[jbossts-issues] [JBoss JIRA] (JBTM-1573) Transaction timeout incompatible with block forever

[Tom Jenkinson (JIRA)]

     [ https://issues.jboss.org/browse/JBTM-1573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tom Jenkinson moved BLACKTIE-324 to JBTM-1573:
----------------------------------------------

          Project: JBoss Transaction Manager  (was: Blacktie)
              Key: JBTM-1573  (was: BLACKTIE-324)
      Component/s: BlackTie
                   BlackTie
                       (was: atmibroker-tx)
                       (was: All C++ )
    Fix Version/s: 5.0.0.Final
                       (was: 5.0.0.Final)

    
> Transaction timeout incompatible with block forever
> ---------------------------------------------------
>
>                 Key: JBTM-1573
>                 URL: https://issues.jboss.org/browse/JBTM-1573
>             Project: JBoss Transaction Manager
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: BlackTie, BlackTie
>            Reporter: Tom Jenkinson
>            Assignee: Amos Feng
>             Fix For: 5.0.0.Final
>
>         Attachments: blocking call.log
>
>
> Currently we set a transaction timeout (e.g. in TestRollbackOnly.cxx we call tx_set_transaction_timeout)
> This ends up putting a timetolive on the message of the same duration.
> Now, if this message is not received within the period of time it will expire.
> However we also use a block forever waiting for the response.
> This can lead to a call never returning.
> i.e.
> server advertises queue
> client sends message with small timeout (e.g. 4) and then blocks forever waiting response
> server gets round to advertising queue 5 seconds later but never sees the clients initial request
> client is blocked forever
> I realise that we are meant to block forever when a client issues a tpcall under transactional conditions but something needs to be done as this can easily happen on slow machines?
> Perhaps we need to make use of the DLQ to wake up the blocked client with an error message??
> Perhaps the client doesn't block forever and just calls txrollback if nothing is heard back??

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