jmx

This question already has an answer here: Get system uptime in Java 5 answers Is there a OS-neutral method of querying for system (not JVM - I am aware of RuntimeMXBean.getUptime()) uptime in JavaSE 6 ? Thanks Yes and no. There are system specific ways of querying uptime (e.g. uptime on *nix) There are ways to detect the operating system . There is a small finite number of likely operating systems. And you're in a general purpose programming environment, so... so it shoudln't be a big deal that they implement it, since they are writting specific JRE for each platform, which is aware of uptime(

1. run JMX exporter as a java agent with all the four daemons. For this I have added EXTRA_JAVA_OPTS in hadoop-env.sh and yarn-env.sh : [root@cloud01 hadoop]# cat yarn-env.sh |egrep -v '^$|#' export YARN_RESOURCEMANAGER_OPTS="$YARN_RESOURCEMANAGER_OPTS -javaagent:/home/ec2-user/jmx_exporter/jmx_prometheus_javaagent-0.3.1.jar=9104:/home/ec2-user/jmx_exporter/prometheus_config.yml" export YARN_NODEMANAGER_OPTS="$YARN_NODEMANAGER_OPTS -javaagent:/home/ec2-user/jmx_exporter/jmx_prometheus_javaagent-0.3.1.jar=9105:/home/ec2-user/jmx_exporter/prometheus_config.yml" [root@do1cloud01 hadoop]# cat

前言 JMX即Java Managemen Extensions,是一个为应用程序植入管理功能的框架。一套标准的代理和服务，实际上，用户可以在任何Java应用程序中使用这些代理和服务实现管理。 常常在编程的过程中有一些配置信息需要动态的进行改变，我以往会有如下几种做法： 写死在Java code中，环境发生变化的时候修改Java code 写在名为*.properties的配置文件里，使用Java读取配置文件 然而今天我们将引入一种高级的方式来进行配置信息的管理，那便是JMX的引入。 如何使用JMX JMX做为一份规范，JDK中提供了JMX接口，因此安装了JDK后就可以开发基于JMX的代码了。 JMX具有两层结构，各层的组件如下 工具层 Mbeans 通知模型:Notification、NotificationListener Mbeans与数据类:Attribute、Operator 代理层 MBean Server 代理服务 下面学习下log4j2对JMX的支持 JMX-log4j2 Log4j 2 开始支持 JMX. StatusLogger, ContextSelector, 和所有的 LoggerContexts, LoggerConfigs 以及 Appenders 使用了MBeans并且可以被远程检测和控制. 使JMX生效 默认情况下JMX是生效的

I enabled JMX on the kafka brokers on port 8081. When I view the MBean properties in jConsole, I only see the following for kafka.consumer - kafka.consumer:type=FetchRequestAndResponseMetrics,name=FetchRequestRateAndTimeMs,clientId=ReplicaFetcherThread-2-413 kafka.consumer:type=FetchRequestAndResponseMetrics,name=FetchResponseSize,clientId=ReplicaFetcherThread-0-413 But none of the other ones that are identified in here under Kafka Consumer Metrics are emitted by JMX. Kafka Version # 0.8.2.1 I am specifically interested in - kafka.consumer:type=ConsumerFetcherManager,name=MaxLag,clientId=([-.

From the documentation of oracle : Domain Runtime MBean Server : This MBean server also acts as a single point of access for MBeans that reside on Managed Servers. what i want to do is to use this fact to access all my custom mBeans scattered in several managed servers. for example assume that i have two nodes server-1 server-2 . how can i access all of the custom mBeans on both server-1 server-2 by connecting to the administrator node ? i dont want to remotly access each node to return the result i want a single entry point i managed to get the names of the servers and the states and other

kafka官网：http://kafka.apache.org/ 官方文档：http://kafka.apache.org/documentation.html#quickstart kafka集群安装 下载： kafka_2.10-0.8.2.0.tar.gz 解压： tar -zxvf kafka_2.10-0.8.2.0 .tgz 软链接配置： ln -s kafka_2.10-0.8.2.0 kafka 修改配置文件 ： cd kafka/config vi server.properties server.properties 配置说明（仅对需要留意的说明） ： broker.id=0 // 这个ID是唯一标示，须唯一 port=9092 // 访问端口，默认为 9092 host.name=kafka-server1 // 多块网卡时，需注意。 num.io.threads=10 // disk I/O 线程数，挂多块盘的时候，应大于硬盘数 log.dirs=/home/kafka/data/kafka-logs // 存放kafka topic数据的地址，很重要，别配错 log.retention.hours=168 // 数据缓存周期，默认为7天，硬盘不够时可以调小 zookeeper.connect=zk-server1:2181,zk-server2:2181

Logstash 是一个运行在 JVM 上的软件，也就意味着 JMX 这种对 JVM 的通用监控方式对 Logstash 也是一样有效果的。要给 Logstash 启用 JMX，需要修改 ./bin/logstash.lib.sh 中 $JAVA_OPTS 变量的定义，或者在运行时设置 LS_JAVA_OPTS 环境变量。 在 ./bin/logstash.lib.sh 第 34 行 JAVA_OPTS=”$JAVA_OPTS -Djava.awt.headless=true” 下，添加如下几行： [root@monitor logstash]# vim bin/logstash.lib.sh JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote" JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.port=9010" JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.local.only=false" JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.authenticate=false" JAVA_OPTS="$JAVA_OPTS -Dcom.sun

1.prometheus的配置 - job_name: 'java01' #按照这个来分组 scrape_interval: 10s static_configs: - targets: ['192.168.1.44:6060'] labels: instance: jvm44 2. jmx-exporter/simple-config.yml #tomcat的启动参数文件 [root@k8s prom-jvm-demo]# cat simple-config.yml --- rules: - pattern: '.*' 这个文件在启动docker的时候用到 docker run -d \ --name tomcat-1 \ -v <path-to-prom-jvm-demo>:/jmx-exporter \ -e CATALINA_OPTS="-Xms64m -Xmx128m -javaagent:/jmx-exporter/jmx_prometheus_javaagent-0.3.1.jar=6060:/jmx-exporter/simple-config.yml" \ -p 6060:6060 \ -p 8080:8080 \ tomcat:8.5-alpine 来源： https://www.cnblogs.com/hixiaowei/p/11637042.html