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dunwudunwu
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update docs
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‎assets/Java业务问题.xmind

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‎assets/TroubleShooting.eddx

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‎assets/TroubleShooting.xmind

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‎codes/deadloop/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.2.1.RELEASE</version>
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</parent>
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<groupId>io.github.dunwu.trouble</groupId>
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<artifactId>deadloop</artifactId>
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<packaging>war</packaging>
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<name>故障诊断2</name>
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<description>故障诊断示例源码2</description>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-jdbc</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>io.github.dunwu</groupId>
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<artifactId>dunwu-tool-core</artifactId>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.httpcomponents</groupId>
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<artifactId>httpclient</artifactId>
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<version>4.5.9</version>
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</dependency>
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<dependency>
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<groupId>org.apache.httpcomponents</groupId>
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<artifactId>fluent-hc</artifactId>
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<version>4.5.9</version>
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</dependency>
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</dependencies>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.github.dunwu</groupId>
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<artifactId>dunwu-dependencies</artifactId>
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<version>0.5.7</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<build>
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<finalName>${project.artifactId}</finalName>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎codes/deadloop/src/main/java/io/github/dunwu/trouble/FooService.java

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package io.github.dunwu.trouble;
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import org.springframework.stereotype.Component;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.IntStream;
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@Component
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public class FooService {
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List<String> data = new ArrayList<>();
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public void oom() {
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data.add(IntStream.rangeClosed(1, 100000)
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.mapToObj(__ -> "a")
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.collect(Collectors.joining("")));
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}
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}

‎codes/deadloop/src/main/java/io/github/dunwu/trouble/OOMApplication.java

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package io.github.dunwu.trouble;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import java.lang.management.ManagementFactory;
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import java.util.Arrays;
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import java.util.concurrent.TimeUnit;
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import java.util.stream.Collectors;
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/**
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* 启动参数：
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* <p>
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* java -verbose:gc -Xms128M -Xmx256M -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps
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* -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -Dcom.sun.management.jmxremote=true
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* -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
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* -Djava.rmi.server.hostname=172.22.6.43 -Dcom.sun.management.jmxremote.port=18888 -Xdebug -Xnoagent
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* -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=28888,server=y,suspend=n -jar deadloop.war
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*/
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@Slf4j
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@SpringBootApplication
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public class OOMApplication implements CommandLineRunner {
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private final FooService fooService;
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public OOMApplication(FooService fooService) {
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this.fooService = fooService;
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}
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public static void main(String[] args) {
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SpringApplication.run(OOMApplication.class, args);
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}
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@Override
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public void run(String... args) throws Exception {
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log.info("VM options");
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log.info(ManagementFactory.getRuntimeMXBean()
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.getInputArguments()
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.stream()
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.collect(Collectors.joining(System.lineSeparator())));
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log.info("Program arguments");
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log.info(Arrays.stream(args).collect(Collectors.joining(System.lineSeparator())));
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while (true) {
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fooService.oom();
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try {
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TimeUnit.SECONDS.sleep(3);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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}

‎codes/deadloop/src/main/resources/application.properties

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server.port = 8888
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#server.port = ${random.int[1024,65536]}
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spring.datasource.url = jdbc:mysql://172.22.6.9:3316/trouble_shooting?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
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#spring.datasource.url = jdbc:mysql://172.22.6.9:3316/trouble_shooting?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true
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spring.datasource.driver-class-name = com.mysql.cj.jdbc.Driver
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spring.datasource.username = root
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spring.datasource.password = 604330436
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# 强制每次启动使用 sql 初始化数据，本项目仅为了演示方便，真实环境应避免这种模式
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spring.datasource.initialization-mode = ALWAYS
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spring.datasource.schema = classpath:sql/schema.sql
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spring.datasource.data = classpath:sql/data.sql

‎codes/deadloop/src/main/resources/banner.txt

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${AnsiColor.BRIGHT_YELLOW}${AnsiStyle.BOLD}
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________ ___ ___ ________ ___ __ ___ ___
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|\ ___ \|\ \|\ \|\ ___ \|\ \ |\ \|\ \|\ \
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\ \ \_|\ \ \ \\\ \ \ \\ \ \ \ \ \ \ \ \ \\\ \
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\ \ \ \\ \ \ \\\ \ \ \\ \ \ \ \ __\ \ \ \ \\\ \
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\ \ \_\\ \ \ \\\ \ \ \\ \ \ \ \|\__\_\ \ \ \\\ \
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\ \_______\ \_______\ \__\\ \__\ \____________\ \_______\
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\|_______|\|_______|\|__| \|__|\|____________|\|_______|
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${AnsiColor.CYAN}${AnsiStyle.BOLD}
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:: Java :: (v${java.version})
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:: Spring Boot :: (v${spring-boot.version})
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${AnsiStyle.NORMAL}

‎codes/deadloop/src/main/resources/logback.xml

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<?xml version="1.0" encoding="UTF-8" ?>
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<configuration scan="true" scanPeriod="60 seconds" debug="false">
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<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>%d{HH:mm:ss.SSS} [%boldYellow(%thread)] [%highlight(%-5level)] %boldGreen(%c{36}.%M) - %boldBlue(%m%n)
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</pattern>
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</encoder>
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</appender>
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<root level="INFO">
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<appender-ref ref="CONSOLE" />
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</root>
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</configuration>

‎codes/deadloop/src/main/resources/sql/data.sql

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-- -------------------------------------------------------------------
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-- 运行本项目的初始化 DML 脚本
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-- Mysql 知识点可以参考：
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-- https://dunwu.github.io/db-tutorial/#/sql/mysql/README
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-- -------------------------------------------------------------------
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# INSERT INTO user (username, password, email)
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# VALUES ('admin', '$2a$10$Y9uV9YjFuNlATDGz5MeTZeuo8LbebbpP6jRgtZYQcgiCZRlf8rJYG', '[email protected]');
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#
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# INSERT INTO user (username, password, email)
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# VALUES ('user', '$2a$10$Y9uV9YjFuNlATDGz5MeTZeuo8LbebbpP6jRgtZYQcgiCZRlf8rJYG', '[email protected]');

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