Ganesh Murthy created PROTON-2056:
-------------------------------------
Summary: [proton-python] on_settled callback not called when
disposition arrives in 2 frames
Key: PROTON-2056
URL: https://issues.apache.org/jira/browse/PROTON-2056
Project: Qpid Proton
Issue Type: Bug
Components: proton-c, python-binding
Affects Versions: proton-c-0.28.0
Reporter: Ganesh Murthy
When very large anonymous messages are sent to the router and these messages
have no receiver, they are immediately released. The router waits for the
entire large message to arrive in the router before settling it. Due to this,
in some cases, two disposition frames are sent for the same delivery, the first
has state=released and the second has settled=true as seen below
{noformat}
0x56330c891430]:0 <- @disposition(21) [role=true, first=315,
state=@released(38) []]
[0x56330c891430]:0 <- @disposition(21) [role=true, first=315, settled=true,
state=@released(38) []]{noformat}
When this case happens, the on_settled is not called for the python binding.
The on_released is called. The on_settled must be called when a settlement
arrives for every delivery. I observed this behavior in a python system test in
Dispatch Router. The test called
test_51_anon_sender_mobile_address_large_msg_edge_to_edge_two_interior can be
found in tests/system_tests_edge_router.py
The test does not fail all the time but when it does it is due to the
on_settled not being called for deliveries that have this two part disposition.
I tried in vain to write a standalone python reproducer. I could not do it.
To run the specific system test run the following from the qpid-dispatch/build
folder
{noformat}
/usr/bin/python "/home/gmurthy/opensource/qpid-dispatch/build/tests/run.py"
"-m" "unittest" "-v"
"system_tests_edge_router.RouterTest.test_51_anon_sender_mobile_address_large_msg_edge_to_edge_two_interior"{noformat}
The following is the test failure
{noformat}
test_51_anon_sender_mobile_address_large_msg_edge_to_edge_two_interior
(system_tests_edge_router.RouterTest) ... FAIL
======================================================================
FAIL: test_51_anon_sender_mobile_address_large_msg_edge_to_edge_two_interior
(system_tests_edge_router.RouterTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/gmurthy/opensource/qpid-dispatch/tests/system_tests_edge_router.py",
line 964, in
test_51_anon_sender_mobile_address_large_msg_edge_to_edge_two_interior
self.assertEqual(None, test.error)
AssertionError: None != u'Timeout Expired - n_sent=350 n_accepted=300
n_modified=0 n_released=48'
----------------------------------------------------------------------
Ran 1 test in 17.661s
FAILED (failures=1)
{noformat}
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