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I. Linux version 2. Copy and paste multiple jdks, as follows cp -R jdk1.7.0_80/ jdk1.7.0_80-2 cp -R jdk1.7.0_80/ jdk1.7.0_80-3 3. Configure multiple JDK environment variables Add the following after the / etc/profile file # JDK1 environment configuration export JAVA_HOME=/usr/local/program/jdk1.7.0_80 export JRE_HOME=$JAVA_HOME/jre export ...

order This paper mainly studies register producer and unregister producer of rocketmq MQClientInstance rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/impl/factory/MQClientInstance.java public class MQClientInstance { private final static long LOCK_TIMEOUT_MILLIS = 3000; private final InternalLogger log = ClientLogger.getL ...

For the eureka project of HongHu cloud, we do the following construction. The whole construction process is very simple. I will record every step of the construction process, hoping to help you: 1. Create a maven project named particle common Eureka and inherit the particle common service. The specific pom.xml configuration file is as follows: ...

Last blog shared mapreduce's programming ideas. In this section, the blogger will take his friends to understand the principle of wordcount program and the details of code implementation / operation. Through this section, we can have a general understanding of map reduce program. In fact, map and reduce programs in hadoop are only two of them. ...

>Original article, welcome to reprint. Reprint please indicate: reprint from IT people's story meeting Thank you!>Original link address: Building the Mesos cluster environment of "advanced" docker (24) This time, I will start to operate. First, I will install the MES. How to install the MES. Source code: https://github.com/lim ...

Learning back-end fast food for all (3) - accessing database with MyBatis In the last section, we learned the JdbcTemplate to access the database, which is much more convenient than using the original JDBC. At least you don't have to deal with a lot of exceptions.But we can still use some frameworks to make the work less. The main choice is MyB ...

Requirement: the same Tomcat Objectives: 1. Access the project under the webapp of Tomcat through the localhost / project name 2. Through www.aaa.com and www.bbb.com, visit the virtual hosts with different domain names under Tomcat I. modify the port number under the server.xml file II. Project location 3. Multi domain configu ...

Overview of Hive Hive is a Hadoop-based data warehouse tool that maps structured data files to a table and provides SQL-like query capabilities. Hive is essentially a MapReduce program that converts HQL. Data processed by Hive is stored in HDFS, and the underlying implementation of analytic data can be MapReduce, tes, or Spark, with its executo ...

Download Hive installation package from website Modify hive-site.xml (version 2.3.4 does not have this file to create directly) <?xml version="1.0" encoding="UTF-8" standalone="no"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>javax.jdo.option. ...

A simple example of using FeignClient is as follows: 1. Add maven dependency <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> <version>2.0.2.RELEASE</version> </dependency> <dependency> <groupId& ...