Java 没有找到段*文件
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no segments* file found
提问by crazyaboutliv
I need to access a lucene index ( created by crawling several webpages using Nutch) but it is giving the error shown above :
我需要访问一个 lucene 索引（通过使用 Nutch 抓取多个网页创建），但它给出了上面显示的错误：
java.io.FileNotFoundException: no segments* file found in org.apache.lucene.store.FSDirectory@/home/<path>: files:
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:516)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:185)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:148)
at DictionaryGenerator.generateDict(DictionaryGenerator.java:24)
at DictionaryGenerator.main(DictionaryGenerator.java:56)
I googled but the reasons given were not matching the requirements.
The fact that files are being shown ( the path) probably means that the directory is not empty.
Thanks
我用谷歌搜索，但给出的原因与要求不符。显示文件（路径）的事实可能意味着目录不为空。
谢谢
采纳答案by Yuval F
Basically, the error message says that Lucene did not find the proper files in the index directory. I suggest checking the following:
基本上，错误消息表明 Lucene 在索引目录中没有找到正确的文件。我建议检查以下内容：
- Verify the path of the index directory fits what you think it should be.
- Do the Nutch and Lucene versions used match? This may stem from a version difference.
- Is there a permissions issue? Can you read the files in the directory?
- Try looking at the index using Luke. If you cannot, there is probably some corruption in the index.
- 验证索引目录的路径是否符合您的预期。
- 使用的 Nutch 和 Lucene 版本是否匹配？这可能源于版本差异。
- 是否存在权限问题？你能读取目录中的文件吗？
- 尝试使用Luke查看索引。如果不能，则索引中可能存在一些损坏。
If all these do not help, Please post the indexing part of the code.
如果所有这些都没有帮助，请发布代码的索引部分。
回答by nir
Another hint, as I was having the same error and found that after creating indexes I did not close IndexWriter and it proved very unforgiven. In my indexdirectory I have some .lock files and no segments or segments.gen files which is what Reader is looking for. See here#3 for details
另一个提示，因为我遇到了同样的错误，并发现在创建索引后我没有关闭 IndexWriter，事实证明这是非常不可原谅的。在我的索引目录中，我有一些 .lock 文件，但没有 Reader 正在寻找的段或段 .gen 文件。详情请看这里#3
