18Your service is collecting thousands of CLOSE_WAIT sockets. What does that state mean and how do you hunt the cause?▼hard★ EssentialNewNetflixUberLinkedInunlockedA growing backlog of sockets waiting for the application to close its side usually points at lifecycle handling. Here is the hunt from ss output to the pool timeout that caused it.Open full answer →
59A service starts refusing connections with 'too many open files' after about six hours, every time. Find it.▼mediumNewUberDatadogCloudflare◆ premiumRaising the limit buys hours and proves nothing. The six-hour periodicity is the diagnosis: something is opening descriptors on a code path that never closes them.Open full answer →
