This sounds kind of like retroactive consumers (
http://activemq.apache.org/retroactive-consumer.html); are you using that
feature?
Are you able to reproduce this reliably in a test environment where you can
change things and see the effects? If so, does the problem occur with
non-durable subscri
3 mqttClent （c1,c2,c3,c4,c5）;mqttclent setClindId,cleansession=false;
activemq 5.12.0 (or befor)
test topic(T)
1 c1,c2,c3 subscribe T
2 c5 send message m1 to T
3 c1,c2,c3 received m1
...sometimes (problem occurs)
4c1 unsubscribe T
5c5 send message m2 to T (b c receive
> （sorry，i‘m not good at english）
speak in Java then ;), show an example and the exception or error
that's happening.
Also include the version of ActiveMQ where this is happening.
