[GitHub] [skywalking-python] westarest commented on pull request #246: feat: add GreenletProfiler

[GitBox <gi...@apache.org>]

westarest commented on PR #246:
URL: https://github.com/apache/skywalking-python/pull/246#issuecomment-1295203701

   there is something wrong when profiling start:
   ```
   skywalking [Thread-127] [DEBUG] profile task [1666974131787_ZTJlLXNlcnZpY2UtcHJvdmlkZXI=.1] for endpoint [/artist] started
   Traceback (most recent call last):
     File "src/gevent/_waiter.py", line 122, in gevent._gevent_c_waiter.Waiter.switch
     File "/skywalking-python/venv/lib/python3.6/site-packages/apache_skywalking-0.8.0-py3.6.egg/skywalking/profile/profile_context.py", line 329, in callback
       agent.add_profiling_snapshot(snapshot)
     File "/skywalking-python/venv/lib/python3.6/site-packages/apache_skywalking-0.8.0-py3.6.egg/skywalking/agent/__init__.py", line 288, in add_profiling_snapshot
       __snapshot_queue.put(snapshot)
     File "/usr/local/lib/python3.6/queue.py", line 126, in put
       with self.not_full:
     File "/usr/local/lib/python3.6/threading.py", line 240, in __enter__
       return self._lock.__enter__()
     File "src/gevent/_semaphore.py", line 278, in gevent._gevent_c_semaphore.Semaphore.__enter__
     File "src/gevent/_semaphore.py", line 279, in gevent._gevent_c_semaphore.Semaphore.__enter__
     File "src/gevent/_semaphore.py", line 180, in gevent._gevent_c_semaphore.Semaphore.acquire
     File "/skywalking-python/venv/lib/python3.6/site-packages/gevent/thread.py", line 121, in acquire
       acquired = BoundedSemaphore.acquire(self, blocking, timeout)
     File "src/gevent/_semaphore.py", line 180, in gevent._gevent_c_semaphore.Semaphore.acquire
     File "src/gevent/_semaphore.py", line 249, in gevent._gevent_c_semaphore.Semaphore.acquire
     File "src/gevent/_abstract_linkable.py", line 521, in gevent._gevent_c_abstract_linkable.AbstractLinkable._wait
     File "src/gevent/_abstract_linkable.py", line 487, in gevent._gevent_c_abstract_linkable.AbstractLinkable._wait_core
     File "src/gevent/_abstract_linkable.py", line 490, in gevent._gevent_c_abstract_linkable.AbstractLinkable._wait_core
     File "src/gevent/_abstract_linkable.py", line 442, in gevent._gevent_c_abstract_linkable.AbstractLinkable._AbstractLinkable__wait_to_be_notified
     File "src/gevent/_abstract_linkable.py", line 451, in gevent._gevent_c_abstract_linkable.AbstractLinkable._switch_to_hub
     File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
     File "src/gevent/_greenlet_primitives.py", line 64, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
     File "src/gevent/_greenlet_primitives.py", line 67, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch_out
     File "src/gevent/_greenlet_primitives.py", line 68, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch_out
   gevent.exceptions.BlockingSwitchOutError: Impossible to call blocking function in the event loop callback
   2022-10-28T16:22:34Z <built-in method switch of gevent._gevent_cgreenlet.Greenlet object at 0x7ff213196a48> failed with BlockingSwitchOutError
   ```


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