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| Muhammad Haider |
 Posted: Tue Mar 05, 2019 10:42 pm Post subject: Issue with MQTT implementation in IIB/ACE |
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Apprentice
Joined: 14 Mar 2011
Posts: 43
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| Hi, I tried pub/ in IIB and ACE with different QoS levels but still I am not able to get messages published while the subscriber flow was down. Is there a restriction here in toolkit or at the MQTT server level which is being used by IIB /ACE. |
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| fjb_saper |
| Posted: Wed Mar 06, 2019 3:39 am Post subject: Re: Issue with MQTT implementation in IIB/ACE |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| Muhammad Haider wrote: |
| Hi, I tried pub/ in IIB and ACE with different QoS levels but still I am not able to get messages published while the subscriber flow was down. Is there a restriction here in toolkit or at the MQTT server level which is being used by IIB /ACE. |
So you have no durable subscription and only a dynamic subscription which is down? Why would you ever expect to see a publication when there is no receiver for it? 
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| Muhammad Haider |
| Posted: Wed Mar 06, 2019 6:02 am Post subject: |
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Apprentice
Joined: 14 Mar 2011
Posts: 43
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| How to make a durable subscription using pub/sub nodes that are available in toolkit and the default MQTT broker running. There is no property for retaining messages on topics on the pub/sub nodes. There is just QoS parameter that we can set and I checked setting it to values 0,1,2 on both pub and sub nodes but no difference. Whenever I stop my subscriber flow to simulate a scenario where a subscriber is offline and he wants to receive the messages when he comes online, i don't get any messages that were already published. I think the feature is missing here in IIB/ACE implementation. |
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| abhi_thri |
| Posted: Thu Mar 07, 2019 1:30 am Post subject: |
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Knight
Joined: 17 Jul 2017
Posts: 516
Location: UK
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| Muhammad Haider |
| Posted: Sat Mar 23, 2019 7:39 pm Post subject: |
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Apprentice
Joined: 14 Mar 2011
Posts: 43
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| Nice idea but is it available for MQTT nodes too apart from MQ? Plus how we can retain more than 1 previous messages ? |
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| fjb_saper |
| Posted: Sun Mar 24, 2019 12:40 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Remember that IIB still comes with a restricted MQ license for the broker's queue manager. So use MQ and a durable subscription already...
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