Comments (8)
elephantum
commented on May 18, 2024
that seems to be general problem which is caused by inconsistency between epoll.c and select.epoll in py2.6
epoll.c raises OSError, while select.epoll raises IOError.
may be the best way to fix this is to alter epoll.c and tornado to use IOError like select.epoll does
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stevvooe
commented on May 18, 2024
This sounds reasonable.
Is this project being maintained? There hasn't been any activity on it in month and I don't want to maintain a fork for simple bug fixes.
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mackstann
commented on May 18, 2024
Seeing this problem as well. It doesn't actually seem to break my code at all; it just adds a bunch of slightly alarming little tracebacks in the logging output.
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caseymrm
commented on May 18, 2024
Thanks stevvooe and others, this has been fixed: http://github.com/facebook/tornado/commit/57ec818a3f8ab56dec1b6cf585fa7c8c4d6ab80a
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aloksingh
commented on May 18, 2024
Same issue in the loop that calls remove_handler(fd)
2010-07-26 12:00:50,449 [ERROR] - Exception in callback >
Traceback (most recent call last):
File "/usr/local/jive/python/lib/python2.6/site-packages/tornado/ioloop.py", line 245, in _run_callback
callback()
File "/usr/local/jive/python/lib/python2.6/site-packages/tornado/httpclient.py", line 214, in _perform
self.io_loop.remove_handler(fd)
File "/usr/local/jive/python/lib/python2.6/site-packages/tornado/ioloop.py", line 135, in remove_handler
self._impl.unregister(fd)
IOError: [Errno 2] No such file or directory
In httpclient.py
for fd in self._fds:
if fd not in fds:
self.io_loop.remove_handler(fd)
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upalse
commented on May 18, 2024
it seems to be rather common for epoll to spuriously forget about descriptors once they become unpollable (e.g. peer shuts down connection).
Traceback (most recent call last):
File "/usr/local/lib/python2.6/dist-packages/tornado-1.1-py2.6.egg/tornado/httpclient.py", line 205, in _handle_socket
self.io_loop.update_handler(fd, ioloop_event)
File "/usr/local/lib/python2.6/dist-packages/tornado-1.1-py2.6.egg/tornado/ioloop.py", line 155, in update_handler
self._impl.modify(fd, events | self.ERROR)
IOError: [Errno 2] No such file or directory
Traceback (most recent call last):
File "/usr/local/lib/python2.6/dist-packages/tornado-1.1-py2.6.egg/tornado/httpclient.py", line 205, in _handle_socket
self.io_loop.update_handler(fd, ioloop_event)
File "/usr/local/lib/python2.6/dist-packages/tornado-1.1-py2.6.egg/tornado/ioloop.py", line 155, in update_handler
self._impl.modify(fd, events | self.ERROR)
IOError: [Errno 2] No such file or directory
fix:
$ git diff
diff --git a/tornado/ioloop.py b/tornado/ioloop.py
index ea34e0f..dbda034 100644
--- a/tornado/ioloop.py
+++ b/tornado/ioloop.py
@@ -152,7 +152,11 @@ class IOLoop(object):
def update_handler(self, fd, events):
"""Changes the events we listen for fd."""
- self._impl.modify(fd, events | self.ERROR)
+ try:
+ self._impl.modify(fd, events | self.ERROR)
+ except (OSError, IOError):
+ logging.debug("Error updating fd in IOLoop", exc_info=True)
+
def remove_handler(self, fd):
"""Stop listening for events on fd."""
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gwillem
commented on May 18, 2024
With Python 3.4.3, Linux 3.19.0-22-generic and Tornado 4.2.1 I still get this error incidentally, when I run a spider with 100+ concurrency.
DEBUG:tornado.general:Error deleting fd from IOLoop
Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/tornado/ioloop.py", line 715, in remove_handler
self._impl.unregister(fd)
FileNotFoundError: [Errno 2] No such file or directory
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bdarnell
commented on May 18, 2024
This is just a "debug" logging message; it doesn't indicate an actual problem.
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