Local Debug

环境
系统操作：macOS Mojave
JDK：1.12，export JAVA_HOME=$(/usr/libexec/java_home -v 1.12)
Elasticsearch版本：7.3.1
clone 源码
cd ~/es_data
git clone https://github.com/elastic/elasticsearch.git
cd elasticsearch
git checkout -b test v7.3.1
导入 idea 环境
./gradlew idea
Import Project => 选择 elasticsearch 目录 => Import project from external model (Gradle) => Use auto-import
启动方式一
# 这一步网络下载可能很慢，必要时使用代理  
# export http_proxy=http://127.0.0.1:1087
# export https_proxy=http://127.0.0.1:1087;
./gradlew run --debug-jvm
等运行到如下界面，就可以用 idea 执行 Run => Attach to process：
缺点：
启动很慢，第一次需要下载 jdk 等依赖文件；
日志窗口在 terminal，不在 debug 的 console 窗口；
优点：操作简单
启动方式二
Elasticsearch 启动类：server/src/main/java/org/elasticsearch/bootstrap/Elasticsearch，继承EnvironmentAwareCommand。
public abstract class EnvironmentAwareCommand extends Command {
    @Override
    protected void execute(Terminal terminal, OptionSet options) throws Exception {
        putSystemPropertyIfSettingIsMissing(settings, "path.data", "es.path.data");
        putSystemPropertyIfSettingIsMissing(settings, "path.home", "es.path.home");
        putSystemPropertyIfSettingIsMissing(settings, "path.logs", "es.path.logs");
    }
    
    protected Environment createEnv(final Map<String, String> settings) throws UserException {
        final String esPathConf = System.getProperty("es.path.conf");
    }
}
可以看出我们需要配置以上四个配置：
cd ~/es_data
mkdir config data logs home
​
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.3.1-darwin-x86_64.tar.gz
tar zxvf elasticsearch-7.3.1-darwin-x86_64.tar.gz
cp -R elasticsearch-7.3.1/modules home/
cp -R elasticsearch-7.3.1/plugins home/
​
cp -R elasticsearch/distribution/src/config/* config/
​
vi config/elasticsearch.yml
cluster.name: my-application
node.name: node-1
#${path.data}
#${path.logs}
​
vi config/elasticsearch.policy
grant {
  permission java.lang.RuntimePermission "createClassLoader";
};
然后在 idea 做如下配置后，运行 Elasticsearch 的 main 方法即可：
-Des.path.data=~/es_idea/data
-Des.path.home=~/es_idea/home
-Des.path.logs=~/es_idea/logs
-Des.path.conf=~/es_idea/config
-Djava.security.policy=~/es_idea/config/elasticsearch.policy
-Dlog4j2.disable.jmx=true
Last modified 3yr ago