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CF911: Solving problem in ColdFusion Admin getting "error accessing this page" on certain actions

Note: This blog post is from 2014. Some content may be outdated--though not necessarily.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.
Here's a real CF911 challenge (and solution): You may find that when using the CF Admin, especially in CF10 but it can happen in CF 9 or 8 depending on security hotfixes applied, when performing certain Admin operations (like making a change, or verifying datasources, or checking for server updates) you get an error:

"There was an error accessing this page. Check logs for more details."

And your operation fails. You're then prompted to "Click here to login", but even if you back up or client another link, you'll be prompted with the CF Admin login.

What gives? Why is it happening? And how can you fix things? Is CF broken? No, not in the sense that you need to reinstall or anything. The good news is that there is a quite simple solution. Well, there are several, depending on your goals.

The simple solution: delete the duplicate cfid/cftoken or jsessionid cookies that you will find your browser is sending to CF. But there is much more to this, as well as other solutions, which would be worth most readers taking a few minutes to read on here.

BTW, the same root problem can be the cause of your own application's users finding that they can't stay logged in. More on that in a moment.

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The State of the Online ColdFusion Meetup

Note: This blog post is from 2014. Some content may be outdated--though not necessarily.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.
As a follow-up to my previous blog entry today, on news of the CFHour podcast show ending this week, some have wondered (publicly) whether perhaps the Online ColdFusion Meetup, which I host, might help "fill the void" here.

I don't hold that out as a real possibility, for a couple of reasons, and I'd like to discuss them here.

Indeed, it's a good time to share a "State of the Online ColdFusion Meetup", to discuss what you might (and might not) expect to see in the future, and what you can perhaps do to help.

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CFHour going off the air. End of an era? Thanks, Dave and Scott

Note: This blog post is from 2014. 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 haven't heard the news yet, the CFHour podcast has had it's last show, it seems. Dave (Ferguson) and Scott (Stroz) announced the news at the end of their last episode (#213), quietly and without fanfare (or any advanced indications), citing time challenges, etc.

I'm holding a glimmer of hope that it's all an April Fool's prank, but if true it's indeed the end of an era and time to pause and reflect as if on the passing of a friend.

Update: I'm vindicated! :-) The guys announced in their next show that it WAS INDEED an April Fool's prank. Even so, I'll leave this entry, untouched, for posterity. Plus, most of the info is just as valuable to have shared, with them and with readers, whether they did or did not end the show. And like I said below, this gave them a chance like Twain and Nobel to see what folks thought when they thought they were dead. :-)

I also want to give some solace to fans of the show (and the general CFML community) with respect to where they may want to turn now to keep up on news, resources, etc. Fortunately, there are some places being actively updated. (And while surely some will see this as one more nail in CF's coffin, I don't and I'll address that briefly too.)

But first let's give credit where it's due about the podcast...

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