go routine leak

[miekg]

See: https://snapshot.raintank.io/dashboard/snapshot/OQ0upeF7EFPoRW2Dfgl9XHzD0c7OSZXY

This is my local proxy.

config:

. {
	proxy . 8.8.8.8:53 {
		protocol https_google
	}
        cache
	prometheus
	log
	errors
}

Only diff. with my auth server is cache and proxy so either one is suspect.

[miekg]

May be related to #1235

[miekg]

Think it is the healthchecking

[miekg]

dumping go-routines. This first one is increasing

goroutine profile: total 27
7 @ 0x3e6c8 0x3e790 0x14124 0x13ea8 0x224060 0x6fd2c
#	0x22405f	github.com/miekg/dns.zlexer+0x347	/home/miek/g/src/github.com/miekg/dns/scan.go:602

2 @ 0x3e6c8 0x39a5c 0x38edc 0xa420c 0xa4280 0xa4e78 0x135948 0x145e04 0x1e48a0 0x1e4d14 0x1e7cd0 0x302a58 0xf8530 0xf868c 0x30337c 0x6fd2c
#	0x38edb		internal/poll.runtime_pollWait+0x43	/home/miek/upstream/go/src/runtime/netpoll.go:173
#	0xa420b		internal/poll.(*pollDesc).wait+0x8b	/home/miek/upstream/go/src/internal/poll/fd_poll_runtime.go:85
#	0xa427f		internal/poll.(*pollDesc).waitRead+0x2b	/home/miek/upstream/go/src/internal/poll/fd_poll_runtime.go:90
#	0xa4e77		internal/poll.(*FD).Read+0x147		/home/miek/upstream/go/src/internal/poll/fd_unix.go:125
#	0x135947	net.(*netFD).Read+0x37			/home/miek/upstream/go/src/net/fd_unix.go:202
#	0x145e03	net.(*conn).Read+0x57			/home/miek/upstream/go/src/net/net.go:176
#	0x1e489f	crypto/tls.(*block).readFromUntil+0x77	/home/miek/upstream/go/src/crypto/tls/conn.go:488
#	0x1e4d13	crypto/tls.(*Conn).readRecord+0x9b	/home/miek/upstream/go/src/crypto/tls/conn.go:590
#	0x1e7ccf	crypto/tls.(*Conn).Read+0xcb		/home/miek/upstream/go/src/crypto/tls/conn.go:1134
#	0x302a57	net/http.(*persistConn).Read+0x173	/home/miek/upstream/go/src/net/http/transport.go:1391
#	0xf852f		bufio.(*Reader).fill+0x103		/home/miek/upstream/go/src/bufio/bufio.go:97
#	0xf868b		bufio.(*Reader).Peek+0x27		/home/miek/upstream/go/src/bufio/bufio.go:129
#	0x30337b	net/http.(*persistConn).readLoop+0x157	/home/miek/upstream/go/src/net/http/transport.go:1539

2 @ 0x3e6c8 0x4e558 0x304680 0x6fd2c
#	0x30467f	net/http.(*persistConn).writeLoop+0xeb	/home/miek/upstream/go/src/net/http/transport.go:1759

1 @ 0x1f708 0x53a98 0x17be38 0x6fd2c
#	0x53a97		os/signal.signal_recv+0x133	/home/miek/upstream/go/src/runtime/sigqueue.go:131
#	0x17be37	os/signal.loop+0x13		/home/miek/upstream/go/src/os/signal/signal_unix.go:22

[miekg]

Hmmm, it goes down as well.

[miekg]

Using more minimal Corefile:

 {
	proxy . 8.8.8.8:53 {
                except xxx xxxxx xxx x yy zzz # some internal names
		protocol https_google
	}
#        cache
	prometheus
#	log
#	errors
	pprof
}