[jira] [Resolved] (PROTON-2033) qpid-proton changes 0.27.x to master(9ff0a) break qpid-dispatch self test

["Chuck Rolke (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PROTON-2033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chuck Rolke resolved PROTON-2033.
---------------------------------
    Resolution: Not A Bug

Subtle timing changes exposed bug in qpid-dispatch mission code.

> qpid-proton changes 0.27.x to master(9ff0a) break qpid-dispatch self test
> -------------------------------------------------------------------------
>
>                 Key: PROTON-2033
>                 URL: https://issues.apache.org/jira/browse/PROTON-2033
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c, python-binding
>    Affects Versions: proton-c-0.28.0
>         Environment: Fedora 29, python 3.7, proton and dispatch debug builds
>            Reporter: Chuck Rolke
>            Assignee: Andrew Stitcher
>            Priority: Major
>
> While cleaning up qpid-dispatch for a 1.6 follow-on release an intermittent failure in one of the tests was exposed. Analysis of the failure is in https://issues.apache.org/jira/browse/DISPATCH-1322 in an attached text document https://issues.apache.org/jira/secure/attachment/12965891/DISPATCH-1322-analysis.txt
> Another part of the cleanup was fixing the failing test to better report what went wrong. See https://issues.apache.org/jira/browse/DISPATCH-1318
> These issues happened using qpid-proton master @9ff0a. Temporarily the qpid-proton version was reverted to branch 0.27.x @560ba. Using proton 0.27.x branch the qpid-dispatch self test does not fail. It passed several thousand times in a loop. Moving proton back to the master branch brought the dispatch failures back.
> From the qpid-dispatch perspective this issue is serious. If a receiver detaches a link while a sender is sending to it then the sender may lose a disposition.
> No attempt yet has been made to bisect proton to see where the different behavior starts showing up. That may be the next best avenue of research.
> Another theory for the error is that qpid-dispatch has been mishandling links all along.
> To help expose the problem one may clone [https://github.com/ChugR/qpid-dispatch] , or add it as a remote, and then check out branch DISPATCH-1318-cwip. Test system_tests_edge_router has been gutted to run only test_12 in a loop and to print details of the error(s).
> {{  cd build}}
> {{  make}}
> {{  ctest -VV -R edge}}
>  
>  



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