[jira] [Comment Edited] (BOOKKEEPER-507) Race condition happens if closeSubscription and subscribe happened at the same time (in multiplexed client).

["Flavio Junqueira (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BOOKKEEPER-507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13542877#comment-13542877 ] 

Flavio Junqueira edited comment on BOOKKEEPER-507 at 1/3/13 11:53 AM:
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Have you made the changes suggested above, Ivan?

https://issues.apache.org/jira/browse/BOOKKEEPER-507?focusedCommentId=13542482&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13542482

Never mind, I checked the commit message and I can see you did it. Thanks a lot!
                
      was (Author: fpj):
    Have you made the changes suggested above, Ivan?

https://issues.apache.org/jira/browse/BOOKKEEPER-507?focusedCommentId=13542482&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13542482
                  
> Race condition happens if closeSubscription and subscribe happened at the same time (in multiplexed client).
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-507
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-507
>             Project: Bookkeeper
>          Issue Type: Bug
>            Reporter: Sijie Guo
>            Assignee: Sijie Guo
>            Priority: Blocker
>             Fix For: 4.2.0
>
>         Attachments: BOOKKEEPER-507.diff, BOOKKEEPER-507.diff, BOOKKEEPER-507.diff, subscribeshouldrespondafterstartserving.patch
>
>
> 1) closesub first
> 2) sub late
> 3) closesub succeed, but response is delayed to client.
> 4) since closesub succeed in server side, so sub succeed and tried to deliver message.
> 5) sub response is back
> 6) client checked and found that there is already a subscriber there.
> 7) client failed the subscribe request
> 8) but the message would still be delivered to same channel. since the sub state is not be cleared. message is still be received.
> 9) closesub response is back.
> 10) it clear the subscribe state.
> 11) message continue delivering but found there is no subscriber state.
> at step 11) the problem happened.
> this race condition is introduced in multiplexed client (BOOKKEEPER-70).

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