Hi I will take a deeper look. Let’s keep in touch.
Regards JB > Le 15 oct. 2021 à 06:45, Wei, Xinjing <wxinj...@amazon.com.invalid> a écrit : > > Hi all, > > I'd like to start a conversation for > AMQ-8306<https://issues.apache.org/jira/browse/AMQ-8306>. > > I have talked to some of the community members and the suggestion was to use > a thread safe list and synchronized keyword. It does resolve the issue we > have but I hesitated on submitting the fix because this could be a change of > behaviour on other customer managed plugins. The fix using synchronized > keyword requires the plugins to always call “service.start()” in the plugin > code and requires the implementation of the “start()” method to always be > "multi-start()-safe". > > Right now there's only one plugin in the Active MQ code base that may hit > this race condition problem, but I don't know 1). if there will be more; 2). > if any existing users have their own plugins that may have used the same > pattern. > We are still discussing the potential solutions but we'd also like to have > this conversation within the Apache Active MQ community for a greater > audience on: > > 1. Whether there are users that implemented custom plugins with the same > pattern as in > MQTTPacketIdGenerator<https://github.com/apache/activemq/blob/activemq-5.15.15/activemq-mqtt/src/main/java/org/apache/activemq/transport/mqtt/MQTTPacketIdGenerator.java#L107>. > 2. If there’s another solution to solve this issue with minimal behavioural > impact > > Thanks in advance. > > Regards, > Xinjing Wei
