最近需要对es集群定时进行索引的segment合并，使用java 的restClientAPI进行操作，对于一些大索引进行合并时，默认的连接时间肯定是不够的，导致请求超时。这里整理并记录一下。
- es版本：7.4
- es LOW RestClientAPI 7.4
在JAVA中使用elasticsearch的RestClient API合并es大索引的segment时，出现TimeoutException。
ERROR [https-jsse-nio-443-exec-4] 2020-07-09 23:31:54 (EsMiniDaansouDataInfoWithBLOBsUtil.java:80) java.net.SocketTimeoutException: 30,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE] at org.elasticsearch.client.RestClient.extractAndWrapCause(RestClient.java:808) at org.elasticsearch.client.RestClient.performRequest(RestClient.java:248) at org.elasticsearch.client.RestClient.performRequest(RestClient.java:235) at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1611) at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1581) at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1551) at org.elasticsearch.client.RestHighLevelClient.bulk(RestHighLevelClient.java:531) at cn.dxszxw.elasticsearch.esUtils.EsMiniDaansouDataInfoWithBLOBsUtil.increaseEsData(EsMiniDaansouDataInfoWithBLOBsUtil.java:76) at cn.dxszxw.controller.ElasticsearchController.createMiniDaansouDataInfoWithBLOBsAllIndexByRange(ElasticsearchController.java:146) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) at org.springframework.web.servlet.frameworkServlet.processRequest(frameworkServlet.java:1006) at org.springframework.web.servlet.frameworkServlet.doGet(frameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at org.springframework.web.servlet.frameworkServlet.service(frameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.Authenticatorbase.invoke(Authenticatorbase.java:541) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.apache.catalina.core.StandardEnginevalve.invoke(StandardEnginevalve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) at org.apache.tomcat.util.net.SocketProcessorbase.run(SocketProcessorbase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: java.net.SocketTimeoutException: 30,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE] at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.timeout(HttpAsyncRequestExecutor.java:387) at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:92) at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:39) at org.apache.http.impl.nio.reactor.AbstractIODispatch.timeout(AbstractIODispatch.java:175) at org.apache.http.impl.nio.reactor.baseIOReactor.sessionTimedOut(baseIOReactor.java:261) at org.apache.http.impl.nio.reactor.AbstractIOReactor.timeoutCheck(AbstractIOReactor.java:502) at org.apache.http.impl.nio.reactor.baseIOReactor.validate(baseIOReactor.java:211) at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280) at org.apache.http.impl.nio.reactor.baseIOReactor.execute(baseIOReactor.java:104) at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ... 1 more解决方法：
所以我们将之前的初始化RestClient的代码做了如下的修改，相关代码如下：
public static final int DEFAULT_CONNECT_TIMEOUT_MILLIS = 10000;
public static final int DEFAULT_SOCKET_TIMEOUT_MILLIS = 300000;
public static final int DEFAULT_CONNECT_REQUEST_TIMEOUT_MILLIS = 1000;
public static RestClient createConnect () {
RestClient restClient = RestClient.builder(
new HttpHost(hostname, port, ELASTICSEARCH_SCHEMA.HTTP.getSchema())).
setRequestConfigCallback(new RestClientBuilder.RequestConfigCallback() {
@Override
public RequestConfig.Builder customizeRequestConfig(RequestConfig.Builder requestConfigBuilder) {
requestConfigBuilder.setConnectTimeout(DEFAULT_CONNECT_TIMEOUT_MILLIS);
requestConfigBuilder.setSocketTimeout(DEFAULT_SOCKET_TIMEOUT_MILLIS);
requestConfigBuilder.setConnectionRequestTimeout(DEFAULT_CONNECT_REQUEST_TIMEOUT_MILLIS);
return requestConfigBuilder;
}
}).build();
return restClient;
}
参考文章：https://blog.csdn.net/wangweislk/article/details/78839384
