{"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\/pt\/blog\/news\/mnogochasovoj-sboj-cloudflare-okazalsya-rezultatom-nekorrektnoj-obrabotki-oshibok","title":{"rendered":"A falha prolongada do Cloudflare foi resultado de um tratamento incorreto de erros.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A empresa Cloudflare publicou uma an\u00e1lise de um dos maiores incidentes em sua infraestrutura, que fez com que a maior parte da rede de entrega de conte\u00fado ficasse inoperante por mais de 3 horas. A falha ocorreu ap\u00f3s uma altera\u00e7\u00e3o na estrutura do banco de dados, armazenado no ClickHouse, que resultou em um aumento de duas vezes no tamanho do arquivo com os par\u00e2metros para o sistema de mitiga\u00e7\u00e3o de bots. No banco de dados, foram criadas tabelas duplicadas, enquanto a consulta SQL para gerar o arquivo simplesmente extra\u00eda todos os dados de todas as tabelas pela chave, sem filtrar duplicatas. SELECT name, type FROM system.columns WHERE table = 'http_requests_features' order by name;

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

O arquivo criado se espalhou por todos os n\u00f3s do cluster que processa as requisi\u00e7\u00f5es de entrada. No manipulador que usa esse arquivo para verificar acessos de bots, os par\u00e2metros especificados no arquivo eram armazenados na mem\u00f3ria e, para evitar o consumo excessivo de mem\u00f3ria, o c\u00f3digo tinha um limite para o tamanho m\u00e1ximo do arquivo permitido. Em condi\u00e7\u00f5es normais, o tamanho real do arquivo era significativamente menor do que o limite imposto, mas ap\u00f3s a duplica\u00e7\u00e3o das tabelas, superou o limite. <\/p>\n

O problema estava na falta de um tratamento adequado para a supera\u00e7\u00e3o do limite e na continuidade do uso da vers\u00e3o anterior do arquivo, com a notifica\u00e7\u00e3o do sistema de monitoramento sobre a situa\u00e7\u00e3o de emerg\u00eancia; em vez disso, o manipulador falhava, bloqueando o fluxo de tr\u00e1fego. O erro foi causado pelo uso do m\u00e9todo unwrap() em Rust com o tipo Result.

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

Quando o valor Result tem o estado 'Ok', o m\u00e9todo unwrap() retorna o objeto associado a esse estado, mas se o resultado n\u00e3o for bem-sucedido \u2014 a chamada provoca um t\u00e9rmino an\u00f4malo (o macro 'panic!' \u00e9 acionado). Normalmente, unwrap() \u00e9 usado durante a depura\u00e7\u00e3o ou na escrita de c\u00f3digo de teste e n\u00e3o \u00e9 recomendado para uso em projetos de produ\u00e7\u00e3o.

\"A<\/center>
\"A<\/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\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\udd47A falha de v\u00e1rias horas da Cloudflare foi resultado de um tratamento inadequado de erros | ProHoster","description":"A Cloudflare publicou uma an\u00e1lise de um dos maiores incidentes em sua infraestrutura, que fez com que grande parte da rede de entrega de conte\u00fado ficasse fora do ar por mais de 3 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