Hello. I'm having trouble reading an exception log on my app.
Quick background:
- request was made by taskqueue
- request creates several dozen tasklets that have this code path:
(module/function names simplified):
mycode3.py:234 myFunc3()
--> mycode2.py:64 myFunc2()
--> mycode1.py:37 myFunc1
myFunc1 is yielding on async urlfetch; line 37 is the
@ndb.tasklet decorator
- taskqueue was configured to re-try 2 more times, which it
did, each failing in exactly the same way
Actual log:
2012-10-29 08:36:59.649 initial generator myFunc1(mycode1.py:37) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.654 initial generator myFunc1(mycode1.py:37) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.655 suspended generator myFunc2(mycode2.py:64) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.665 initial generator myFunc1(mycode1.py:37) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.669 initial generator myFunc1(mycode1.py:37) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.670 suspended generator myFunc2(mycode2.py:64) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.674 initial generator myFunc1(mycode1.py:37) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:36:59.674 suspended generator myFunc2(mycode2.py:64) raised
RuntimeError(maximum recursion depth exceeded)
W 2012-10-29 08:37:00.658 suspended generator myFunc3(mycode3:234) raised
RuntimeError(maximum recursion depth exceeded)
E 2012-10-29 08:37:04.055
Exception: Deadlock waiting for <Future b36ce4ec0b0cf118 created by
__call__(_webapp25.py:712) for tasklet flush(context.py:239); pending>
Traceback (most recent call last):
File
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/_webapp25.py",
line 712, in __call__
handler.post(*groups)
File
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/ndb/tasklets.py",
line 1050, in add_context_wrapper
ctx.flush().check_success()
File
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/ndb/tasklets.py",
line 322, in check_success
raise self._exception.__class__, self._exception, self._traceback
RuntimeError: Deadlock waiting for <Future b36ce4ec0b0cf118 created by
__call__(_webapp25.py:712) for tasklet flush(context.py:239); pending>
E 2012-10-29 08:37:04.086 Traceback (most recent call last):
E 2012-10-29 08:37:04.086 File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/app_logging.py",
line 98, in emit
E 2012-10-29 08:37:04.086 Traceback (most recent call last):
E 2012-10-29 08:37:04.086 File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/app_logging.py",
line 91, in emit
E 2012-10-29 08:37:04.086 Traceback (most recent call last):
E 2012-10-29 08:37:04.086 File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/app_logging.py",
line 98, in emit
E 2012-10-29 08:37:04.086 Traceback (most recent call last):
E 2012-10-29 08:37:04.086 File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/app_logging.py",
line 91, in emit
E 2012-10-29 08:37:04.086 Traceback (most recent call last):
E 2012-10-29 08:37:04.086 File
"/base/python_runtime/python_lib/versions/1/google/appengine/api/app_logging.py",
line 98, in emit
The warnings for the generators would appear to be from 9 separate,
otherwise unrelated tasklets that are all executing concurrently and
all happen to be at different points in the code path. Is that
correct?
The recursion depth error seems to come from the app_logging. But is
that the underlying cause, or the symptom of the failure? If the
latter, how do I narrow what got me into this situation?
Any help much appreciated.
-ckhan
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