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nLab > nLab Technical Matters: 500 error

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1 to 15 of 15

  1.  
    • CommentRowNumber1.
    • CommentAuthorTodd_Trimble
    • CommentTimeJul 27th 2018

    Produced when I tried to save a newly created article, limit compact space.

  2. On it.

    • CommentRowNumber3.
    • CommentAuthorRichard Williamson
    • CommentTimeJul 27th 2018
    • (edited Jul 27th 2018)

    Thanks very much for reporting this, Todd. It should be fixed now. I am very sorry if you lost any work, and apologise in any case for the inconvenience.

    I often contrive to forget that the codebase actually handles, in the end, page creations through the same methods as revisions! That is what happened in this case: the new renderer needs a page ID, and that is not present until a page (which is kind of a meta-object in the codebase; a ’revision’ is where all the meat is) has been created. I have tweaked things now so that the ’meta’ page object is created before the revision; if the content fails to parse, so that the meta object would have no associated revision, the ’meta’ object is removed again. In very extreme circumstances (those that would lead to an Exception which is not a StandardError being thrown in Ruby), it is possible that the meta object might not be cleanly removed, but clearing that up is likely to be the least of our worries in such an eventuality, so I think this ’assume everything will be OK and clean up if not’ approach is reasonable for the moment.

    • CommentRowNumber4.
    • CommentAuthorTodd_Trimble
    • CommentTimeJul 27th 2018

    No, it’s saved! And looking as it should. Thanks for all your work!

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeJul 28th 2018
    • (edited Jul 28th 2018)

    Just for the record, I am still getting the 500 error when saving.

    Just tried to re-save geometry of physics – basic notions of category theory in order to make its broken links refresh, but am getting 500 on that…

  6. Thanks very much for reporting this, Urs. I have begun looking into it, and believe that this problem is restricted only to a very small number of pages, probably only ones in the geometry of physics series. Shouldn’t be a problem to fix, but may take a little while today before I get to it. Apologies for the inconvenience.

  7. Hi Urs, I believe this 500 error should be fixed now. Was able to save a trivial edit to the page just now. Please let me know if you see anything else that is broken.

    • CommentRowNumber8.
    • CommentAuthorUrs
    • CommentTimeJul 28th 2018
    • (edited Jul 28th 2018)

    Thanks, Richard!! Yes, it saves fine now.

    There is still a remaining issue with the redirects. I tried to resave a few more entries in order to fix that, but now this doesn’t seem to have an effect anymore.

    For instance, right now, on my machine, all links to small categories don’t redirect to small category, even after re-saving the latter entry. (?)

  9. Hi Urs, as you will have seen, I’ve now discussed this on the other thread. Redirects are, I believe, working correctly in general, but there will be issues until we remove duplicate redirects, because these prevent pages from being rendered by the new renderer.

    • CommentRowNumber10.
    • CommentAuthorDavid_Corfield
    • CommentTimeJul 30th 2018
    • (edited Jul 30th 2018)

    I got a 500 error when editing coinductive type. I had clicked on the link terminal coalgebra of an endofunctor which took me to a ’create page’, so I thought to change ’of’ to ’for’, but then received.

    This page contains the following errors:

    error on line 316 at column 45: Double hyphen within comment: <!– exception:

    765: unexpected token at 'Hell

    Below is a rendering of the page up to the first error.

    It’s odd because placing the arrow on that link suggests it goes to an existing page, and the correct redirect is there at terminal coalgebra for an endofunctor.

  11. This was a consequence of the issues mentioned in #43 here. Now fixed. Indeed, I am optimistic that, with the exception of a very small number of pages (no real pattern to them, just a very occasional one; I will look into these later), things are finally coming into shape.

    • CommentRowNumber12.
    • CommentAuthorTodd_Trimble
    • CommentTimeJul 30th 2018

    The redirect for metrizable space is still not working for me. (Tried from Urysohn metrization theorem.)

    • CommentRowNumber13.
    • CommentAuthorUrs
    • CommentTimeJul 30th 2018

    Currently many redirects are still broken. Entries with lots of them include for instance Lie integration.

    But I gather Richard said that in the background all pages are being re-rendered in order to make, eventually, the redirects come back.

  14. Yes, exactly, what Urs wrote in #10 is correct.

    The relevant page in this case for #12, metrisable topological space, has an id in the 18000s, whereas we are still between 1000 and 2000 for the rendering (though some later pages are also being rendered, because the renderer follows a tree through the wiki to fill in missing links). I triggered it manually for you, to get it to render.

    • CommentRowNumber15.
    • CommentAuthorTodd_Trimble
    • CommentTimeJul 30th 2018

    Re #13: right, I remembered Richard said that, but I estimated I had waited enough hours. I didn’t know the time scale that was involved.

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