java - ElasticSearch JavaAPI (SearchScroll)-search_context_missing_exception","reason":"No search context found for id

Question

我正在使用 searchScroll 从一个索引中获取超过 100k 文档，并在所有 100K 文档中再添加一个字段。然后再次将这些文档插入到另一个新索引中。

我正在使用SearchScroll API，同时正在设置大小searchSourceBuilder.size(100)，我已将大小增加到searchSourceBuilder.size(1000)。在这两种情况下，处理 18100 文档(当 searchSourceBuilder.size(100) 时)和 21098 文档(当 searchSourceBuilder.size(1000) 时)后都会出现以下错误。

search_context_missing_exception","re​​ason":"找不到 id 的搜索上下文

并且，错误在这一行抛出 searchResponse = SearchEngineClient.getInstance().searchScroll(scrollRequest);

请找到我完整的错误堆栈

Exception in thread "main" ElasticsearchStatusException[Elasticsearch exception
[type=search_phase_execution_exception, reason=all shards failed]]; nested: Elas
ticsearchException[Elasticsearch exception [type=search_context_missing_exceptio
n, reason=No search context found for id [388]]];
        at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestR
esponse.java:177)
        at org.elasticsearch.client.RestHighLevelClient.parseEntity(RestHighLeve
lClient.java:573)
        at org.elasticsearch.client.RestHighLevelClient.parseResponseException(R
estHighLevelClient.java:549)
        at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighL
evelClient.java:456)
        at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEn
tity(RestHighLevelClient.java:429)
        at org.elasticsearch.client.RestHighLevelClient.searchScroll(RestHighLev
elClient.java:387)
        at com.es.utility.DocumentIndex.main(DocumentIndex.java:101)
        Suppressed: org.elasticsearch.client.ResponseException: method [GET], ho
st [http://localhost:9200], URI [/_search/scroll], status line [HTTP/1.1 404 Not
 Found]
{"error":{"root_cause":[{"type":"search_context_missing_exception","reason":"No
search context found for id [390]"},{"type":"search_context_missing_exception","
reason":"No search context found for id [389]"},{"type":"search_context_missing_
exception","reason":"No search context found for id [392]"},{"type":"search_cont
ext_missing_exception","reason":"No search context found for id [391]"},{"type":
"search_context_missing_exception","reason":"No search context found for id [388
]"}],"type":"search_phase_execution_exception","reason":"all shards failed","pha
se":"query","grouped":true,"failed_shards":[{"shard":-1,"index":null,"reason":{"
type":"search_context_missing_exception","reason":"No search context found for i
d [390]"}},{"shard":-1,"index":null,"reason":{"type":"search_context_missing_exc
eption","reason":"No search context found for id [389]"}},{"shard":-1,"index":nu
ll,"reason":{"type":"search_context_missing_exception","reason":"No search conte
xt found for id [392]"}},{"shard":-1,"index":null,"reason":{"type":"search_conte
xt_missing_exception","reason":"No search context found for id [391]"}},{"shard"
:-1,"index":null,"reason":{"type":"search_context_missing_exception","reason":"N
o search context found for id [388]"}}],"caused_by":{"type":"search_context_miss
ing_exception","reason":"No search context found for id [388]"}},"status":404}
                at org.elasticsearch.client.RestClient$1.completed(RestClient.ja
va:357)
                at org.elasticsearch.client.RestClient$1.completed(RestClient.ja
va:346)
                at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.
java:119)
                at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerI
mpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:177)
                at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.process
Response(HttpAsyncRequestExecutor.java:436)
                at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputRe
ady(HttpAsyncRequestExecutor.java:326)
                at org.apache.http.impl.nio.DefaultNHttpClientConnection.consume
Input(DefaultNHttpClientConnection.java:265)
                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)
                at java.lang.Thread.run(Unknown Source)
Caused by: ElasticsearchException[Elasticsearch exception [type=search_context_m
issing_exception, reason=No search context found for id [388]]]
        at org.elasticsearch.ElasticsearchException.innerFromXContent(Elasticsea
rchException.java:490)
        at org.elasticsearch.ElasticsearchException.fromXContent(ElasticsearchEx
ception.java:406)
        at org.elasticsearch.ElasticsearchException.innerFromXContent(Elasticsea
rchException.java:435)
        at org.elasticsearch.ElasticsearchException.failureFromXContent(Elastics
earchException.java:594)
        at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestR
esponse.java:169)
        ... 6 more

请找到我的java代码:

public class DocumentIndex {

    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(100); 
        searchRequest.source(searchSourceBuilder);

        SearchResponse searchResponse = SearchEngineClient.getInstance().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 = SearchEngineClient.getInstance().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 = SearchEngineClient.getInstance2().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.....");

    }

}

我使用的是 ES 6.2.3 版本

Answer 1

您收到该错误是因为您的搜索上下文在获取和处理所有结果之前已失效，因此为了解决此问题，您应该使搜索上下文保持更长时间的 Activity 。请引用Keeping the search context alive 。

增加滚动的时间值(value)。

new Scroll(TimeValue.timeValueMinutes(new_value));

将 new_value 增加到适合您的要求的值。