[ARROW-13115] [Plasma][Python] plasma.PlasmaClient do not disconnect when user tried to delete it

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.0.0
• Component/s: C++ - Plasma, Python
• External issue URL: https://github.com/apache/arrow/issues/28818
• Assignee: Unassigned
• Reporter: Yuxian Meng
• Created: 18/Jun/21 09:40
• Updated: 11/Jan/23 08:31

Description

```
import pyarrow.plasma as plasma
for _ in range(10000):
c = plasma.connect("/tmp/plasma")
del c
```
The above code turns out not to call c.disconnect() automatically, and will cause `Connection to IPC socket failed` error.