王奕然-优快云博客

转载 nginx error: (99: Cannot assign requested address)如何解决？

https://cloud.tencent.com/developer/ask/55222/answer/91335

2019-09-26 14:35:04 5589

转载 opc plc解释

https://opcdatahub.com/WhatIsOPC.htmlmodbus和opc区别https://modbus.control.com/thread/1026215470

2019-09-23 11:20:51 1129

转载 linux启动service服务

https://medium.com/@ameyadhamnaskar/running-java-application-as-a-service-on-centos-599609d0c641

2019-09-17 15:53:17 1723

转载 win10摄像头灰屏问题

http://iknow.lenovo.com/detail/dc_141257.htmlhttps://www.itsupportguides.com/knowledge-base/windows-10/solved-lenovo-built-in-webcam-camera-not-working-windows-10/https://support.microsoft.com/en-...

2019-09-11 10:50:12 4412

https://github.com/webrtc/apprtc/issues/603https://github.com/webrtc/apprtc/issues/556https://blog.youkuaiyun.com/qq_31967569/article/details/81060525https://github.com/webrtc/apprtc/issues/384https...

2019-09-09 10:56:39 532

转载 javascript modules

https://www.freecodecamp.org/news/javascript-modules-a-beginner-s-guide-783f7d7a5fcc/https://scotch.io/tutorials/a-zero-configuration-module-bundler-meet-parcelhttps://hungryturtlecode.com/tutoria...

2019-08-15 17:33:26 306

转载百度地图，openlayers ,arcgis

百度地图接openlayershttp://www.openlayers.cn/forum.php?mod=viewthread&tid=222https://www.cnblogs.com/songjiang6940/p/openlayers_baidu.html

2019-08-07 17:22:19 607

原创 kubernetes资料

https://queue.acm.org/detail.cfm?id=2898444这篇文章写了kubernetes的前世今生，之前学习kbs总是感觉他的一些设定很怪，这里说了为什么这么设计，还有现实中设计容器遇到的问题。之前公司使用了spring cloud，但实践中发现，spring cloud更多的是用软件层的实现来控制多服务节点，这种感觉有些无力感，在多服务多节点的情况下，好多部...

2019-07-26 11:48:30 345

转载 maven如何使用外部的配置文件

https://stackoverflow.com/questions/1510071/maven-how-can-i-add-an-arbitrary-classpath-entry-to-a-jar参考https://yq.aliyun.com/articles/679578?spm=a2c4e.11163080.searchblog.180.54952ec100XbSaI fou...

2019-07-22 16:29:30 1654

转载 docker的一些命令，kubernetes和docker区别

docker的一些命令docker run --name mysql5.7.26 -e MYSQL_ROOT_PASSWORD=3edc4rfv -d mysql:5.7.26连接mysqldocker run -it --rm mysql mysql -hdockerip -uroot -p查看docker ip>docker inspect -f "{{range ....

2019-07-17 16:15:42 1971

转载微服务的一些资料

介绍微服务拆分的一些问题https://auth0.com/blog/introduction-to-microservices-part-4-dependencies/https://www.apiacademy.co/articles/2015/10/the-whole-truth-about-embedding-of-dependencies-in-microservices...

2019-07-16 13:39:49 196

转载关于activemq消息策略

https://blog.christianposta.com/activemq/activemq-message-priorities-how-it-works/http://activemq.apache.org/featurestopic queue区别http://activemq.apache.org/how-does-a-queue-compare-to-a-topic.h...

2019-07-09 16:36:27 300

转载 mvn package 和mvn install区别

https://stackoverflow.com/questions/16602017/how-are-mvn-clean-package-and-mvn-clean-install-different今天一个依赖项目改了一些东西，但是mvn package依赖的项目后，还是找不到，后来找的了这两个命令的区别Well, both will clean. That means they'l...

2019-07-08 17:15:55 4540

原创 spring boot依赖包冲突

今天打包maven报了很多错，我之前是parent继承parent项目，该项目没有用spring boot,而是自己到了很多spring 的各种包，但是我这个继承项目screen，想用spring boot,就造成很多异常，我开始不理解maven的机制，<depndency>spring boot<depndency>的同时，又dependency很多spring 的一...

