[ARROW-6740] [Python] Unable to delete closed MemoryMappedFile on Windows

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.14.1
• Fix Version/s: 0.15.1, 0.16.0
• Component/s: C++, Python
• Labels: pull-request-available
• Environment: Windows 10
• External issue URL: https://github.com/apache/arrow/issues/23081
• Assignee: Antoine Pitrou
• Reporter: Sergey Mozharov
• Created: 30/Sep/19 14:11
• Updated: 11/Jan/23 07:49
• Resolved: 30/Sep/19 22:46

Description

import os
import pyarrow as pa

# Create a file and memory-map it
file_name = 'path-to-a-new-file'
mmap = pa.create_memory_map(file_name, 100)

# or open an existing file
# file_name = 'path-to-an-existing-file'
# mmap = pa.memory_map(file_name)

# close it
mmap.close()
mmap.closed  # True

# try to delete it (can't delete until the python interpreter is killed)
os.remove(file_name)  # PermissionError

# Note: opening an existing file as `pa.input_stream` works as expected

Issue Links

• links to: GitHub Pull Request #5551