitoring with visualvm and JMX

Deadly 提交于 2019-12-03 04:23:00
问题 I would like to monitor a remotely running java (spring boot) application with jvisualvm (or jconsole). When running locally, I can see the managed beans in both jvisualvm and jconsole. When running remotely I cannot connect. I tried it with several different java processes (e.g. with spring xd). Looking for answers here on SO and on Google did not help. These are my JAVA_OPTS (on the remote host): $ echo $JAVA_OPTS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9010 -Dcom