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https://issues.apache.org/jira/browse/DISPATCH-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17490447#comment-17490447
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ASF subversion and git services commented on DISPATCH-2327:
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Commit 5771f8b12ab6b5bd98bc4ac093c5926481e035b4 in qpid-dispatch's branch
refs/heads/main from Ken Giusti
[ https://gitbox.apache.org/repos/asf?p=qpid-dispatch.git;h=5771f8b ]
DISPATCH-2327: clean up link routes at end of tests
This closes #1512
> system_tests_multi_tenancy flaky link route test failures
> ---------------------------------------------------------
>
> Key: DISPATCH-2327
> URL: https://issues.apache.org/jira/browse/DISPATCH-2327
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Tests
> Affects Versions: 1.18.0
> Reporter: Ken Giusti
> Assignee: Ken Giusti
> Priority: Major
> Fix For: 1.19.0
>
>
> Very occasionally one of the linkRoute tests in the
> system_tests_multi_tenancy.py ctests will fail:
> 38: FAIL: test_22_two_router_link_route_targeted_no_tenant
> (system_tests_multi_tenancy.RouterTest)
>
> 38: ----------------------------------------------------------------------
>
> 38: Traceback (most recent call last):
>
> 38: File "/home/kgiusti/work/dispatch/qpid-dispatch/test
> /system_tests_multi_tenancy.py", line 290, in
> test_22_two_router_link_route_targeted_no_tenant
>
> 38: self.assertIsNone(test.error)
>
> 38: AssertionError: 'Timeout Expired: n_sent=0 n_rcvd=0 n_settled=0' is not
> None
> Examining the router logs it appears as if the attempt to use the link route
> is rejected with a "no route" error.
> I believe the problem is that each test uses the same link route configured
> address. Each test starts by establishing the route container connection
> then polls the routers waiting for the link route address to propagate. Once
> the poll succeeds the test starts.
> IIUC what is happening is that at the end of each test the link route address
> may still exist in the route tables - it has not been totally removed. This
> causes the next test's poll to immediately succeed before the test's link
> route has been properly propagated. This results in the failure if the new
> link route doesn't establish itself before traffic is sent.
> The fix is to have each test wait for all link route addresses to be removed
> from the routing tables before the test ends.
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