{"id":148818,"date":"2025-11-19T11:11:55","date_gmt":"2025-11-19T09:11:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/mnogochasovoj-sboj-cloudflare-okazalsya-rezultatom-nekorrektnoj-obrabotki-oshibok"},"modified":"2025-11-19T11:11:55","modified_gmt":"2025-11-19T09:11:57","slug":"mnogochasovoj-sboj-cloudflare-okazalsya-rezultatom-nekorrektnoj-obrabotki-oshibok","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/mnogochasovoj-sboj-cloudflare-okazalsya-rezultatom-nekorrektnoj-obrabotki-oshibok","title":{"rendered":"Mnohahodinov\u00fd v\u00fdpadek Cloudflare se uk\u00e1zal b\u00fdt v\u00fdsledkem nespr\u00e1vn\u00e9ho zpracov\u00e1n\u00ed chyb","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Spole\u010dnost Cloudflare zve\u0159ejnila anal\u00fdzu jednoho z nejv\u011bt\u0161\u00edch incident\u016f ve sv\u00e9 infrastruktu\u0159e, kter\u00fd v\u010dera zp\u016fsobil, \u017ee v\u011bt\u0161ina s\u00edt\u011b pro doru\u010dov\u00e1n\u00ed obsahu byla nefunk\u010dn\u00ed po dobu v\u00edce ne\u017e 3 hodin. K selh\u00e1n\u00ed do\u0161lo po zm\u011bn\u011b struktury datab\u00e1ze um\u00edst\u011bn\u00e9 ve skladu ClickHouse, po kter\u00e9 se soubor s parametry pro syst\u00e9m proti bot\u016fm zdvojn\u00e1sobil. V datab\u00e1zi byly vytvo\u0159eny duplicitn\u00ed tabulky, zat\u00edmco SQL dotaz pro generov\u00e1n\u00ed souboru jen vytahoval v\u0161echna data ze v\u0161ech tabulek podle kl\u00ed\u010de, bez filtrov\u00e1n\u00ed duplicit. SELECT name, type FROM system.columns WHERE table = 'http_requests_features' order by name;

\"Mnohahodinov\u00fd<\/center> <\/p>\n

Vytvo\u0159en\u00fd soubor se roz\u0161\u00ed\u0159il po v\u0161ech uzlech clusteru, kter\u00fd zpracov\u00e1v\u00e1 p\u0159\u00edchoz\u00ed \u017e\u00e1dosti. V programu pro zpracov\u00e1n\u00ed, kter\u00fd pou\u017e\u00edv\u00e1 tento soubor pro ov\u011b\u0159ov\u00e1n\u00ed, zda je dotaz od bot\u016f, se parametry uveden\u00e9 v souboru ukl\u00e1daly do opera\u010dn\u00ed pam\u011bti a pro ochranu p\u0159ed nadm\u011brnou spot\u0159ebou pam\u011bti byl v k\u00f3du stanoven limit na maxim\u00e1ln\u00ed povolenou velikost souboru. V b\u011b\u017en\u00fdch podm\u00ednk\u00e1ch byla skute\u010dn\u00e1 velikost souboru podstatn\u011b men\u0161\u00ed ne\u017e stanoven\u00fd limit, ale po duplicaci tabulek ho p\u0159ekro\u010dila. <\/p>\n

Probl\u00e9m spo\u010d\u00edval v tom, \u017ee m\u00edsto spr\u00e1vn\u00e9ho zpracov\u00e1n\u00ed p\u0159ekro\u010den\u00ed limitu a pokra\u010dov\u00e1n\u00ed v pou\u017e\u00edv\u00e1n\u00ed p\u0159edchoz\u00ed verze souboru s informov\u00e1n\u00edm monitorovac\u00edho syst\u00e9mu o mimo\u0159\u00e1dn\u00e9 situaci do\u0161lo v programu k havarijn\u00edmu ukon\u010den\u00ed, kter\u00e9 zablokovalo dal\u0161\u00ed p\u0159enos provozu. Chyba byla zp\u016fsobena pou\u017eit\u00edm v k\u00f3du napsan\u00e9m v jazyce Rust metody unwrap() s typem Result.

\"Mnohahodinov\u00fd<\/center> <\/p>\n

Kdy\u017e m\u00e1 hodnota Result stav \u201eOk\u201c, metoda unwrap() vrac\u00ed objekt souvisej\u00edc\u00ed s t\u00edmto stavem, ale pokud v\u00fdsledek nen\u00ed \u00fasp\u011b\u0161n\u00fd \u2014 vol\u00e1n\u00ed zp\u016fsob\u00ed havarijn\u00ed ukon\u010den\u00ed (vyvol\u00e1 se makro \u201epanic!\u201c). Obvykle se unwrap() pou\u017e\u00edv\u00e1 b\u011bhem lad\u011bn\u00ed nebo p\u0159i psan\u00ed testovac\u00edho k\u00f3du a nedoporu\u010duje se pro pou\u017eit\u00ed v pracovn\u00edch projektech.

\"Mnohahodinov\u00fd<\/center>
\"Mnohahodinov\u00fd<\/center>
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Cloudflare \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0440\u0430\u0437\u0431\u043e\u0440 \u043e\u0434\u043d\u043e\u0433\u043e \u0438\u0437 \u043a\u0440\u0443\u043f\u043d\u0435\u0439\u0448\u0438\u0445 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u043e\u0432 \u0432 \u0441\u0432\u043e\u0435\u0439 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435, \u0438\u0437-\u0437\u0430 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0432\u0447\u0435\u0440\u0430 \u0431\u043e\u043b\u044c\u0448\u0430\u044f \u0447\u0430\u0441\u0442\u044c \u0441\u0435\u0442\u0438 \u0434\u043e\u0441\u0442\u0430\u0432\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430 \u043e\u043a\u0430\u0437\u0430\u043b\u0430\u0441\u044c \u043d\u0435\u0440\u0430\u0431\u043e\u0442\u043e\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0439 \u043d\u0430 \u043f\u0440\u043e\u0442\u044f\u0436\u0435\u043d\u0438\u0438 \u0431\u043e\u043b\u0435\u0435 3 \u0447\u0430\u0441\u043e\u0432. \u0421\u0431\u043e\u0439 \u043f\u0440\u043e\u0438\u0437\u043e\u0448\u0451\u043b \u043f\u043e\u0441\u043b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435 \u0411\u0414, \u0440\u0430\u0437\u043c\u0435\u0449\u0451\u043d\u043d\u043e\u0439 \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 ClickHouse, \u043f\u043e\u0441\u043b\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0444\u0430\u0439\u043b \u0441 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430\u043c\u0438 \u0434\u043b\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043f\u0440\u043e\u0442\u0438\u0432\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0431\u043e\u0442\u0430\u043c \u0432 \u0434\u0432\u0430 \u0440\u0430\u0437\u0430 \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u043b\u0441\u044f \u0432 \u0440\u0430\u0437\u043c\u0435\u0440\u0435. \u0412 \u0411\u0414 \u0431\u044b\u043b\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":148819,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-148818","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Dlouhodob\u00fd v\u00fdpadek Cloudflare byl d\u016fsledkem nespr\u00e1vn\u00e9ho zpracov\u00e1n\u00ed chyb | ProHoster","description":"Spole\u010dnost Cloudflare zve\u0159ejnila anal\u00fdzu jednoho z nejv\u011bt\u0161\u00edch incident\u016f ve sv\u00e9 infrastruktu\u0159e, kv\u016fli kter\u00e9mu byla v\u010dera v\u011bt\u0161ina s\u00edt\u011b pro 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