[jira] Updated: (AMQ-3141) Messages may be lost when schedule them with a short delay

["Swen Moczarski (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMQ-3141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Swen Moczarski updated AMQ-3141:
--------------------------------

    Attachment: AMQ3141.patch
                AMQ3141Test.patch

Test and patch attached.

> Messages may be lost when schedule them with a short delay
> ----------------------------------------------------------
>
>                 Key: AMQ-3141
>                 URL: https://issues.apache.org/jira/browse/AMQ-3141
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.4.2
>            Reporter: Swen Moczarski
>            Priority: Minor
>         Attachments: AMQ3141.patch, AMQ3141Test.patch
>
>
> The message scheduler has an optimization, that the schedule time will be aligned to seconds. All messages which included in the same second will be maintained in one store entry with a list of jobs. 
> The list will be read from the store during the main loop, the entries will be executed and the list will be deleted from the store. When new messages are added on the same list during the scheduling, these messages could be lost.
> One possible fix could be, that the main loop reads and removes the lists in one atomic step due to a synchronization. 

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