这是我的示例代码：

MysqlDataSource dataSource = new MysqlDataSource();

dataSource.setUser("root");
dataSource.setPassword("ncl");
dataSource.setDatabaseName("userdb");
dataSource.setEmulateLocators(true); //This is important because we are dealing with a blob type data field
try{    
    JdbcDirectory jdbcDir = new JdbcDirectory(dataSource, new MySQLDialect(), "tttable");
    StandardAnalyzer analyzer = new StandardAnalyzer();
    IndexWriter writer = new IndexWriter(jdbcDir, analyzer,false);
    writer.optimize();
    writer.close();
}catch(Exception e){
System.out.print(e);
}

我卡在这一行： IndexWriter writer = new IndexWriter（jdbcDir，analyzer，false）;

每当我尝试运行这段代码时，我都会收到以下异常：

------"org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: PhantomReadLock[write.lock/tttable]"------------

我无法找出代码的问题。可能是它与JAR相容性的问题。

我无法获得IndexWriter对象。