13 incidents everyone hits once
OOMKilled, 502/504, too many open files, expired certificates, leaked keys — the most searched incidents.
0/13
1OOMKilled: a container keeps restarting after hitting its memory limitBeginner15 minFree2502 Bad Gateway: Nginx cannot connect to its upstream after an app upgradeBeginner14 minFree3Too many open files: a systemd service hits its file descriptor limitBeginner15 minFree4docker push: denied: requested access to the resource is deniedBeginner14 minFree5CORS blocks the new admin frontend's API calls with credentialsBeginner14 minFree6504 Gateway Timeout: a slow export endpoint behind a 60-second proxy timeoutIntermediate16 minFree7Pods get Evicted in bulkIntermediate18 minFree8The OOM killer terminates the database during a nightly batchIntermediate18 minFree9Let's Encrypt auto-renewal kept failing until the certificate expiredIntermediate16 minFree10Load average is 40 but the CPU is mostly idle: I/O waitIntermediate16 minFree11A node goes NotReady after a rebootIntermediate16 minFree12S3 AccessDenied: the IAM policy allows it but the bucket policy denies itIntermediate17 minFree13An AWS access key was pushed to a public GitHub repositoryIntermediate18 minFree
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