2019-07-04 11:21:57 3294

原创安装mysql 7 Linux - Generic

由于需要在不能连外网的环境下安装mysql，网上yum等方法就不适用了，下面贴出一个可以执行的方法安装mysql 添加用户组groupadd mysqluseradd -r -g mysql -s /bin/false mysql进入安装路径cd /usr/local解压tar zxvf /root/software/mysql-5.7.26-linux-g...

2019-07-02 16:47:29 1603

原创 centos 7 安装jdk

安装jdk1）进入目录cd software/2）创建文件夹mkdir jdk73）输入解压缩包命令sudo tar xvzf jdk-7u80-linux-x64.tar.gz -C jdk74）设置环境变量export JAVA_HOME=/root/software/jdk7/jdk1.7.0_80export PATH=$PATH:$...

2019-07-02 10:07:35 227

转载转载 Centos7 卸载jdk1.8

首先：rpm -qa|grep java这里有两个版本的jdk 所以我们需要卸载两个jdk使用 yum 卸载： yum -y remove java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64然后再查看：rpm -qa|grep java我的电脑没有 nodeps 这个功能，所以我选择 yum 卸载最后发现还是没有卸...

2019-07-02 09:25:20 1054

转载 java 性能优化

https://dzone.com/articles/disappointing-story-on-java-memory-optimizationhttp://java-performance.info/overview-of-memory-saving-techniques-java/

2019-06-27 17:31:21 237

转载关于tcp,udp区别如何优化tcp性能 Nagle's Algorithm TCP_NODELAY

tcp udp解释https://www.diffen.com/difference/TCP_vs_UDPhttp://www.steves-internet-guide.com/tcp-vs-udp/Nagle's Algorithmhttps://www.extrahop.com/company/blog/2016/tcp-nodelay-nagle-quickack-best...

2019-06-26 09:35:34 556

转载黑海边的天堂

https://www.douban.com/note/640342065/<黑海边的天堂> (2014-01-29 14:56:56)　　　　　　　　一　　清晨，天色蓝蒙蒙的，窗帘映出几缕光线。我的妻子格丽雅还像以前一样，准备着一家人的早餐。我默默地看着她的背影。　　吃过早饭，我们出发了。儿子开着车，我和妻子坐在后座上。车子在俄罗斯广阔的土地上飞驰。　　眼下已是深秋，病...

2019-06-25 16:46:56 913

转载 ThreadLocal一些源码摘抄

thread里有 threadlocalThreadLocal.ThreadLocalMap threadLocals /* ThreadLocal values pertaining to this thread. This map is maintained * by the ThreadLocal class. */ ThreadLocal.ThreadLocal...

2019-06-25 15:22:23 174

转载 redis性能方面的一些资料汇总

关于redis性能优化的几点建议https://sorentwo.com/2015/07/27/optimizing-redis-usage-for-caching.htmlredis lru的说明https://redis.io/topics/lru-cacheredis-benchmark 测试性能的使用https://redis.io/topics/benchmarks...

2019-06-25 14:05:52 152

转载 Thread Interruption

Thread Interruption The wait() method—like the sleep() and join() methods that we examined in Section 2.1—may under certain circumstances throw an InterruptedException. These methods all throw such...

2019-06-19 14:52:09 385

原创 CyclicBarrier LockSupport学习

学习CyclicBarrier可以了解下LockSupport主要是这个方法/** * Disables the current thread for thread scheduling purposes unless the * permit is available. * * <p>If the permit is available then it is con...

2019-06-19 14:48:39 248

转载关于CyclicBarrier的一些解释

我在网上找了一些关于CyclicBarrier的一些解释In a nutshell, just to understand key functional differences between the two :public class CountDownLatch { private Object mutex = new Object(); private int co...

2019-06-19 09:58:59 289 1

原创 CountDownLatch自旋锁 clh

CountDownLatch这个类大家可以学习学习，里面用了一个clh的自旋锁模式大家可以看看关于自旋锁的介绍，他是一个公平锁。避免饥饿模式https://www.jianshu.com/p/5ad8539e25c3具体的代码可以看下node这个类，实现了自旋锁模式贴下一些代码片段abstractqueuedsynchronizerdoReleaseSharedN...

