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我在 Mac - El Capitan 上安装了 OrientDB V 2.1.11。我按照 OrientDB 文档的说明进行操作。 http://orientdb.com/docs/last/Import-from-DBMS.html 当我运行 oetl.sh 时，我得到一个空指针异常。我假设它正在连接到 Oracle 实例。json配置：

{
  "config": {
    "log": "error"
  },
  "extractor" : {
    "jdbc": { "driver": "oracle.jdbc.OracleDriver",
              "url": "jdbc:oracle:thin:@<dbUrl>:1521:<dbSid>",
              "userName": "username",
              "userPassword": "password",
              "query": "select sold_to_party_nbr from customer" }
  },
  "transformers" : [
   { "vertex": { "class": "Company"} }
  ],
  "loader" : {
    "orientdb": {
      "dbURL": "plocal:../databases/BetterDemo",
      "dbUser": "admin",
      "dbPassword": "admin",
      "dbAutoCreate": true
    }
  }
}

错误：

sharon.oconnor$ ./oetl.sh ../loadFromOracle.json 
OrientDB etl v.2.1.11 (build UNKNOWN@rddb5c0b4761473ae9549c3ac94871ab56ef5af2c; 2016-02-15 10:49:20+0000) www.orientdb.com
Exception in thread "main" java.lang.NullPointerException
    at com.orientechnologies.orient.etl.transformer.OVertexTransformer.begin(OVertexTransformer.java:53)
    at com.orientechnologies.orient.etl.OETLPipeline.begin(OETLPipeline.java:72)
    at com.orientechnologies.orient.etl.OETLProcessor.executeSequentially(OETLProcessor.java:465)
    at com.orientechnologies.orient.etl.OETLProcessor.execute(OETLProcessor.java:269)
    at com.orientechnologies.orient.etl.OETLProcessor.main(OETLProcessor.java:116)

Oracle 中的数据如下所示：

0000281305
0000281362
0000281378
0000281381
0000281519
0000281524
0000281563
0000281566
0000281579
0000281582
0000281623
0000281633

我在 BetterDemo 数据库中创建了一个带有 sold_to_party_nbr 字符串属性的 Company 类。

如何进一步调试以找出问题所在？

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