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From "Rob Godfrey (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (QPID-6935) Infinite recursion resulting in huge number of Transfer objects created in Delivery, until OutOfMemory
Date Sat, 10 Dec 2016 17:40:59 GMT

     [ https://issues.apache.org/jira/browse/QPID-6935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rob Godfrey closed QPID-6935.
-----------------------------
    Resolution: Cannot Reproduce

> Infinite recursion resulting in huge number of Transfer objects created in Delivery,
until OutOfMemory
> ------------------------------------------------------------------------------------------------------
>
>                 Key: QPID-6935
>                 URL: https://issues.apache.org/jira/browse/QPID-6935
>             Project: Qpid
>          Issue Type: Bug
>          Components: JMS AMQP 1.0 Client
>    Affects Versions: 0.32
>         Environment: Linux RedHat 7
>            Reporter: Leo Riguspi
>            Priority: Blocker
>         Attachments: Heap.png, Heap2.png, memory_dump.txt, snapshot1.png, snapshot2.png
>
>
> We have an Apache ActiveMQ 5.12 running for 2 months now and a Java AMQP client publishing
a few messages every few minutes. Messages are small, less than 1K and are immediately consumed.
> For the second time in two months the client exploded with an OutOfMemory error. By analysing
the memory the culprit seems to be the ArrayList of Trasfer objects in the Delivery. All of
a sudden, for some reason it just keeps creating new Trasfers until the memory is full.
> We have a screenshot of the memory dump in which there are more than 49000 Trasfer objects
in the same Delivery. Unfortunately there seems to be no way to attach it to this issue.
> We did not find a way to reproduce the problem but it looks like some combination of
conditions cause the SessionEndpoint::sendTransfer recursive method to call itself over and
over, each time adding a new Transfer object. 



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