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Resolved Error: Failed to load Web Application

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  1. David Vasconcelos
    David Vasconcelos
  2. PowerServer 2020 or older (Obsolete)
  3. Tuesday, 8 October 2019 12:45 PM UTC

We just started to get the following error when trying to access our web app.  We have restarted IIS, the server itself and reloaded the application and still no luck.  Has anyone encountered this issues and if so what steps to find the cause.

 

Failed to load Web Application

(Win10, PB2017r3, Powerserver 2017, IIS)

 

Note: In IE I get the failed error in Chrome it just shows an empty screen.

 

Thanks in advance.

Dave V.

PowerServer ToolKit version used to deploy the app...
Failed to save with no error
Responses (6)
David Vasconcelos
David Vasconcelos Accepted Answer Pending Moderation
  1. Thursday, 17 October 2019 16:04 PM UTC
  2. PowerServer 2020 or older (Obsolete)
  3. # 1

It is now working again... but no one from our security/network team has let us know what may have been the issue.

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Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Thursday, 17 October 2019 17:15 PM UTC
Poltergeists! ;-)
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Kai Zhao @Appeon
Kai Zhao @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 9 October 2019 00:48 AM UTC
  2. PowerServer 2020 or older (Obsolete)
  3. # 2

Hi David,

What's the detail error on IE? Since you run the app from the server it works, it seems a firewall issue, please try if you can access AEM and site directly on client.
For example:
http://ip:port
http://ip:port/AEM

Regards,
ZhaoKai

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Armeen Mazda @Appeon
Armeen Mazda @Appeon Accepted Answer Pending Moderation
  1. Tuesday, 8 October 2019 17:55 PM UTC
  2. PowerServer 2020 or older (Obsolete)
  3. # 3

Try going through the troubleshooting guide steps for all the messages related to what you are experiencing: https://docs.appeon.com/appeon_online_help/ps2019/appeon_troubleshooting_guide/ch04s01.html

Especially these three stand out to me as worth trying:

https://docs.appeon.com/appeon_online_help/ps2019/appeon_troubleshooting_guide/ch04s01s03.html

https://docs.appeon.com/appeon_online_help/ps2019/appeon_troubleshooting_guide/ch04s01s09.html

https://docs.appeon.com/appeon_online_help/ps2019/appeon_troubleshooting_guide/ch04s01s10.html

 

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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Tuesday, 8 October 2019 14:26 PM UTC
  2. PowerServer 2020 or older (Obsolete)
  3. # 4

Hi David;

   Also (FWIW), I would also suggest checking the PowerServer log files.

Regards ... Chris

 

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David Vasconcelos
  1. David Vasconcelos
  2. Tuesday, 8 October 2019 14:40 PM UTC
Did check the log files and they were empty. I did have the admin clear them out before we try to run app so I see only what is happening today. (We did look at them before we cleared them out and there was no sign of errors.)
  1. Helpful
David Vasconcelos
  1. David Vasconcelos
  2. Tuesday, 8 October 2019 14:42 PM UTC
One other strange thing. We have one machine which was not rebooted since last week and for some reason it can run the web app.
  1. Helpful
Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Tuesday, 8 October 2019 14:56 PM UTC
Hi David - If the PS Logs are empty ... then the issue is most likely outside of PS. Sounds more like an IIS / Firewall / /Windows Policy/ AV issue now to me. The fact that one PC can still run might certainly be network PORT related issue. Many systems do not check the port restrictions once an IP/Port combo has been opened & stays open.
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David Vasconcelos
David Vasconcelos Accepted Answer Pending Moderation
  1. Tuesday, 8 October 2019 13:12 PM UTC
  2. PowerServer 2020 or older (Obsolete)
  3. # 5

Were waiting for our IT to get back to us, we know there was a firewall change but don't know what they did.  I did redeploy the app just in case.  There was also a Microsoft Update that happened on the server.  what is also strange is that if we log directly into the server and run the app from the server it works.

Comment
mike S
  1. mike S
  2. Tuesday, 8 October 2019 13:17 PM UTC
how do you deploy? via install of exe or via ftp?



the microsoft update is unlikely to have caused the problem
  1. Helpful
David Vasconcelos
  1. David Vasconcelos
  2. Tuesday, 8 October 2019 13:21 PM UTC
We create the install package and copy it to the server and install it from there. The app was running fine until Saturday morning when we got emails that users could not access the app. Were hoping it was the firewall change, what I have noticed on the IIS log file is no GET on xml files are showing up, so they maybe blocking files.
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mike S
mike S Accepted Answer Pending Moderation
  1. Tuesday, 8 October 2019 13:02 PM UTC
  2. PowerServer 2020 or older (Obsolete)
  3. # 6

what changed since the last time it ran for you?

Did you deploy to it again?

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