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CF911: Want to monitor ColdFusion "out of process" (from outside the instance itself)? Many ways.

Note: This blog post is from 2012. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
I just blogged about how the hidden gem "enable monitoring server" option in CF 9.0.1 does NOT cause the CF Server Monitor to somehow magically run "out of process". See more on that.

Yet people will reasonably want to be able to have some mechanism that "watches" CF "from the outside", to know when it's gone down. How can you do that? That's what I'll point out in this entry.

And beyond talking about what goes along with the CF Enterprise Server Monitor, I'll also point out options for those who are NOT running CF 8, 9, or 10 Enterprise and therefore do not have the Enterprise Server Monitor. This also includes those CF 6 or 7. There are solutions for you, and also for those running Railo, BD, or indeed any Java server. More on all that in a moment.

This is part 4 of an unexpected series of entries today on the CF Enterprise Server Monitor. :-) I got on a roll, and each seemed deserving of its own topic. See the "Related Blog Entries" below this entry for links to those.

What the CF Server Monitor is, and is not

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CF911: "Enable Monitoring Server" option (new in ColdFusion 9.01) DOES NOT monitor "out of process"

Note: This blog post is from 2012. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
Have you been led to believe that the "Enable Monitoring Server" option (new in the CF 9.0.1 Admin) somehow magically runs the CF Enterprise Server Monitor "out of process". Sadly, even some folks from Adobe have and still may assert that. It's just not true. So what is this option about, then? I'm not denying its value. I just want to clarify it.

BTW, today is "more about the CF Server Monitor" day today here at carehart.org. :-) In my last two entries today, I talked about related matters, regarding the impact of the 3 "start" buttons (monitoring, profiling, and memory tracking), as a followup to an older entry I did on them when the monitor came out with CF 8 in 2007. See the "related blog entries" below for more.

In the last entry, I mentioned that in 9.0.1, Adobe added a new "Monitoring Settings" page to the CF Admin, and one of the features is that ability I discussed to turn off the 3 start buttons from within the Admin.

Below that is this other feature, labeled "Enable Monitoring Server". Let me say first that has really have nothing to do with all the discussion of the "start" buttons in the previous entries.

So what does "Enabling Monitor Server" do?

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CF911: Disabling the ColdFusion Server Monitor "start" buttons, when you can't get into the Monitor

Note: This blog post is from 2012. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
Many know I'm a big fan of CF monitoring, whether with CF Server Monitor, FusionReactor, or SeeFusion. I've written plenty on each (see the categories to the right here).

But the CF Server Monitor does have an Achilles Heel: you may turn on one of its "start" buttons, especially "memory tracking", and find that it's crippling your server. You may not be able to then turn off the feature.

I talked about this potential issue in an entry when CF 8 was released back in 2007, CF Server Monitor: what's the impact on production? you may be surprised. I clarify there that the monitor will not, as some assert, "always kill your server". See that for more details.

And I discussed in an entry earlier today that you can't just "close the monitor" or even restart CF to make the problem go away, because that won't stop the functionality. See CF911: Using the #ColdFusion Server Monitor? Be aware that the "Start" buttons remain enabled.

So what if you are in a situation where using one of the features, especially typically "memory tracking", has in fact sent your server into a tizzy. If you can't even get into the monitor to turn it off, you're going to be in quite a pickle, and understandably panicked.

Easy solution if you're on CF 9.0.1

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CF911: Using the ColdFusion Server Monitor? Be aware that the "Start" buttons remain enabled

Note: This blog post is from 2012. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
If you use the CF Enterprise Server Monitor (in CF 8, 9, or 10), it's vital that you understand that if you turn on any of the Start buttons at the top ("Start Monitoring", "Start Profiling", or "Start Memory Tracking"), the settings they enable in CF STAY TURNED ON, even if you close the monitor, and EVEN IF YOU RESTART CF.

Why is this important? Well, I discussed the impact of these buttons (which can be severe or negligible, depending on certain factors) in a blog entry I wrote back in 2007 when CF8 was released.

And today someone was kind enough to point it out to someone on Twitter, so I took a look at it and tweaked it a bit to give some more context. While doing that, I realized I'd never mentioned this fact about the "start" buttons, and about an important related change in CF 9.01 (and 10), thus this entry.

The buttons remain enabled over CF restart or closing the monitor

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