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When py3.7 test is executed for nova-powervm, it hangs and gets
timed_out. the same testcases executes fine in py3.6 env.
below exception occurs and doesnt exit from the tests.
Exception ignored in: <function _after_fork at 0x7fe220046e18>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/threading.py", line 1335, in _after_fork
assert len(_active) == 1
AssertionError:
Exception ignored in: <function _after_fork at 0x7f40f5346e18>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/threading.py", line 1335, in _after_fork
assert len(_active) == 1
AssertionError:
Exception ignored in: <function _after_fork at 0x7f2795418e18>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/threading.py", line 1335, in _after_fork
assert len(_active) == 1
AssertionError:
Exception ignored in: <function _after_fork at 0x7ff2e7d26e18>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/threading.py", line 1335, in _after_fork
assert len(_active) == 1
AssertionError:
Exception ignored in: <function _after_fork at 0x7f17debb7e18>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/threading.py", line 1335, in _after_fork
assert len(_active) == 1
AssertionError:
``````````````````````````````````````````````````````````````````````````````
def _after_fork():
"""
Cleanup threading module state that should not exist after a fork.
"""
# Reset _active_limbo_lock, in case we forked while the lock was held
# by another (non-forked) thread. http://bugs.python.org/issue874900
global _active_limbo_lock, _main_thread
_active_limbo_lock = _allocate_lock()
# fork() only copied the current thread; clear references to others.
new_active = {}
current = current_thread()
_main_thread = current
with _active_limbo_lock:
# Dangling thread instances must still have their locks reset,
# because someone may join() them.
threads = set(_enumerate())
threads.update(_dangling)
for thread in threads:
# Any lock/condition variable may be currently locked or in an
# invalid state, so we reinitialize them.
if thread is current:
# There is only one active thread. We reset the ident to
# its new value since it can have changed.
thread._reset_internal_locks(True)
ident = get_ident()
thread._ident = ident
new_active[ident] = thread
else:
# All the others are already stopped.
thread._reset_internal_locks(False)
thread._stop()
_limbo.clear()
_active.clear()
_active.update(new_active)
assert len(_active) == 1
** Affects: python3.7 (Ubuntu)
Importance: Undecided
Status: New
--
Testcases hangs : /usr/local/lib/python3.7/threading.py", line 1335, in
_after_fork
https://bugs.launchpad.net/bugs/1850289
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