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https://issues.apache.org/jira/browse/AMQ-3569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Tully resolved AMQ-3569.
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Resolution: Won't Fix
this needs a major redesign
> kahaDB producerAudit LRU cache configuration is time dependent, it should not
> be..
> ----------------------------------------------------------------------------------
>
> Key: AMQ-3569
> URL: https://issues.apache.org/jira/browse/AMQ-3569
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Message Store
> Affects Versions: 5.5.0, 5.5.1
> Reporter: Gary Tully
> Assignee: Gary Tully
> Labels: audit, duplicate, failover
> Fix For: 5.9.0
>
>
> The failover: reconnect logic can submit duplicate messages, if a send reply
> is lost. this is trapped by the producerAudit. The audit keeps an LRU cache
> of producerIds and message sequence ids. The default value is 64. This is a
> little small if many producers come and go. It can be configured via:
> {code}<kahaDB ... maxFailoverProducersToTrack="2048" />{code}. The problem
> is picking a value.
> If a connection is down for an indeterminate time, the number of producers
> that will be seen by the audit is indeterminate. It can be made very large,
> but this will consume memory resources. The audit needs to be maintained on a
> connection basis. This will suffer from the same problem, how many
> connections to audit, but with connection pools this can be mitigated better
> than producers.
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