Drop VPN between broker & client causes stack trace in tight loop in driver.
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Key: QPID-3211
URL: https://issues.apache.org/jira/browse/QPID-3211
Project: Qpid
Issue Type: Bug
Components: Python Client
Affects Versions: 0.8
Environment: machine = F14 (vm)
installed:
qpid-cpp-server-store-0.8-4.fc14.x86_64
qpid-cpp-client-0.8-4.fc14.x86_64
qpid-cpp-server-ssl-0.8-4.fc14.x86_64
qpid-cpp-client-ssl-0.8-4.fc14.x86_64
python-qpid-0.8-3.fc14.noarch
qpid-cpp-server-0.8-4.fc14.x86_64
Reporter: Jeff Ortel
When dropping the VPN between the broker (machine) and client (machine) causes
the python-qpid driver to enter a tight loop raising exceptions. The following
trace is written to the log endlessly and process takes 100% CPU. The python
driver seems to be in a broken state. It's possible that this condition can
occur when other significant networking issues arise but not sure.
TRACE:
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2011-04-08 15:47:06,834 [ERROR][cds-localhost.localdomain] __fetch() @
consumer.py:90 -
cds-localhost.localdomain
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/gofer/messaging/consumer.py", line 86,
in __fetch
return self.receiver.fetch(timeout=self.WAIT)
File "<string>", line 6, in fetch
File "/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 997,
in fetch
self._ecwait(lambda: self.linked)
File "/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 50,
in _ecwait
result = self._ewait(lambda: self.closed or predicate(), timeout)
File "/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 960,
in _ewait
result = self.session._ewait(lambda: self.error or predicate(), timeout)
File "/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 553,
in _ewait
result = self.connection._ewait(lambda: self.error or predicate(), timeout)
File "/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 196,
in _ewait
self.check_error()
File "/usr/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 189,
in
check_error
raise self.error
InternalError: Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/qpid/messaging/driver.py", line 648, in
write
op.dispatch(self)
File "/usr/lib/python2.7/site-packages/qpid/ops.py", line 84, in dispatch
getattr(target, handler)(self, *args)
File "/usr/lib/python2.7/site-packages/qpid/messaging/driver.py", line 860, in
do_session_detached
sst = self._sessions.pop(dtc.channel)
KeyError: 0
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