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What is the meaning of 'ExpiryInterval' on dashboard? #2635

xlb0479 opened this issue Jun 18, 2019 · 3 comments


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@xlb0479 xlb0479 commented Jun 18, 2019


  • OS: ubuntu 18
  • Erlang/OTP: 21
  • EMQ: 3.0


Column name 'ExpiryInterval' on the Monitoring->Sessions page, what is the meaning of it? How to set it?

When cleansession set to 0, ExpiryInterval is always 7.

I found the only configuration may be related to it is zone.external.session_expiry_interval but it was set to 2h.

@turtleDeng turtleDeng added the Support label Jun 18, 2019
@turtleDeng turtleDeng added this to the 3.2-rc.1 milestone Jun 18, 2019
@turtleDeng turtleDeng modified the milestones: 3.2-rc.1, 3.2-rc.2 Jun 29, 2019

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@tigercl tigercl commented Jul 1, 2019

Hi, @xlb0479, sorry for later response, the 'ExpiryInterval' you see on the dashboard is actually 'Session Expiry Interval' in MQTT protocol, and its value comes from your CONNECT packet. So, I suggest that you confirm your packet.


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@tigercl tigercl commented Jul 1, 2019

Excuse me for previous reply, this is indeed a bug, we will fix it in next version.


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@gilbertwong96 gilbertwong96 commented Jul 10, 2019

Hi, this bug has been fixed in emqx3.2-rc.3, here is the pull request: #2663

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