对于该方法，使用带有Scroll API的RestHighLevelClient来获取100k文档时，出现以下错误。
Suppressed: org.apache.http.ContentTooLongException: entity content is too long
请为RestHighLevelClient
D:\Karthikeyan\ElasticSearch\ElasticSearch_Tesing\target>java -jar ElasticSearch
Utility-1.0.0-SNAPSHOT-jar-with-dependencies.jar
Jul 13, 2018 3:11:59 PM com.es.utility.DocumentIndex main
INFO: Started Indexing the Document.....
ERROR StatusLogger No log4j2 configuration file found. Using default configurati
on: logging only errors to the console. Set system property 'log4j2.debug' to sh
ow Log4j2 internal initialization logging.
Exception in thread "main" java.net.ConnectException: Connection refused: no fur
ther information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEv
ent(DefaultConnectingIOReactor.java:171)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEv
ents(DefaultConnectingIOReactor.java:145)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute
(AbstractMultiworkerIOReactor.java:348)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.exe
cute(PoolingNHttpClientConnectionManager.java:192)
at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(Cl
oseableHttpAsyncClientBase.java:64)
at java.lang.Thread.run(Unknown Source)
Suppressed: org.apache.http.ContentTooLongException: entity content is t
oo long [223328895] for the configured buffer limit [104857600]
at org.elasticsearch.client.HeapBufferedAsyncResponseConsumer.on
EntityEnclosed(HeapBufferedAsyncResponseConsumer.java:76)
at org.apache.http.nio.protocol.AbstractAsyncResponseConsumer.re final Scroll scroll = new Scroll(TimeValue.timeValueMinutes(1L)); //part of Scroll API
searchRequest.scroll(scroll); //part of Scroll API
sponseReceived(AbstractAsyncResponseConsumer.java:131)
at org.apache.http.impl.nio.client.MainClientExec.responseReceiv
ed(MainClientExec.java:315)
at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerI
mpl.responseReceived(DefaultClientExchangeHandlerImpl.java:147)
at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.respons
eReceived(HttpAsyncRequestExecutor.java:303)
at org.apache.http.impl.nio.DefaultNHttpClientConnection.consume
Input(DefaultNHttpClientConnection.java:255)
at org.apache.http.impl.nio.client.InternalIODispatch.onInputRea
dy(InternalIODispatch.java:81)
at org.apache.http.impl.nio.client.InternalIODispatch.onInputRea
dy(InternalIODispatch.java:39)
at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputRead
y(AbstractIODispatch.java:114)
at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseI
OReactor.java:162)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEve
nt(AbstractIOReactor.java:337)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEve
nts(AbstractIOReactor.java:315)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(Ab
stractIOReactor.java:276)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIO
Reactor.java:104)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor
$Worker.run(AbstractMultiworkerIOReactor.java:588)
... 1 more
因此，我尝试通过设置缓冲区大小RestClient来使用RestHighLevelClient而不是static long BUFFER_SIZE = 500 * 1024 * 1024;
但是使用RestClient不确定如何使用ScrollAPI。因为，我必须从索引中提取超过100k个文档。
请找到我的RestHighLevelClient代码
public class DocumentIndexRestHighLevelClient {
private final static String INDEX = "documents";
private final static String ATTACHMENT = "document_attachment";
private final static String TYPE = "doc";
private static final Logger logger = Logger.getLogger(Thread.currentThread().getStackTrace()[0].getClassName());
public static void main(String args[]) throws IOException {
RestHighLevelClient restHighLevelClient = null;
Document doc=new Document();
logger.info("Started Indexing the Document.....");
try {
restHighLevelClient = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
} catch (Exception e) {
System.out.println(e.getMessage());
}
//Fetching Id, FilePath & FileName from Document Index.
