6

A couple of days ago everything worked perfectly on my chrome, today I only see the tex source of all the math formulas, I have no clue why. I did not change any settings, maybe I've updated my chrome like a week ago. How can I fix this?

  • Maybe MathJax client side library is blocked on your side. What you see when browsing directly to cdn.mathjax.org/mathjax/latest/…? – Shadow Wizard Mar 19 '15 at 7:15
  • @Shadow: It says This webpage is not available. – domotorp Mar 19 '15 at 7:26
  • Try with a different browser to check if it's browser issue or global block on your side, e.g. proxy/firewall/ISP. – Shadow Wizard Mar 19 '15 at 7:50
  • 1
    @Shadow: Now after I've refreshed, it works again. Before I had also tried refreshing, but then it was no help. I leave the question here as it's an issue that others might have and it would be nice to know how to fix. – domotorp Mar 19 '15 at 8:59
  • 1
    Now cdn.mathjax.org is down, at least when accessd from my area (Czech Republic). Only LaTeX source displays on Mathematics. Maybe they have problems lately. – Palec Mar 22 '15 at 18:14
  • Fwiw, it works from NY USA. @Palec do a traceroute maybe? – Jason C Mar 22 '15 at 18:21
  • @JasonC Obviously it’s not just my problem. In this test, Asia is OK, Europe and US time out. monitis.com/traceroute/… In my area, the hostname fails to be resolved. – Palec Mar 22 '15 at 18:34
  • 1
    @Palec Maybe some DNS changes somewhere? In which case it should fix itself at some point in the near future. I wonder if it works if you change your DNS servers to 8.8.8.8 or something. Just out of curiosity, what is your current primary DNS server? – Jason C Mar 22 '15 at 18:35
  • @JasonC $ dig cdn.mathjax.orgconnection timed out; no servers could be reached, $ dig cdn.mathjax.org @8.8.8.8 → no answer section. But a minute after it caught up and now both Google and my DNS return correct results and MathJAX on Math.SE works. – Palec Mar 22 '15 at 18:42
  • And here we go again. The same problem. – Palec Mar 22 '15 at 19:14
  • Now I noticed your question about primary DNS server, @JasonC. I resolve using my TP-LINK Wl841N router, it uses the resolver of my ISP. What goes next? Who knows… – Palec Mar 22 '15 at 21:01
  • Repro is Ohio. isup.me seems to agree it's down – bjb568 Mar 24 '15 at 22:08
6

Ah, it looks like a concrete answer has been given over at Math's meta by Peter Krautzberger:

Peter from the MathJax team here. Our CDN provider has been experiencing attacks on some of its DNS servers (see also this thread on the MathJax User Group).

This attack leads to erratic DNS resolution failures. We're sorry for the inconvenience this is causing users and we'll send out an update as soon as we get any news.

  • 2
    Thanks for cross posting and sorry for not catching this post here last week. Sorry for the inconvenience everyone! We hope the attack will be mitigated soon. – Peter Krautzberger Mar 24 '15 at 22:33

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .