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asyncio, Tulip issue 139: Improve error messages on "fatal errors" 

Mention if the error was caused by a read or a write, and be more specific on
the object (ex: "pipe transport" instead of "transport").
This commit is contained in:
Victor Stinner 2014-02-19 01:40:41 +01:00
parent c098241342
commit 065ca25aae
6 changed files with 64 additions and 38 deletions
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10
Lib/asyncio/proactor_events.py
View File

@ -53,10 +53,10 @@ class _ProactorBasePipeTransport(transports._FlowControlMixin,
if self._read_fut is not None:
self._read_fut.cancel()
def _fatal_error(self, exc):
def _fatal_error(self, exc, message='Fatal error on pipe transport'):
if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
self._loop.call_exception_handler({
'message': 'Fatal transport error',
'message': message,
'exception': exc,
'transport': self,
'protocol': self._protocol,
@ -151,11 +151,11 @@ class _ProactorReadPipeTransport(_ProactorBasePipeTransport,
self._read_fut = self._loop._proactor.recv(self._sock, 4096)
except ConnectionAbortedError as exc:
if not self._closing:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal read error on pipe transport')
except ConnectionResetError as exc:
self._force_close(exc)
except OSError as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal read error on pipe transport')
except futures.CancelledError:
if not self._closing:
raise
@ -246,7 +246,7 @@ class _ProactorBaseWritePipeTransport(_ProactorBasePipeTransport,
except ConnectionResetError as exc:
self._force_close(exc)
except OSError as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal write error on pipe transport')
def can_write_eof(self):
return True

22
Lib/asyncio/selector_events.py
View File

@ -377,11 +377,11 @@ class _SelectorTransport(transports._FlowControlMixin,
self._conn_lost += 1
self._loop.call_soon(self._call_connection_lost, None)
def _fatal_error(self, exc):
def _fatal_error(self, exc, message='Fatal error on transport'):
# Should be called from exception handler only.
if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
self._loop.call_exception_handler({
'message': 'Fatal transport error',
'message': message,
'exception': exc,
'transport': self,
'protocol': self._protocol,
@ -452,7 +452,7 @@ class _SelectorSocketTransport(_SelectorTransport):
except (BlockingIOError, InterruptedError):
pass
except Exception as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal read error on socket transport')
else:
if data:
self._protocol.data_received(data)
@ -488,7 +488,7 @@ class _SelectorSocketTransport(_SelectorTransport):
except (BlockingIOError, InterruptedError):
pass
except Exception as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal write error on socket transport')
return
else:
data = data[n:]
@ -511,7 +511,7 @@ class _SelectorSocketTransport(_SelectorTransport):
except Exception as exc:
self._loop.remove_writer(self._sock_fd)
self._buffer.clear()
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal write error on socket transport')
else:
if n:
del self._buffer[:n]
@ -678,7 +678,7 @@ class _SelectorSslTransport(_SelectorTransport):
self._loop.remove_reader(self._sock_fd)
self._loop.add_writer(self._sock_fd, self._write_ready)
except Exception as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal read error on SSL transport')
else:
if data:
self._protocol.data_received(data)
@ -712,7 +712,7 @@ class _SelectorSslTransport(_SelectorTransport):
except Exception as exc:
self._loop.remove_writer(self._sock_fd)
self._buffer.clear()
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal write error on SSL transport')
return
if n:
@ -770,7 +770,7 @@ class _SelectorDatagramTransport(_SelectorTransport):
except OSError as exc:
self._protocol.error_received(exc)
except Exception as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal read error on datagram transport')
else:
self._protocol.datagram_received(data, addr)
@ -805,7 +805,8 @@ class _SelectorDatagramTransport(_SelectorTransport):
self._protocol.error_received(exc)
return
except Exception as exc:
self._fatal_error(exc)
self._fatal_error(exc,
'Fatal write error on datagram transport')
return
# Ensure that what we buffer is immutable.
@ -827,7 +828,8 @@ class _SelectorDatagramTransport(_SelectorTransport):
self._protocol.error_received(exc)
return
except Exception as exc:
self._fatal_error(exc)
self._fatal_error(exc,
'Fatal write error on datagram transport')
return
self._maybe_resume_protocol() # May append to buffer.