2019-06-18 16:10:37 412

转载解析spring xml报错没找到handler

https://stackoverflow.com/questions/971158/maven-2-assembly-plugin-clobbers-some-meta-inf-fileshttps://stackoverflow.com/questions/8609322/need-understanding-of-spring-handlers-and-spring-schemasI...

2019-06-05 10:51:27 297

转载 spring boot实现不用重启就能动态编译修改的代码

https://stackoverflow.com/questions/45639904/intelijj-idea-springboot-devtoolsspring boot实现不用重启就能动态编译修改的代码This a guide I used some time ago to make it work: https://www.mkyong.com/spring-boo...

2019-05-22 11:36:22 3186

转载如何优化redis内存使用

这篇文章讲了如何优化redis内存使用，用最小的内存存储更多的数据，值得一读Understanding Redis hash-max-ziplist-entriesThis is an advanced topic for people who do serious stuff in Redis. I need to do serious stuff in Redis so I'm try...

2019-01-08 11:39:34 522

转载 exec user process caused "exec format error" when run container with CMD on RHE

exec user process caused "exec format error" when run container with CMD on RHEjust adding #!/bin/bash to my entry point file fixed the issue.转自：https://github.com/projectatomic/buildah/issues/475...

2018-08-20 14:32:45 6479

转载 kubernetes文档

kubernetes api https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/#pod-v1-corehttps://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#types-kinds...

2018-08-19 17:36:54 420

转载 kubernetes kubeadm 阿里云镜像安装方法

使用 kubeadm 创建一个 kubernetes 集群https://yq.aliyun.com/articles/431059深入玩转K8S之使用kubeadm安装Kubernetes v1.10以及常见问题解答http://blog.51cto.com/devingeng/2096495?from=singlemessageCentOS 7.4 安装 K8S v1.11.0...

2018-08-19 10:38:31 8282

转载 kafka启动使用jmx支持远程连接

sudo KAFKA_JMX_OPTS="-Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=10.0.0.109 -Djava.net.p...

2018-07-09 15:45:22 2868 1

转载 intellij 格式化代码参考

Setting -> Editor -> File and Code Templates -> Files -> Class Settings -> Edito -> Live Templates -> 参考地址1：https://blog.youkuaiyun.com/u014044812/article/details/76577479参考地址2：https://...

2018-07-03 17:02:21 1243

转载 Java分布式跟踪系统Zipkin（八）：Zipkin源码分析-KafkaCollector

所有博文均在个人独立博客http://blog.mozhu.org首发，欢迎访问！前面几篇博文中，都是使用OkHttpSender来上报Trace信息给Zipkin，这在生产环境中，当业务量比较大的时候，可能会成为一个性能瓶颈，这一篇博文我们来使用KafkaSender将Trace信息先写入到Kafka中，然后Zipkin使用KafkaCollector从Kafka中收集Span信息。在Brave...

2018-06-30 10:35:16 573

转载 java.lang.IllegalArgumentException: Prometheus requires that all meters with the same name have the

JSYK. Custom servers are not supported since 2.7.x. @EnableZipkinServer is deprecated. Please use one of the supported binary release directly or use the Docker version.转自:https://github.com/openzipki...

2018-06-30 10:33:49 2787

转载 kafka学习推荐

https://www.cnblogs.com/huxi2b/

2018-06-24 10:24:53 1815

转载 kafka如何修改复制factor

How do I change RF using Kafka managerI think it's possible to increase the replication for a topic after creationhttps://cwiki.apache.org/confluence/display/KAFKA/Replication+toolshttps://kafka.apach...

2018-06-23 11:52:18 1449

转载 No JMX Port Error

No JMX Port Error one can also add the following line to bin/kafka-server-start.sh.export JMX_PORT=${JMX_PORT:-9999}env JMX_PORT=9999 bin/kafka-server-start.sh /Users/JaideepsinhGohil/Apache/kafka_2.1...

2018-06-23 11:29:07 663

转载 spring cloud学习网站

Spring boot2.0、SpringCloud(Eureka、Config、Feign、ribbon、Sleuth、GateWay&Zuul)、Swagger2整合源码例子：https://github.com/piomin/sample-spring-microservices-new整合源码说明：http://www.itrator.top/quick-guide-to-micr...

2018-06-20 21:43:53 370

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