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Posted to issues@activemq.apache.org by "Justin Bertram (Jira)" <ji...@apache.org> on 2025/06/03 20:04:00 UTC
[jira] [Resolved] (ARTEMIS-5499) Refactor MQTT subscription persistence
[ https://issues.apache.org/jira/browse/ARTEMIS-5499?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Justin Bertram resolved ARTEMIS-5499.
-------------------------------------
Fix Version/s: 2.42.0
Resolution: Fixed
> Refactor MQTT subscription persistence
> --------------------------------------
>
> Key: ARTEMIS-5499
> URL: https://issues.apache.org/jira/browse/ARTEMIS-5499
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Reporter: Justin Bertram
> Assignee: Justin Bertram
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.42.0
>
> Time Spent: 4h 40m
> Remaining Estimate: 0h
>
> The current way the broker persists MQTT subscription data has the potential to starve the broker of threads. It also leads to timeouts like this under load:
> {noformat}
> java.lang.IllegalStateException: AMQ850000: Unable to store MQTT state within given timeout: 5000ms
> at org.apache.activemq.artemis.core.protocol.mqtt.MQTTStateManager.storeSessionState(MQTTStateManager.java:192)
> at org.apache.activemq.artemis.core.protocol.mqtt.MQTTSubscriptionManager.addSubscriptions(MQTTSubscriptionManager.java:334){noformat}
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