[jira] [Updated] (PROTON-905) Long-lived connections leak sessions and links

["Justin Ross (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PROTON-905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Justin Ross updated PROTON-905:
-------------------------------
    Labels: leak  (was: )

> Long-lived connections leak sessions and links
> ----------------------------------------------
>
>                 Key: PROTON-905
>                 URL: https://issues.apache.org/jira/browse/PROTON-905
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c
>    Affects Versions: 0.9.1, 0.10
>            Reporter: Ken Giusti
>            Assignee: Rafael H. Schloming
>              Labels: leak
>             Fix For: 0.12.0
>
>         Attachments: test-send.py
>
>
> I found this issue while debugging a crash dump of qpidd.
> Long lived connections do not free its sessions/link.
> This only applies when NOT using the event model.  The version of qpidd I tested against (0.30) still uses the iterative model.  Point to consider, I don't know why this is the case.
> Details:  I have a test script that opens a single connection, then continually creates sessions/links over that connection, sending one message before closing and freeing the sessions/links.  See attached.
> Over time the qpidd run time consumes all memory on the system and is killed by OOM.  To be clear, I'm using drain to remove all sent messages - there is no message build up.
> On debugging this, I'm finding thousands of session objects on the connections free sessions weakref list.  Every one of those sessions has a refcount of one.
> Once the connection is finalized, all session objects are freed.  But until then, freed sessions continue to accumulate indefinitely.



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