pymongo.errors.BulkWriteError：发生批量操作错误（MongoDB 3.4.2、pymongo 3.4.0、python 2.7.13）

我正在迁移数亿条该格式的推文{'id_str': , 'created_at': , 'text': }使用 pymongo 将文本文件转换为 MongoDB。为每个用户创建一个集合来存储他/她的推文。我使用的插入方法是insert_many()。常常会遇到BulkWriteError.

Traceback (most recent call last):
  File "pipeline.py", line 105, in <module>
    timeline_db, meta_db, negative_db, log_col, dir_path)
  File "/media/haitao/Storage/twitter_pipeline/migrate_old.py", line 134, in migrate_dir
    timeline_db[user_id].insert_many(utility.temporal_sort(statuses))
  File "/home/haitao/anaconda3/envs/py27/lib/python2.7/site-packages/pymongo/collection.py", line 711, in insert_many
    blk.execute(self.write_concern.document)
  File "/home/haitao/anaconda3/envs/py27/lib/python2.7/site-packages/pymongo/bulk.py", line 493, in execute
    return self.execute_command(sock_info, generator, write_concern)
  File "/home/haitao/anaconda3/envs/py27/lib/python2.7/site-packages/pymongo/bulk.py", line 331, in execute_command
    raise BulkWriteError(full_result)
pymongo.errors.BulkWriteError: batch op errors occurred

当存在重复的键时似乎会发生此错误，但此处不应出现这种情况。我还可以检查其他事项来解决此问题吗？

提前致谢！

抱歉耽搁了。

1）我复制了这个错误。下面是接近尾声的内容mongod.log.

I -        [ftdc] Assertion: 13538:couldn't open [/proc/5774/stat] errno:24 Too many open
files
W FTDC     [ftdc] Uncaught exception in 'Location13538: couldn't open [/proc/5774/stat] 
errno:24 Too many open files' in full-time diagnostic data capture subsystem. Shutting down 
the full-time diagnostic data capture subsystem.
E STORAGE  [conn2] WiredTiger (24) [1491020356:127332][5774:0x7f6f30e9d700], WT_SESSION
.create: /var/lib/mongodb/: directory-sync: open: Too many open files
I COMMAND  [conn2] command timeline_db.231731006 command: insert { insert: "231731006", 
ordered: true, documents: 1000 } ninserted:0 keyUpdates:0 writeConflicts:0 exception: 24: 
Too many open files code:8 numYields:0 reslen:123 locks:{ Global: { acquireCount: { r: 2, 
w: 2 } }, Database: { acquireCount: { w: 1, W: 1 } }, Collection: { acquireCount: { w: 1, 
W: 1 } } } protocol:op_query 511ms```

2) 是的，只有一个实例MongoClient()被传递。

3) 没有运行多重处理。

在我发布最初的问题后，我开始使用insert_one()这明确引发了打开文件限制错误。我改变了数据库的设计（主要是减少了集合数量）并解决了打开文件限制的问题。我不确定，但日志似乎表明实际原因BulkWriteError也是打开文件限制。