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https://issues.apache.org/jira/browse/ARROW-4825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pearu Peterson reassigned ARROW-4825:
-------------------------------------
Assignee: Pearu Peterson
> [Python][C++] MemoryPool is destructed before deallocating its buffers leads
> to segfault
> -----------------------------------------------------------------------------------------
>
> Key: ARROW-4825
> URL: https://issues.apache.org/jira/browse/ARROW-4825
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Python
> Affects Versions: 0.13.0
> Reporter: Pearu Peterson
> Assignee: Pearu Peterson
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Consider the following test function:
> ```
> def test_memory_pool():
> import pyarrow as pa
> pool = pa.logging_memory_pool(pa.default_memory_pool())
> buf = pa.allocate_buffer(10, memory_pool=pool)
> ```
> that will fail with segfault when `pool` is garbage collected before `buf`.
> However, the following test function succeeds:
> ```
> def test_memory_pool():
> import pyarrow as pa
> pool = pa.logging_memory_pool(pa.default_memory_pool())
> buf = pa.allocate_buffer(10, memory_pool=pool)
> del buf
> ```
> because all buffers are freed before `pool` destruction.
> To fix this issue, the pool instance should be attached to buffer instances
> that the pool is creating. This will ensure that `pool` will be alive until
> all its buffers are destroyed.
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