[issue45481] gc is disabled without explict calling gc.disable()

[Zachary Ware]

Change by Zachary Ware :


--
versions:  -Python 3.6

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[issue45481] gc is disabled without explict calling gc.disable()

[Eric V. Smith]

Eric V. Smith  added the comment:

Sorry, but since this is a 2.7 issue, I'm going to close it here. I know this 
isn't the answer you wanted, but this is really the wrong venue.

I suggest you ask on StackOverflow or the python-list mailing list 
(https://mail.python.org/mailman/listinfo/python-list).

Good luck!

--
nosy: +eric.smith
resolution:  -> out of date
stage:  -> resolved
status: open -> closed

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[issue45481] gc is disabled without explict calling gc.disable()

[EricLin]

New submission from EricLin :

First, I would like to clarify that this is a Python 2.7.5 issue. I know 
python2 is no longer maintained, but I still wish to look for some help here.

We have observed a long running Python 2.7.5 process leaking memory. I tried to 
inject some code into the process using gdb, to see what's happening inside.
The gdb command looks like:
gdb -p $pid -batch -eval-command='call PyGILState_Ensure()' -eval-command='call 
PyRun_SimpleString("exec(open(\"/path/to/code\").read())")' -eval-command='call 
PyGILState_Release($1)'

I printed gc.get_objects() information into a file and took 2 snapshots, but 
failed to find obvious object size increase. But after calling gc.collect() in 
the injected code, a dramatic memory decrease is observed. So I tried to print 
the return value following:

gc.isenabled()
gc.get_count()
gc.get_threshold()

which gives me:

False
(56107, 0, 0)
(700, 10, 10)

This obviously shows that gc is disabled, but I'm sure non of our code does it 
explicitly. And the same code is running on hundreds of servers but only one 
has this problem.

Does anyone have any idea what might be the cause, or what to check to find the 
root cause?

--
components: Library (Lib)
messages: 403980
nosy: linxiaojun
priority: normal
severity: normal
status: open
title: gc is disabled without explict calling gc.disable()
type: behavior
versions: Python 3.6

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