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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PROTON-200) [Proton-c] Credit distribution by messenger is not balanced across all links
Date Wed, 16 Oct 2013 08:25:43 GMT

    [ https://issues.apache.org/jira/browse/PROTON-200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13796547#comment-13796547
] 

Keith Wall commented on PROTON-200:
-----------------------------------

Yesterday's commit (https://svn.apache.org/r1532452) broke an internal Jenkins build as the
change makes use of a Python 2.5 language feature (try/except/finally in the same block -
support for which was introduced by Python 2.5).   We'd understood that we wanted to remain
Python 2.4 compatible.

We are using python distribution python-2.4.3-24.el5.x86_64 and the box is running Red Hat
Enterprise Linux Server release 5.3 (Tikanga).

Traceback (most recent call last):
  File "./tests/python/proton-test", line 596, in ?
    m = __import__(name, None, None, ["dummy"])
  File "/home/.jenkins/jobs/Trunk-Proton-C/workspace/proton/tests/python/proton_tests/__init__.py",
line 23, in ?
    import proton_tests.messenger
  File "/home/.jenkins/jobs/Trunk-Proton-C/workspace/proton/tests/python/proton_tests/messenger.py",
line 106
    finally:

> [Proton-c] Credit distribution by messenger is not balanced across all links
> ----------------------------------------------------------------------------
>
>                 Key: PROTON-200
>                 URL: https://issues.apache.org/jira/browse/PROTON-200
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c
>    Affects Versions: 0.3
>            Reporter: Ken Giusti
>            Assignee: Ken Giusti
>         Attachments: proton-200.patch, upstream-credit.patch
>
>
> The method used to distribute credit to receiving links may lead to starvation when the
number of receiving links is > the available credit.
> The distribution algorithm always starts with the same link - see messenger.c::pn_messenger_flow()



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