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From "Kim van der Riet (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-5948) [linearstore] Broker restart failure with durable topic using non-durable exchange
Date Mon, 04 Aug 2014 19:42:12 GMT

    [ https://issues.apache.org/jira/browse/QPID-5948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085168#comment-14085168

Kim van der Riet commented on QPID-5948:

I agree that this is a minimalistic fix for just one manifestation of what is probably a broad
class of issue - that of durability dependency. I don't think this is a simple issue to fix,
and needs to be handled in multiple places, including qmf tools. While I have not tested other
scenarios, I'm sure that there are other ways to create issues such as this, for example:

Create durable exchange
Create durable topic that uses durable exchange
Delete durable exchange

This creates a "dangling" durability dependency. If caught, would you prevent the deletion
until the dependent topic is also deleted, or do you delete both (after a warning)?

I do agree that it would be nice to create the exchange on the fly in such a case.

> [linearstore] Broker restart failure with durable topic using non-durable exchange
> ----------------------------------------------------------------------------------
>                 Key: QPID-5948
>                 URL: https://issues.apache.org/jira/browse/QPID-5948
>             Project: Qpid
>          Issue Type: Improvement
>          Components: C++ Broker
>            Reporter: Kim van der Riet
>            Assignee: Kim van der Riet
> If a durable topic is created which uses a non-durable exchange, then the recovery of
the broker fails with "Exchange not found" error message. Although this is a configuration
error, and can probably be reproduced in a number of ways, the fact that the broker will fail
to start is a potentially serious problem.
> Steps to Reproduce:
> 0. Start broker with amqp and linearstore modules
> 1. qpid-config add exchange fanout test.ex
> 2. qpid-config add topic test.topic --argument exchange=test.ex --argument durable=True
> 3. Restart broker

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