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HTTPS monitor suddenly stopped working. http works fine on same nodes. what could cause this, newbie here

I have a customer environment where the HTTP monitors are just fine, but the HTTPs monitors have suddenly stopped. it is using the default https monitor and the monitor is operating correctly on other https nodes. that seems to me that that would be on the customer side since the only thing specific about it is the individual node itself on port 443. if it was a monitor issue, especially a default one, it would seem the issue would be spread further. Does anyone have any insight to simple issues this could be or is everyone of the same mind that this looks like a customer side issue?

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HTTPS monitor failed working on some nodes but it is working well on other nodes ? If so, is it possible to see what was changed at the server level ?

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Comment made 08-Aug-2016 by jerm1020 156

that is my thoughts, I am going to have to check with the customer, since it appears the monitor itself is working fine, except on that specific server. does this seem logical? just trying to do a sanity check on myself

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Comment made 08-Aug-2016 by Vijay 4944

You can also execute CURL from the F5's bash shell to check the response of the server and compare it with that of other servers and expected response per monitor.

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You can also enable Monitor Logging on that pool member and check the logs (/var/log/monitors/). The log will give you a better idea of what is going on with that server failling the https monitor.

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