14
Lib/asyncio/unix_events.py
View File

@ -271,7 +271,7 @@ class _UnixReadPipeTransport(transports.ReadTransport):
except (BlockingIOError, InterruptedError):
pass
except OSError as exc:
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal read error on pipe transport')
else:
if data:
self._protocol.data_received(data)
@ -291,11 +291,11 @@ class _UnixReadPipeTransport(transports.ReadTransport):
if not self._closing:
self._close(None)
def _fatal_error(self, exc):
def _fatal_error(self, exc, message='Fatal error on pipe transport'):
# should be called by exception handler only
if not (isinstance(exc, OSError) and exc.errno == errno.EIO):
self._loop.call_exception_handler({
'message': 'Fatal transport error',
'message': message,
'exception': exc,
'transport': self,
'protocol': self._protocol,
@ -381,7 +381,7 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
n = 0
except Exception as exc:
self._conn_lost += 1
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal write error on pipe transport')
return
if n == len(data):
return
@ -406,7 +406,7 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
# Remove writer here, _fatal_error() doesn't it
# because _buffer is empty.
self._loop.remove_writer(self._fileno)
self._fatal_error(exc)
self._fatal_error(exc, 'Fatal write error on pipe transport')
else:
if n == len(data):
self._loop.remove_writer(self._fileno)
@ -443,11 +443,11 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
def abort(self):
self._close(None)
def _fatal_error(self, exc):
def _fatal_error(self, exc, message='Fatal error on pipe transport'):
# should be called by exception handler only
if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
self._loop.call_exception_handler({
'message': 'Fatal transport error',
'message': message,
'exception': exc,
'transport': self,
'protocol': self._protocol,

12
Lib/test/test_asyncio/test_proactor_events.py
View File

@ -69,7 +69,9 @@ class ProactorSocketTransportTests(unittest.TestCase):
tr = _ProactorSocketTransport(self.loop, self.sock, self.protocol)
tr._fatal_error = unittest.mock.Mock()
tr._loop_reading()
tr._fatal_error.assert_called_with(err)
tr._fatal_error.assert_called_with(
err,
'Fatal read error on pipe transport')
def test_loop_reading_aborted_closing(self):
self.loop._proactor.recv.side_effect = ConnectionAbortedError()
@ -105,7 +107,9 @@ class ProactorSocketTransportTests(unittest.TestCase):
tr = _ProactorSocketTransport(self.loop, self.sock, self.protocol)
tr._fatal_error = unittest.mock.Mock()
tr._loop_reading()
tr._fatal_error.assert_called_with(err)
tr._fatal_error.assert_called_with(
err,
'Fatal read error on pipe transport')
def test_write(self):
tr = _ProactorSocketTransport(self.loop, self.sock, self.protocol)
@ -142,7 +146,9 @@ class ProactorSocketTransportTests(unittest.TestCase):
tr._fatal_error = unittest.mock.Mock()
tr._buffer = [b'da', b'ta']
tr._loop_writing()
tr._fatal_error.assert_called_with(err)
tr._fatal_error.assert_called_with(
err,
'Fatal write error on pipe transport')
tr._conn_lost = 1
tr.write(b'data')

