spring boot整合elasticsearch，

啟動報錯：

Caused by: java.lang.IllegalStateException: availableProcessors is already set to [8], rejecting [8]
    at io.netty.util.NettyRuntime$AvailableProcessorsHolder.setAvailableProcessors(NettyRuntime.java:51) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
    at io.netty.util.NettyRuntime.setAvailableProcessors(NettyRuntime.java:
 
87) ~[netty-common-4.1.23.Final.jar:4.1.23.Final]
    at org.elasticsearch.transport.netty4.Netty4Utils.setAvailableProcessors(Netty4Utils.java:85) ~[transport-netty4-client-5.6.8.jar:5.6.8]
    at org.elasticsearch.transport.netty4.Netty4Transport.<init>(Netty4Transport.java:140) ~[transport-netty4-client-5.6
 
.8.jar:5.6.8]
    at org.elasticsearch.transport.Netty4Plugin.lambda$getTransports$0(Netty4Plugin.java:93) ~[transport-netty4-client-5.6.8.jar:5.6.8]
    at org.elasticsearch.client.transport.TransportClient.buildTemplate(TransportClient.java:177) ~[elasticsearch-5.6.8.jar:5.6.8]
    at org.elasticsearch.client.transport.TransportClient.
 
<init>(TransportClient.java:268) ~[elasticsearch-5.6.8.jar:5.6.8]
    at org.elasticsearch.transport.client.PreBuiltTransportClient.<init>(PreBuiltTransportClient.java:133) ~[transport-5.6.8.jar:5.6.8]
    at org.elasticsearch.transport.client.PreBuiltTransportClient.<init>(PreBuiltTransportClient.java:119) ~[transport-5.6.8.jar:5.6.8]
    at org.elasticsearch.transport.client.PreBuiltTransportClient.<init>(PreBuiltTransportClient.java:109) ~[transport-5.6.8.jar:5.6.8]
    at org.springframework.data.elasticsearch.client.TransportClientFactoryBean.buildClient(TransportClientFactoryBean.java:91) ~[spring-data-elasticsearch-3.0.6.RELEASE.jar:3.0.6.RELEASE]
    at org.springframework.data.elasticsearch.client.TransportClientFactoryBean.afterPropertiesSet(TransportClientFactoryBean.java:86) ~[spring-data-elasticsearch-3.0.6.RELEASE.jar:3.0.6.RELEASE]
    at org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration.elasticsearchClient(ElasticsearchAutoConfiguration.java:59) ~[spring-boot-autoconfigure-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration$$EnhancerBySpringCGLIB$$13fe0eee.CGLIB$elasticsearchClient$0(<generated>) ~[spring-boot-autoconfigure-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration$$EnhancerBySpringCGLIB$$13fe0eee$$FastClassBySpringCGLIB$$480cb39c.invoke(<generated>) ~[spring-boot-autoconfigure-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchAutoConfiguration$$EnhancerBySpringCGLIB$$13fe0eee.elasticsearchClient(<generated>) ~[spring-boot-autoconfigure-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_171]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_171]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_171]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_171]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    ... 24 common frames omitted

解決方案：

在啟動類新增

@EnableScheduling
@SpringBootApplication
@MapperScan("com.sxd.swapping.dao.mybatis")
public class SwappingApplication {

    public static void main(String[] args) {
        /**
         * Springboot整合Elasticsearch 在專案啟動前設定一下的屬性，防止報錯
         * 解決netty衝突後初始化client時還會丟擲異常
         * java.lang.IllegalStateException: availableProcessors is already set to [4], rejecting [4]
         */
        System.setProperty("es.set.netty.runtime.available.processors", "false");
        SpringApplication.run(SwappingApplication.class, args);
    }
}