Last modified: 2014-10-08 14:43:56 UTC
I'm getting Time-out errors every time I review a math article and rewrite many of its formulas. The most recent example is https://pt.wikipedia.org/w/index.php?diff=prev&oldid=37303227 where I got ---------------------- 504 Gateway Time-out nginx/1.1.19 ---------------------- But, if I remeber correctly, this edit also caused the same error: https://pt.wikipedia.org/w/index.php?diff=prev&oldid=37279458 and I'm certain there was more cases before this. In all cases the edit seems to be saved anyway. Maybe it is related to bug 53400?
When I tried to replicate the first edit above on English Wikipedia, the error was this: Request: POST http://en.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&action=submit, from 208.80.154.8 via cp1002.eqiad.wmnet (squid/2.7.STABLE9) to 10.64.0.130 (10.64.0.130) Error: ERR_READ_TIMEOUT, errno [No Error] at Fri, 08 Nov 2013 13:15:35 GMT and the edit was not saved. Then I tried again and it was saved without problem: https://en.wikipedia.org/w/index.php?diff=580753031&oldid=580752780 Then I used the content of the link https://pt.wikipedia.org/w/index.php?title=Espa%C3%A7o_vetorial&action=edit&oldid=37279458 and got: Request: POST http://en.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&action=submit, from 10.64.0.138 via cp1008.eqiad.wmnet (squid/2.7.STABLE9) to 10.2.2.1 (10.2.2.1) Error: ERR_READ_TIMEOUT, errno [No Error] at Fri, 08 Nov 2013 13:26:34 GMT but this time the edit was saved: https://en.wikipedia.org/w/index.php?title=Wikipedia:Sandbox&diff=prev&oldid=580753431
Helder: Is this still a problem?
Yes: I just copied the code from first link above to https://pt.wikipedia.org/wiki/WP:P%C3%A1gina_de_testes/1?diff=37413683 and then made the replacement /<math>/g --> <math>bug to generate new formulas. The result was this (and the edit was not saved): Request: POST http://pt.wikipedia.org/w/index.php?title=Wikip%C3%A9dia:P%C3%A1gina_de_testes/1&action=submit, from 208.80.154.51 via cp1052 frontend ([10.2.2.25]:80), Varnish XID 1553287318 Forwarded for: 143.107.45.11, 208.80.154.51 Error: 503, Service Unavailable at Mon, 18 Nov 2013 10:00:15 GMT Then (after a few minutes) I hit the back button from my browser and clicked save again. The edit was saved but the error persisted: Request: POST http://pt.wikipedia.org/w/index.php?title=Wikip%C3%A9dia:P%C3%A1gina_de_testes/1&action=submit, from 208.80.154.51 via cp1068 frontend ([10.2.2.25]:80), Varnish XID 3606772663 Forwarded for: 143.107.45.11, 208.80.154.51 Error: 503, Service Unavailable at Mon, 18 Nov 2013 10:04:59 GMT
On Portuguese Wikibooks, I also get an error message when I save edits in which lots of formulas[1] are changed: Request: POST http://pt.wikibooks.org/w/index.php?title=Matem%C3%A1tica_elementar/Trigonometria/Lei_dos_senos_e_dos_cossenos&action=submit, from 208.80.154.9 via cp1065 frontend ([10.2.2.25]:80), Varnish XID 2785820477 Forwarded for: 200.144.188.135, 208.80.154.9 Error: 503, Service Unavailable at Wed, 20 Nov 2013 09:59:28 GMT [1] Example: https://pt.wikibooks.org/w/index.php?diff=264420&oldid=264419
It happened again: https://pt.wikibooks.org/w/index.php?diff=264423 Request: POST http://pt.wikibooks.org/w/index.php?title=Matem%C3%A1tica_elementar/Polin%C3%B4mios&action=submit, from 208.80.154.9 via cp1066 frontend ([10.2.2.25]:80), Varnish XID 3663099635 Forwarded for: 200.144.188.135, 208.80.154.9 Error: 503, Service Unavailable at Wed, 20 Nov 2013 10:44:44 GMT
Some eval.php profiling. > $title = Title::newFromText( 'Math page' ); > $text = ''; for ( $i=0; $i<100; ++$i ) { $text .= "<math>i = " . mt_rand( 0, 2000000000 ) . "</mat h>\n"; } > $content = ContentHandler::makeContent( $text, $title ); > $content->getParserOutput( $title ); > wfLogProfilingData(); <!-- 100.00% 93.631767 1 - -total 99.96% 93.597670 1 - Parser::parse 99.96% 93.597645 1 - Parser::parse-call_user_func_array 99.84% 93.479773 317 - PPFrame_DOM::expand 99.83% 93.474312 1 - Parser::internalParse 99.83% 93.472083 5 - Parser::replaceVariables 99.74% 93.385419 100 - MathHooks::mathTagHook 98.58% 92.301875 100 - MathTexvc::callTexvc 31.91% 29.878679 100 - FileBackendStore::doQuickOperationsInternal-global-swift 31.90% 29.865421 100 - FileBackendStore::storeInternal-global-swift 24.23% 22.683115 100 - FileBackendStore::doQuickOperationsInternal-global-swift-eqiad 24.21% 22.667449 100 - FileBackendStore::storeInternal-global-swift-eqiad 4.10% 3.843399 100 - FileBackendStore::doPrepare-global-swift 0.96% 0.894944 100 - FileBackendStore::doPrepare-global-swift-eqiad 0.79% 0.738057 100 - MathTexvc::writeCache 0.59% 0.550794 100 - DatabaseBase::query-master 0.58% 0.545479 100 - query-m: REPLACE INTO `math` (math_inputhash,math_outputhash,math_html_con servativeness,math_html,math_mathml) VALUES ('X')
Change 103644 had a related patch set uploaded by Aaron Schulz: Buffer png writes and flush them all at once https://gerrit.wikimedia.org/r/103644
Change 103644 merged by Physikerwelt: Buffer png writes and flush them all at once https://gerrit.wikimedia.org/r/103644
I'm really unhappy that nobody is reviewing math 2.0 which would resolve all the unnecessary interactions with the file system. It takes a lot of time to manually rebase the change over and again. Compar this change: Uploaded Dec 25, 2013 9:39 AM Updated Dec 27, 2013 11:42 AM (merged) with that one https://gerrit.wikimedia.org/r/#/c/85801/ Uploaded Sep 24, 2013 2:28 AM ...
I was going to just wait, but it figured I may as well make a simple fix to help now. I did checkout Math 2.0 out of curiousity a few days ago, but all the pngs just were replaced with "texvc not found" errors and I ended up doing other things.
Yes this happens if texvccheck is not compiled, since the binaries are ignored in the .gitignore file. If you switch to texvccheck and run make there the problem should disappear.
Patch was merged a while ago - is there more work left to do here (if yes: please reset the bug report status to NEW or ASSIGNED), or can you close this ticket as RESOLVED FIXED?
