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Date: Fri, 3 Feb 2017 03:39:04 -0800 (PST)
From: francesco81 <Francesco.PADOVANI@bticino.it>
To: users@activemq.apache.org
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Subject: Re: ARTEMIS: bad-performance behaviour after 7-10 days of usage
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archived-at: Fri, 03 Feb 2017 11:42:07 -0000

Hi Clebert,
ok, we will build some junit tests to replicate the problem, follwing the
exemple section.
Meanwhile, I can confirm to you the bug(s): it seems that the reference to
the message is never removed from the queue. If the message is not retained
it persists 1 reference on the queue and every time my client reconnect to
the broker it will receive always the same message. If the message is
retained is even worse, because it goes to increment the references on the
queue and every time the client connects to the broker it will receive n + 1
times the same retained message where n is the re-connection number n.
Following a simple test I made by using mosquitto client:

CLIENT 1 (publisher):
mosquitto_pub -h <host> -q 1 -i <client_id_pub> -t
/cro/plantid/0000000/gwid/00001/device_state -m "test non retained"

CLIENT 2 (subscriber):
1 connection:
mosquitto_sub -h <host> -q 2 -i <client_id_sub> -t
/cro/plantid/0000000/gwid/00001/device_state
--> received:
*test non retained*
2 connection:
mosquitto_sub -h <host> -q 2 -i <client_id_sub> -t
/cro/plantid/0000000/gwid/00001/device_state
--> received again:
*test non retained*
3 connection:
mosquitto_sub -h <host> -q 2 -i <client_id_sub> -t
/cro/plantid/0000000/gwid/00001/device_state
--> received again:
*test non retained*
...
and so on

CLIENT 1 (publisher):
mosquitto_pub -h <host> -q 1 -i <client_id_pub> -r -t
/cro/plantid/0000000/gwid/00001/device_state -m "test retained"

CLIENT 2 (subscriber):
4 connection:
mosquitto_sub -h <host> -q 2 -i <client_id_sub> -t
/cro/plantid/0000000/gwid/00001/device_state
--> received:
*test retained
test non retained
test retained*
5 connection:
mosquitto_sub -h <host> -q 2 -i <client_id_sub> -t
/cro/plantid/0000000/gwid/00001/device_state
--> received:
*test retained
test non retained
test retained
test retained*
6 connection:
mosquitto_sub -h <host> -q 2 -i <client_id_sub> -t
/cro/plantid/0000000/gwid/00001/device_state
--> received:
*test non retained
test retained
test retained
test retained
test retained*
...
and so on.

If you agree, I would open a bug for this.

Francesco


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