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[bioontology-support] BioPortal: Questions

redcap redcap at
Thu Oct 18 00:36:28 PDT 2018

Hi Jennifer,

  *   We're still leaning toward some kind of a local front-end caching issue.
As a backend developer I can confirm that a 500 HTTP error is always a backend issue. The error message can always be found in the server logs. If an incorrect argument is given a 4xx should be thrown. Not a 500 which means internal server error.
I can reproduce the problem as well, so it is not browser specific. Steps to reproduce are:

  1.  Login to bioportal. (This problem does not happen if you’re not logged in).
  2.  Browse to the page.
  3.  Expected: The class shows
  4.  Actual: An error page is shown:
[cid:image001.png at 01D466C5.8C697920]
Hopefully this helps.

Kind regards,

Van: Vanderschaeghe Simon Namens redcap
Verzonden: donderdag 18 oktober 2018 9:24
Aan: 'Jennifer Leigh Vendetti' <vendetti at>
CC: support at; redcap <redcap at>
Onderwerp: RE: [bioontology-support] BioPortal: Questions

Hi Jennifer,

I tried navigating to the page in incognito mode, but the error persists.

Kind regards,

Van: Jennifer Leigh Vendetti [mailto:vendetti at]
Verzonden: donderdag 18 oktober 2018 2:18
Aan: redcap <redcap at<mailto:redcap at>>
CC: support at<mailto:support at>
Onderwerp: Re: [bioontology-support] BioPortal: Questions

Hi Simon,

On Oct 17, 2018, at 12:16 AM, redcap <redcap at<mailto:redcap at>> wrote:

My apologies for the delay in answering, I overlooked your emails (obviously).

Not a problem.

I am able to issue a REST call successfully (see screenshot below).

Ok - thanks for checking that. The fact that you’re able to retrieve data successfully for that class would indicate to us that the problem isn’t at the REST API level, or with our backend caching mechanism.

For the other test, I am still getting a 500 error in the Network tab (see below). I performed the test on 2018-10-17T09:14:18+02:00, my user name is simon.vanderschaeghe.

My colleague Michael and I spent some time looking at this today. We were unable to reproduce the 500 error in the BioPortal user interface, either logged in or out of the application. We're still leaning toward some kind of a local front-end caching issue. On that note, I’m wondering if you’d be willing to try opening a new incognito window in Chrome (File -> New Incognito Window), navigating to this class again [1], and letting us know if the error still occurs.

Kind regards,


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