基于SpringBoot解决Elasticsearch与Redis的Netty冲突问题

1、报错

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2、原因

elasticsearch和Redis都需要Netty作为NIO框架，在Redis初始化时已经对Netty进行了初始化处理器数量，当ES再次尝试初始化Netty处理器数量时，Netty就会对此进行保护措施，抛出异常

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3、解决方式

import org.elasticsearch.client.Client;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
import org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter;
import org.springframework.data.elasticsearch.core.mapping.SimpleElasticsearchMappingContext;

import javax.annotation.PostConstruct;

/**
 * Es配置
 *
 * @author yjw
 * @date 2020/8/27
 */
@Configuration
//  @AutoConfigureBefore将会在Redis类加载前加载
//  由于Redis采用的是Yaml配置的方式，没有使用配置类方式，所以采用RedisAutoConfiguration
@AutoConfigureBefore(RedisAutoConfiguration.class)
public class ElasticsearchConfig {

    //    @PostConstruct在@Bean之前执行
    @PostConstruct
    void init() {
        System.setProperty("es.set.netty.runtime.available.processors", "false");
    }

    @Bean(name = "elasticsearchTemplate")
    public ElasticsearchTemplate elasticsearchTemplate(Client client, ElasticsearchConverter converter) {
        try {
            return new ElasticsearchTemplate(client, converter);
        } catch (Exception ex) {
            throw new IllegalStateException(ex);
        }
    }

    @Bean
    public ElasticsearchConverter elasticsearchConverter(
            SimpleElasticsearchMappingContext mappingContext) {
        return new MappingElasticsearchConverter(mappingContext);
    }

    @Bean
    public SimpleElasticsearchMappingContext mappingContext() {
        return new SimpleElasticsearchMappingContext();
    }
}