[jira] [Updated] (ARTEMIS-3766) Race condition with Dual Mirror and Expiry

["Clebert Suconic (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARTEMIS-3766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Clebert Suconic updated ARTEMIS-3766:
-------------------------------------
    Fix Version/s: 2.24.0

> Race condition with Dual Mirror and Expiry
> ------------------------------------------
>
>                 Key: ARTEMIS-3766
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-3766
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>    Affects Versions: 2.21.0
>            Reporter: Stephen Baker
>            Priority: Major
>             Fix For: 2.24.0
>
>
> When dual mirroring is in play there is a race condition which can result in missing or duplicate messages on the brokers.
>  
> Scenario 1:
>  # Bring up two artemis instances with broker-connection mirroring between each other. (A and B)
>  # Send a message to A with a short TTL (I used 30 seconds in my test)
>  # After the message mirrors but before it expires, pause the Mirror queue on both sides
>  # Wait for the message to expire, and the reaper thread to pick it up
>  # Observe that on both sides the message has moved to the ExpiryQueue. In the Mirror queue there are 2 messages on A (a message destined to the ExpiryQueue and an ack on the original message). On B there is a single message in the mirror, which is the message to the expiry queue.
>  # Resume the mirror, I'm not sure the order matters, but I did B and then A.
>  # Observe that on A there is a single message in the ExpiryQueue, but on B there are now 2 messages in the expiry queue.
> Scenario 2:
>  # Bring up two artemis instances with broker-connection mirroring between each other. (A and B). On A disable the reaper thread by setting `<message-expiry-scan-period>-1</message-expiry-scan-period>`
>  # Send a message to A with a short TTL
>  # Wait for the TTL to expire
>  # On B the message moves to the ExpiryQueue, on A the message ends disappears (no longer in the ExpiryQueue nor the original queue)



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