36
Lib/test/test_asyncio/test_selector_events.py
View File

@ -655,7 +655,7 @@ class SelectorTransportTests(unittest.TestCase):
m_exc.assert_called_with(
test_utils.MockPattern(
'Fatal transport error\nprotocol:.*\ntransport:.*'),
'Fatal error on transport\nprotocol:.*\ntransport:.*'),
exc_info=(OSError, MOCK_ANY, MOCK_ANY))
tr._force_close.assert_called_with(exc)
@ -785,7 +785,9 @@ class SelectorSocketTransportTests(unittest.TestCase):
transport._fatal_error = unittest.mock.Mock()
transport._read_ready()
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal read error on socket transport')
def test_write(self):
data = b'data'
@ -898,7 +900,9 @@ class SelectorSocketTransportTests(unittest.TestCase):
self.loop, self.sock, self.protocol)
transport._fatal_error = unittest.mock.Mock()
transport.write(data)
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal write error on socket transport')
transport._conn_lost = 1
self.sock.reset_mock()
@ -1001,7 +1005,9 @@ class SelectorSocketTransportTests(unittest.TestCase):
transport._fatal_error = unittest.mock.Mock()
transport._buffer.extend(b'data')
transport._write_ready()
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal write error on socket transport')
@unittest.mock.patch('asyncio.base_events.logger')
def test_write_ready_exception_and_close(self, m_log):
@ -1237,7 +1243,9 @@ class SelectorSslTransportTests(unittest.TestCase):
transport = self._make_one()
transport._fatal_error = unittest.mock.Mock()
transport._read_ready()
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal read error on SSL transport')
def test_write_ready_send(self):
self.sslsock.send.return_value = 4
@ -1319,7 +1327,9 @@ class SelectorSslTransportTests(unittest.TestCase):
transport._buffer = list_to_buffer([b'data'])
transport._fatal_error = unittest.mock.Mock()
transport._write_ready()
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal write error on SSL transport')
self.assertEqual(list_to_buffer(), transport._buffer)
def test_write_ready_read_wants_write(self):
@ -1407,7 +1417,9 @@ class SelectorDatagramTransportTests(unittest.TestCase):
transport._fatal_error = unittest.mock.Mock()
transport._read_ready()
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal read error on datagram transport')
def test_read_ready_oserr(self):
transport = _SelectorDatagramTransport(
@ -1517,7 +1529,9 @@ class SelectorDatagramTransportTests(unittest.TestCase):
transport.sendto(data, ())
self.assertTrue(transport._fatal_error.called)
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal write error on datagram transport')
transport._conn_lost = 1
transport._address = ('123',)
@ -1633,7 +1647,9 @@ class SelectorDatagramTransportTests(unittest.TestCase):
transport._buffer.append((b'data', ()))
transport._sendto_ready()
transport._fatal_error.assert_called_with(err)
transport._fatal_error.assert_called_with(
err,
'Fatal write error on datagram transport')
def test_sendto_ready_error_received(self):
self.sock.sendto.side_effect = ConnectionRefusedError
@ -1667,7 +1683,7 @@ class SelectorDatagramTransportTests(unittest.TestCase):
self.assertFalse(self.protocol.error_received.called)
m_exc.assert_called_with(
test_utils.MockPattern(
'Fatal transport error\nprotocol:.*\ntransport:.*'),
'Fatal error on transport\nprotocol:.*\ntransport:.*'),
exc_info=(ConnectionRefusedError, MOCK_ANY, MOCK_ANY))

8
Lib/test/test_asyncio/test_unix_events.py
View File

@ -365,7 +365,7 @@ class UnixReadPipeTransportTests(unittest.TestCase):
tr._close.assert_called_with(err)
m_logexc.assert_called_with(
test_utils.MockPattern(
'Fatal transport error\nprotocol:.*\ntransport:.*'),
'Fatal read error on pipe transport\nprotocol:.*\ntransport:.*'),
exc_info=(OSError, MOCK_ANY, MOCK_ANY))
@unittest.mock.patch('os.read')
@ -558,7 +558,9 @@ class UnixWritePipeTransportTests(unittest.TestCase):
m_write.assert_called_with(5, b'data')
self.assertFalse(self.loop.writers)
self.assertEqual([], tr._buffer)
tr._fatal_error.assert_called_with(err)
tr._fatal_error.assert_called_with(
err,
'Fatal write error on pipe transport')
self.assertEqual(1, tr._conn_lost)
tr.write(b'data')
@ -660,7 +662,7 @@ class UnixWritePipeTransportTests(unittest.TestCase):
self.assertTrue(tr._closing)
m_logexc.assert_called_with(
test_utils.MockPattern(
'Fatal transport error\nprotocol:.*\ntransport:.*'),
'Fatal write error on pipe transport\nprotocol:.*\ntransport:.*'),
exc_info=(OSError, MOCK_ANY, MOCK_ANY))
self.assertEqual(1, tr._conn_lost)
test_utils.run_briefly(self.loop)