google-app-engine - Google App Engine : Lucene org. apache.lucene.store.LockObtainFailedException:锁定获取超时

Question

在 Google APP engine , 我正在使用 Lucene 4.1 .

我能够在本地生成索引文件，但在谷歌服务器上我收到以下异常(尽管相同的代码在本地机器上运行良好):

org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out:
   com.googlecode.lucene.appengine.GaeLockFactory$1@104a681

这是我的代码:

package com.search.domain;

import java.io.IOException;
import java.util.Set;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.util.Version;

import com.domain.dataobjects.Item;
import com.googlecode.lucene.appengine.GaeDirectory;
import com.googlecode.lucene.appengine.GaeLuceneUtil;


public class ItemDataIndexWriter {

public String createIndexes(){
    IndexWriter indexWriter = null;
    GaeDirectory indexDirectory = null;
try{    
        indexDirectory = new GaeDirectory();

        StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_41 );

        IndexWriterConfig config = GaeLuceneUtil.getIndexWriterConfig(Version.LUCENE_41, analyzer);//get configuration

        config.setOpenMode(OpenMode.CREATE_OR_APPEND);
        indexWriter = new IndexWriter(indexDirectory, config);

        addToDoc(indexWriter,"test");
 }catch(Exception e){
     e.printStackTrace();
     System.out.println(e.getMessage());
     return e.toString();
 }
 finally{
     try {
        if(indexWriter!=null)
             indexWriter.close();
        if(indexDirectory!=null)
             indexDirectory.close();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.out.println(e.getMessage());
    }        
 }
return "Good";
}


private static void addToDoc(IndexWriter w, String item) throws IOException {

    Document doc = new Document();
    doc.add(new TextField("item", item, Field.Store.YES));
    w.addDocument(doc);
}
}

任何人都可以指导我吗？怎么了？

Answer 1

只需进入 Google AppEngine administration -> Datastore viewer , 选择 GaeLock 实体并删除所有实体，这样做您将解锁因任何原因被锁定的每个 Lucene 索引。

小心!可能您的数据存储处于脏状态，因此您必须通过删除以下所有条目来手动删除索引:LuceneIndex , Segment , SegmentHunk , GaeLock .

当 Lucene AppEngine 没有正确配置时，您可能会遇到这个问题。查看 lucene-appengine site 上的配置说明.