[DISPATCH-2144] Fatal Python error: _PyMem_DebugMalloc: Python memory allocator called without holding the GIL

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.16.0
• Fix Version/s: 1.19.0
• Component/s: Policy Engine
• Assignee: Jiri Daněk
• Reporter: Jiri Daněk
• Created: 20/May/21 10:39
• Updated: 22/Mar/22 19:12
• Resolved: 01/Mar/22 14:28

Description

To reproduce, install python3-debug on Fedora, then use it to build and run Dispatch

https://github.com/jiridanek/qpid-dispatch/runs/2629007367?check_suite_focus=true#step:25:7044

25: Router QDR.Policy output file:
25: >>>>
25: /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/python/qpid_dispatch_internal/policy/policy_util.py:65: ResourceWarning: unclosed <socket.socket fd=3, family=AddressFamily.AF_INET6, type=SocketKind.SOCK_STREAM, proto=0, laddr=('::', 0, 0, 0)>
25:   if is_ipv6_enabled():
25: ResourceWarning: Enable tracemalloc to get the object allocation traceback
25: Fatal Python error: _PyMem_DebugMalloc: Python memory allocator called without holding the GIL
25: Python runtime state: initialized
25: 
25: Thread 0x00007f0e8fffcec0 (most recent call first):
25: <no Python frame>

Unrelated error in the same log that I noticed at random

23: E           /builddir/build/BUILD/Python-3.9.5/Modules/gcmodule.c:114: gc_decref: Assertion "gc_get_refs(g) > 0" failed: refcount is too small
23: E           Enable tracemalloc to get the memory block allocation traceback
23: E           
23: E           object address  : 0x7fd3e1b90cd0
23: E           object refcount : 117
23: E           object type     : 0x7b6000095c30
23: E           object type name: Agent
23: E           object repr     : <qpid_dispatch_internal.management.agent.Agent object at 0x7fd3e1b90cd0>
23: E           
23: E           Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailed
23: E           Python runtime state: initialized
23: E           
23: E           Current thread 0x00007fd3e39e3ec0 (most recent call first):
23: E           <no Python frame>