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https://issues.apache.org/jira/browse/ARTEMIS-5467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Evgeniy Devyatykh updated ARTEMIS-5467:
---------------------------------------
Description:
Since ARTEMIS-4646 MQTT message IDs generated in the cycle but if a client
(malicous ot just bugged) with QoS 1 will not send ACKs and just consume
incoming messages all possible IDs will be used and the cycle goes to infinite
loop. This leads to high CPU usage and even broker self kill by Critical
Analyzer.
{code:java}
2025-04-09 04:43:57,606 WARN
[org.apache.activemq.artemis.utils.critical.CriticalMeasure] Component
org.apache.activemq.artemis.core.server.impl.QueueImpl is expired on path 2
2025-04-09 04:43:57,606 INFO [org.apache.activemq.artemis.core.server]
AMQ224107: The Critical Analyzer detected slow paths on the broker. It is
recommended that you enable trace logs on
org.apache.activemq.artemis.utils.critical while you troubleshoot this issue.
You should disable the trace logs when you have finished troubleshooting.
2025-04-09 04:43:57,606 ERROR [org.apache.activemq.artemis.core.server]
AMQ224079: The process for the virtual machine will be killed, as component
QueueImpl[name=tracker-server.emd.#, postOffice=PostOfficeImpl
[server=ActiveMQServerImpl::name=amq-broker], temp=false]@2aef497c is not
responsive {code}
was:
Since ARTEMIS-4646 MQTT message IDs generated in the cycle but if a client
(malicous ot just bugged) with QoS 1 will not send ACKs and just consume
incoming messages all possible IDs will be used and the cycle goes to infinite
loop. This leads to high CPU usage and even broker self kill by Critical
Analayzer.
{code:java}
2025-04-09 04:43:57,606 WARN
[org.apache.activemq.artemis.utils.critical.CriticalMeasure] Component
org.apache.activemq.artemis.core.server.impl.QueueImpl is expired on path 2
2025-04-09 04:43:57,606 INFO [org.apache.activemq.artemis.core.server]
AMQ224107: The Critical Analyzer detected slow paths on the broker. It is
recommended that you enable trace logs on
org.apache.activemq.artemis.utils.critical while you troubleshoot this issue.
You should disable the trace logs when you have finished troubleshooting.
2025-04-09 04:43:57,606 ERROR [org.apache.activemq.artemis.core.server]
AMQ224079: The process for the virtual machine will be killed, as component
QueueImpl[name=tracker-server.emd.#, postOffice=PostOfficeImpl
[server=ActiveMQServerImpl::name=amq-broker], temp=false]@2aef497c is not
responsive {code}
> High CPU usage in OutboundStore.generateMqttId
> ----------------------------------------------
>
> Key: ARTEMIS-5467
> URL: https://issues.apache.org/jira/browse/ARTEMIS-5467
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: MQTT
> Reporter: Evgeniy Devyatykh
> Priority: Major
>
> Since ARTEMIS-4646 MQTT message IDs generated in the cycle but if a client
> (malicous ot just bugged) with QoS 1 will not send ACKs and just consume
> incoming messages all possible IDs will be used and the cycle goes to
> infinite loop. This leads to high CPU usage and even broker self kill by
> Critical Analyzer.
> {code:java}
> 2025-04-09 04:43:57,606 WARN
> [org.apache.activemq.artemis.utils.critical.CriticalMeasure] Component
> org.apache.activemq.artemis.core.server.impl.QueueImpl is expired on path 2
> 2025-04-09 04:43:57,606 INFO [org.apache.activemq.artemis.core.server]
> AMQ224107: The Critical Analyzer detected slow paths on the broker. It is
> recommended that you enable trace logs on
> org.apache.activemq.artemis.utils.critical while you troubleshoot this issue.
> You should disable the trace logs when you have finished troubleshooting.
> 2025-04-09 04:43:57,606 ERROR [org.apache.activemq.artemis.core.server]
> AMQ224079: The process for the virtual machine will be killed, as component
> QueueImpl[name=tracker-server.emd.#, postOffice=PostOfficeImpl
> [server=ActiveMQServerImpl::name=amq-broker], temp=false]@2aef497c is not
> responsive {code}
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