SearchRequest searchRequest = new SearchRequest(INDEX);
searchRequest.types(TYPE);
final Scroll scroll = new Scroll(TimeValue.timeValueMinutes(1L)); //part of Scroll API
searchRequest.scroll(scroll); //part of Scroll API
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
QueryBuilder qb = QueryBuilders.matchAllQuery();
searchSourceBuilder.query(qb);
searchSourceBuilder.size(120000);
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest);
String scrollId = searchResponse.getScrollId(); //part of Scroll API
SearchHit[] searchHits = searchResponse.getHits().getHits();
long totalHits=searchResponse.getHits().totalHits;
logger.info("Total Hits --->"+totalHits);
//part of Scroll API -- Starts
while (searchHits != null && searchHits.length > 0) {
SearchScrollRequest scrollRequest = new SearchScrollRequest(scrollId);
scrollRequest.scroll(scroll);
searchResponse = restHighLevelClient.searchScroll(scrollRequest);
scrollId = searchResponse.getScrollId();
searchHits = searchResponse.getHits().getHits();
File all_files_path = new File("d:\\All_Files_Path.txt");
File available_files = new File("d:\\Available_Files.txt");
File missing_files = new File("d:\\Missing_Files.txt");
int totalFilePath=1;
int totalAvailableFile=1;
int missingFilecount=1;
Map<String, Object> jsonMap ;
for (SearchHit hit : searchHits) {
String encodedfile = null;
File file=null;
Map<String, Object> sourceAsMap = hit.getSourceAsMap();
if(sourceAsMap != null) {
doc.setId((int) sourceAsMap.get("id"));
doc.setApp_language(String.valueOf(sourceAsMap.get("app_language")));
}
String filepath=doc.getPath().concat(doc.getFilename());
logger.info("ID---> "+doc.getId()+"File Path --->"+filepath);
try(PrintWriter out = new PrintWriter(new FileOutputStream(all_files_path, true)) ){
out.println("FilePath Count ---"+totalFilePath+":::::::ID---> "+doc.getId()+"File Path --->"+filepath);
}
file = new File(filepath);
if(file.exists() && !file.isDirectory()) {
try {
try(PrintWriter out = new PrintWriter(new FileOutputStream(available_files, true)) ){
out.println("Available File Count --->"+totalAvailableFile+":::::::ID---> "+doc.getId()+"File Path --->"+filepath);
totalAvailableFile++;
}
FileInputStream fileInputStreamReader = new FileInputStream(file);
byte[] bytes = new byte[(int) file.length()];
fileInputStreamReader.read(bytes);
encodedfile = new String(Base64.getEncoder().encodeToString(bytes));
fileInputStreamReader.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
else
{
System.out.println("Else block");
PrintWriter out = new PrintWriter(new FileOutputStream(missing_files, true));
out.println("Available File Count --->"+missingFilecount+":::::::ID---> "+doc.getId()+"File Path --->"+filepath);
out.close();
missingFilecount++;
}
jsonMap = new HashMap<>();
jsonMap.put("id", doc.getId());
jsonMap.put("app_language", doc.getApp_language());
jsonMap.put("fileContent", encodedfile);
String id=Long.toString(doc.getId());
IndexRequest request = new IndexRequest(ATTACHMENT, "doc", id )
.source(jsonMap)
.setPipeline(ATTACHMENT);
PrintStream printStream = new PrintStream(new File("d:\\exception.txt"));
try {
IndexResponse response = restHighLevelClient.index(request);
} catch(ElasticsearchException e) {
if (e.status() == RestStatus.CONFLICT) {
}
e.printStackTrace(printStream);
}
totalFilePath++;
}
}
ClearScrollRequest clearScrollRequest = new ClearScrollRequest();
clearScrollRequest.addScrollId(scrollId);
ClearScrollResponse clearScrollResponse = restHighLevelClient.clearScroll(clearScrollRequest);
boolean succeeded = clearScrollResponse.isSucceeded();
////part of Scroll API -- Ends
logger.info("Indexing done.....");
}
}
答案 0 :(得分：1)
应该将size参数设置为您希望每个滚动片而不是整个内容返回多少文档。从大约100开始，然后逐渐增加直到不再有性能提升为止。