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From "james strachan (JIRA)" <>
Subject [jira] Resolved: (AMQ-747) Redelivery backoff should add random delay for collision avoidance
Date Mon, 19 Jun 2006 11:56:51 GMT
     [ ]
james strachan resolved AMQ-747:

    Resolution: Fixed

Patch applied - many thanks!

(we just missed 4.0.1 but will try release 4.1 real soon).

> Redelivery backoff should add random delay for collision avoidance
> ------------------------------------------------------------------
>          Key: AMQ-747
>          URL:
>      Project: ActiveMQ
>         Type: Improvement

>   Components: Connector
>     Versions: 4.0
>     Reporter: Christopher G. Stach II
>      Fix For: 4.1
>  Attachments: AMQ-747.patch
> If a rollback on two messages happens between three transactional deliveries, and the
two messages are redelivered with the same redelivery backoff settings, there is a likelihood
that both messages will cause another rollback to happen.  If maximumRedeliveries is set too
low, or there are a maximumRedeliveries + 1 messages coming in simultaneously, messages may
never get delivered.  Can we get another option for the clients that adds a random backoff
delay adjustment in addition to the constant backoff delay factor?  This would end up working
like most other collision avoidance algorithms.

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