解决 Whoosh IndexingError: Writer is closed答案

【问题标题】：Resolving Whoosh IndexingError: Writer is closed解决 Whoosh IndexingError: Writer is closed
【发布时间】：2017-05-04 02:56:16
【问题描述】：

与python whoosh IndexingError when interrupted 不同，我没有中断任何提交，但IndexingError 在创建新索引时出现：

import uuid
import os

from whoosh.index import create_in
from whoosh.fields import *
from whoosh.qparser import QueryParser

schema = Schema(hashID=TEXT(stored=True))
indexdir = 'foobar'
if not os.path.exists(indexdir):
    os.mkdir(indexdir)

ix = create_in(indexdir, schema)

with ix.writer() as writer:
    writer.add_document(hashID=str(uuid.uuid4()))
    writer.commit()

错误：

---------------------------------------------------------------------------
IndexingError                             Traceback (most recent call last)
<ipython-input-1-85a42bebdce8> in <module>()
     15 with ix.writer() as writer:
     16     writer.add_document(hashID=str(uuid.uuid4()))
---> 17     writer.commit()

/usr/local/lib/python3.5/site-packages/whoosh/writing.py in __exit__(self, exc_type, exc_val, exc_tb)
    208             self.cancel()
    209         else:
--> 210             self.commit()
    211 
    212     def group(self):

/usr/local/lib/python3.5/site-packages/whoosh/writing.py in commit(self, mergetype, optimize, merge)
    918         """
    919 
--> 920         self._check_state()
    921         # Merge old segments if necessary
    922         finalsegments = self._merge_segments(mergetype, optimize, merge)

/usr/local/lib/python3.5/site-packages/whoosh/writing.py in _check_state(self)
    553     def _check_state(self):
    554         if self.is_closed:
--> 555             raise IndexingError("This writer is closed")
    556 
    557     def _setup_doc_offsets(self):

IndexingError: This writer is closed

作者应该在上下文范围内，所以我不确定为什么它是新创建的，但它被关闭了。 如何解决新索引上的 IndexingError？

【问题讨论】：

标签： python indexing file-writing whoosh readwritelock

【解决方案1】：

writer.commit() 保存更改并关闭编写器。

然后在语句的最后，with ix.writer() as writer: 尝试关闭已经关闭且不存在的 writer。

因此，您的with 语句相当于：

try:
    writer = ix.writer()
    writer.add_document(hashID=str(uuid.uuid4()))
    writer.commit()
finally:
    writer.commit()

作为一种解决方案，无论您在 with 语句中省略 writer.commit() 还是删除 with 语句并在每次要提交时重新创建 writer。

【讨论】：