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n0ctal
f63ed9f510
A panic in a goroutine without a recover takes the whole panel down. The per-node heartbeat and traffic-sync goroutines run remote network I/O for each node with no panic isolation, so one misbehaving node could crash the master. Add common.GoRecover(name, fn), which runs fn in a goroutine guarded by a recover that logs the panic with a stack trace instead of crashing, and use it for the per-node heartbeat, traffic-sync and global-push goroutines. The deferred WaitGroup/semaphore releases still run during panic unwind, so the group never stalls. Other background goroutines can adopt the same helper.