Klaus Post 55f5c18fd9 Harden internode DeadlineConn (#20631) ... Since DeadlineConn would send deadline updates directly upstream, it would race with Read/Write operations. The stdlib will perform a read, but do an async SetReadDeadLine(unix(1)) to cancel the Read in `abortPendingRead`. In this case, the Read may override the deadline intended to cancel the read. Stop updating deadlines if a deadline in the past is seen and when Close is called. A mutex now protects all upstream deadline calls to avoid races. This should fix the short-term buildup of... ``` 365 @ 0x44112e 0x4756b9 0x475699 0x483525 0x732286 0x737407 0x73816b 0x479601 # 0x475698 sync.runtime_notifyListWait+0x138 runtime/sema.go:569 # 0x483524 sync.(*Cond).Wait+0x84 sync/cond.go:70 # 0x732285 net/http.(*connReader).abortPendingRead+0xa5 net/http/server.go:729 # 0x737406 net/http.(*response).finishRequest+0x86 net/http/server.go:1676 # 0x73816a net/http.(*conn).serve+0x62a net/http/server.go:2050 ``` AFAICT Only affects internode calls that create a connection (non-grid).		2024-11-11 09:15:17 -08:00
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deadlineconn_test.go	Harden internode DeadlineConn (#20631)	2024-11-11 09:15:17 -08:00
deadlineconn.go	Harden internode DeadlineConn (#20631)	2024-11-11 09:15:17 -08:00