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Chris LuandGitHub
46ce2c45a2
* mini: reserve the admin gRPC port instead of binding it late Port selection probes every port with a throwaway listener and closes it. Master, filer, volume and S3 bind a moment later, but the admin waits for all of them first and only then binds its worker gRPC port, roughly two seconds in. That port defaults to the admin http port + 10000, which lands inside the Linux ephemeral range, so one of the cluster's own outgoing gRPC dials can take it during the gap and the admin dies on bind, taking the worker with it. Keep the listener from the availability check and hand it to the admin. * mini: clear the admin gRPC reservation before retaking it A rerun inside one process would otherwise inherit the closed listener of the previous run whenever the reservation fails, and the admin would accept it and only find out inside Serve. * mini: snapshot the admin options for the startup goroutine The cleanup path read the package-level options long after the goroutine started, so a later in-process run could have its reserved listener closed by the previous run.