淘宝网页设计代码/众志seo

问题描述

使用StreamLoad写入Starrocks报错，报这个错误:Caused by: org.apache.http.ProtocolException: Content-Length header already present

代码案例

引入依赖

        <!--  Starrocks使用StreamLoad发送Http请求   --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.3</version></dependency>

具体demo

package com.song.starrocks;import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpHeaders;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultRedirectStrategy;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.UUID;public class StarRocksStreamLoad {private final static String STARROCKS_HOST = "localhost";private final static String STARROCKS_DB = "starrocks_demo";private final static String STARROCKS_TABLE = "bitmap02";private final static String STARROCKS_USER = "root";private final static String STARROCKS_PASSWORD = "";private final static int STARROCKS_HTTP_PORT = 8038;public void sendData(String content) throws Exception {//String yyyyy = "id,name,age,age=to_bitmap(age)";String yyyyy = "id,process_time,bkey,bvalue,bvalue=to_bitmap(bvalue),create_time";final String loadUrl = String.format("http://%s:%s/api/%s/%s/_stream_load",STARROCKS_HOST,STARROCKS_HTTP_PORT,STARROCKS_DB,STARROCKS_TABLE);final HttpClientBuilder httpClientBuilder = null;int TIMEOUT = 3000;try (CloseableHttpClient client = httpClientBuilder.build()) {HttpPut put = new HttpPut(loadUrl);RequestConfig build = RequestConfig.custom().setAuthenticationEnabled(true).setCircularRedirectsAllowed(true).setRedirectsEnabled(true).setRelativeRedirectsAllowed(true).setExpectContinueEnabled(true).setConnectTimeout(30000).setConnectionRequestTimeout(TIMEOUT).setSocketTimeout(TIMEOUT).build();put.setConfig(build);StringEntity entity = new StringEntity(content, "UTF-8");put.setHeader(HttpHeaders.EXPECT, "100-continue");put.setHeader(HttpHeaders.AUTHORIZATION, basicAuthHeader(STARROCKS_USER, STARROCKS_PASSWORD));put.setHeader("columns", yyyyy);put.setHeader("column_separator", "\t");put.setHeader("max_filter_ratio", "0.2");put.setHeader("label", UUID.randomUUID().toString());put.setEntity(entity);try (CloseableHttpResponse response = client.execute(put)) {String loadResult = "";if (response.getEntity() != null) {loadResult = EntityUtils.toString(response.getEntity());}final int statusCode = response.getStatusLine().getStatusCode();// statusCode 200 just indicates that starrocks be service is ok, not stream load// you should see the output content to find whether stream load is successif (statusCode != 200) {throw new IOException(String.format("Stream load failed, statusCode=%s load result=%s", statusCode, loadResult));}System.out.println("data {}" + loadResult);}}}private String basicAuthHeader(String username, String password) {final String tobeEncode = username + ":" + password;byte[] encoded = Base64.encodeBase64(tobeEncode.getBytes(StandardCharsets.UTF_8));return "Basic " + new String(encoded);}}

测试类

注意:因为ExtRoaringBitmap是自己封装的，所以需要换成bitmap或者RortingBitmap

    @Testpublic void testBitMapWriteStarrocks() throws Exception {ExtRoaringBitmap extRoaringBitmap = new ExtRoaringBitmap();extRoaringBitmap.set(111111);LongIterator longIterator = extRoaringBitmap.longIterator();StringBuilder stringBuilder = new StringBuilder();while (longIterator.hasNext()) {// 生成idLong id = 100;// 获取ExtRoaringBitmap中的具体数据，也就是获取long类型的offsetlong bitmapValue = longIterator.next();Date date = new Date();String currentDate = sdf.format(date);String bitmapKey = "张三" + id;String oneRow = id + "\t" + currentDate + "\t" + bitmapKey + "\t" + bitmapValue + "\t" + currentDate + "\n";stringBuilder.append(oneRow);}stringBuilder.deleteCharAt(stringBuilder.length() - 1);String loadData = stringBuilder.toString();System.out.println("loadData :{} " + loadData);StarRocksStreamLoad starrocksStreamLoad = new StarRocksStreamLoad();starrocksStreamLoad.sendData(loadData);}

报错截图

分析错误原因

     因为代码执行是在一个父项目中调用的子项目，把写入Starrocks这块封装为一个工具类，通过其他的项目来调用， 如果个给Starrocks单独一个项目的话，是可以正常执行的 ， 一旦放入到整个项目中，通过其他的项目来进行调用，就会报错，经过排查 ，错误的原因是因为父项目中也有用到依赖httpclient这个依赖，但是版本不是4.5.3的，是其他的版本 ，虽然我子项目中有这个httpclient4.5.3的依赖，但是在项目启动的时候，父项目的依赖把子项目的依赖覆盖了，导致无法使用httpclient4.5.3的依赖，所以项目一直报Caused by: org.apache.http.ProtocolException: Content-Length header already present。

解决办法

1.在idea中安装maven的插件:Maven Helper ,通过这个可以查到里面所有的依赖;
2.在父项目中也添加这个httpclient4.5.3的依赖就可以正常写入数据了;