两机器两分片 （异步驱动）导入A表 2亿数据时（45分钟左右）频繁出现此问题

Couldn’t get a connection
within the time limit of 784ms’, details={}}, BulkWriteError{index=4564,
code=202, message=’Write results unavailable from 192.168.1.78:270
03 :: caused by :: Couldn’t get a connection within the time limit of 784
ms’, details={}}, BulkWriteError{index=4565, code=202, message=’Writ
e results unavailable from 192.168.1.78:27003 :: caused by :: Couldn’t
get a connection within the time limit of 784ms’, details={}}, BulkWriteE
rror{index=4566, code=202, message=’Write results unavailable from
192.168.1.78:27003 :: caused by :: Couldn’t get a connection within the
time limit of 784ms’, details={}}, BulkWriteError{index=4567, code=20
2, message=’Write results unavailable from 192.168.1.78:27003 :: caus
ed by :: Couldn’t get a connection within the time limit of 784ms’, detail
s={}}, BulkWriteError{index=4568, code=202, message=’Write results u
navailable from 192.168.1.78:27003 :: caused by :: Couldn’t get a conn
ection within the time limit of 784