# MathJax net retrieval timeout too long #3040

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opened this Issue Mar 20, 2013 · 11 comments

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### y-p commented Mar 20, 2013

 I had net outage earlier today and launching IPNB failed to get mathjax off the CDN (I wasn't aware you could install a local copy). When the get timed out the resulting message was incredibley helpful, but it only appeared after a wait of about 60 seconds, which makes it less helpful. Perhaps a shorter timeout would improve things? or, if you need to give the net adequate time, perhaps it would do to pop up a status message after a few seconds that tells the user that a dl is pending, and let's him abort to get the full message.
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### minrk commented Mar 20, 2013

 I don't think that's our timeout, I think that's just the browser's own request failing. I'm not sure we have access to that knob. For instance, if you load with no internet connection, rather than a barely functional one, the request will fail immediately.
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### y-p commented Mar 20, 2013

 I get a "Loading from CDN message" in the shell where I ran notebook immediately after launching. That's actually mirroringa console.log a message I believe. it's only 60 secs later that the message appears, maybe a setTimout somewhere can measure How long the fetch is taking. I'll see if I can repro this for more details.
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### y-p commented Mar 20, 2013

 I was able to reproduce this: if the network interface is down, the error message appears immediately if it's up but the network is down (bad downstream router for example) the delay I described occurs. it looks like when mathjax is loaded from the cdn, it's done using a script tag in the head, which blocks. Example. possibly you could load mathjax async under a controlled timeout via a script loader in the body random google link on "how
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### y-p commented Mar 20, 2013

 is that cross-browser?
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### minrk commented Mar 20, 2013

 We don't support IE9, so that should be fine.
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### Carreau commented Mar 20, 2013

 IE, so in particular IE9, is an experimental aberration. I'm not even sure IPython runs on IE9. And the async would be usefull only in some cases when network is bad.
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### y-p commented Mar 20, 2013

 Fair enough. I don't use IE myself, but often people care about their market share. Personally I think they held the web back 5 years with their Idiosyncratic browser.
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### minrk commented Mar 20, 2013

 The notebook is not big on universal support - we depend on websockets and flexible-box-model, so it only works properly in Firefox and WebKit Browsers (Chrome/Chromium/Safari). Opera and IE 10 can execute, but layout is all wonky, and we have no intention of fixing that, especially now that Opera is moving to WebKit, so should work properly in the future.