{"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\/it\/blog\/news\/mnogochasovoj-sboj-cloudflare-okazalsya-rezultatom-nekorrektnoj-obrabotki-oshibok","title":{"rendered":"Il malfunzionamento prolungato di Cloudflare si \u00e8 rivelato il risultato di una gestione errata degli errori.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

L'azienda Cloudflare ha pubblicato un'analisi di uno dei pi\u00f9 grandi incidenti nella sua infrastruttura, che ieri ha reso gran parte della rete di distribuzione dei contenuti non operativa per oltre 3 ore. Il guasto \u00e8 avvenuto dopo una modifica nella struttura del database, ospitato su ClickHouse, a seguito della quale il file con i parametri per il sistema di contrasto ai bot \u00e8 aumentato di dimensione di due volte. Nel database sono state create tabelle duplicate, mentre la query SQL per generare il file estraeva semplicemente tutti i dati da tutte le tabelle tramite la chiave, senza escludere i duplicati. SELECT name, type FROM system.columns WHERE table = 'http_requests_features' order by name;

\"Il<\/center> <\/p>\n

Il file creato si \u00e8 diffuso attraverso tutti i nodi del cluster che gestisce le richieste in ingresso. Nel gestore che utilizza questo file per verificare le richieste provenienti da bot, i parametri indicati nel file venivano memorizzati nella memoria volatile e, per proteggere da un eccessivo consumo di memoria, nel codice era stato previsto un limite sulla dimensione massima consentita del file. In condizioni normali, la dimensione effettiva del file era significativamente inferiore al limite stabilito, ma dopo la duplicazione delle tabelle ha superato il limite. <\/p>\n

Il problema risiedeva nel fatto che, invece di gestire correttamente il superamento del limite e continuare a utilizzare la versione precedente del file informando il sistema di monitoraggio della situazione anomala, nel gestore si attivava una terminazione di emergenza, che bloccava ulteriormente il passaggio del traffico. L'errore \u00e8 stato causato dall'uso nel codice scritto in Rust del metodo unwrap() con il tipo Result.

\"Il<\/center> <\/p>\n

Quando il valore Result ha stato 'Ok', il metodo unwrap() restituisce l'oggetto associato a questo stato, ma se il risultato non \u00e8 un successo - la chiamata porta a un'interruzione (viene chiamato il macro 'panic!'). Di solito, unwrap() \u00e8 utilizzato durante il debug o nella scrittura di codice di test e non \u00e8 raccomandato per l'uso in progetti produttivi.

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

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\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\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\udd47Il malfunzionamento di molte ore di Cloudflare \u00e8 stato il risultato di un'errata gestione degli errori | ProHoster","description":"L'azienda Cloudflare ha pubblicato l'analisi di uno dei pi\u00f9 grandi incidenti nella sua infrastruttura, a causa del quale ieri una gran parte della rete di distribuzione dei contenuti \u00e8 stata non operativa per oltre 3 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