Dead lock, how to fix?

[hailwind]

goroutine stack behind, how to fix this problem?

1 @ 0x43a576 0x44aff3 0x44afcd 0x4661e5 0x481732 0x74fa67 0x7763d7 0x774a46 0x78c84d 0x78cd87 0x78cf78 0x46a141
#	0x4661e4	sync.runtime_Semacquire+0x24				/opt/go/src/runtime/sema.go:56
#	0x481731	sync.(*WaitGroup).Wait+0x51				/opt/go/src/sync/waitgroup.go:136
#	0x74fa66	golang.org/x/sync/errgroup.(*Group).Wait+0x26		/home/alexw/go/pkg/mod/golang.org/x/sync@v0.0.0-20220601150217-0de741cfad7f/errgroup/errgroup.go:53
#	0x7763d6	github.com/go-zeromq/zmq4.(*routerMWriter).write+0x2d6	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/router.go:242
#	0x774a45	github.com/go-zeromq/zmq4.(*routerSocket).Send+0xe5	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/router.go:40
#	0x78c84c	sdwan/ctrl/device.(*ZeroMQ).sendMsg+0x28c		/home/alexw/workspace/hw-agent/ctrl/device/zmq.go:60
#	0x78cd86	sdwan/ctrl/device.(*ZeroMQ).runSend+0x126		/home/alexw/workspace/hw-agent/ctrl/device/zmq.go:102
#	0x78cf77	sdwan/ctrl/device.RunZmq+0xf7				/home/alexw/workspace/hw-agent/ctrl/device/zmq.go:124

1 @ 0x43a576 0x44aff3 0x44afcd 0x466305 0x47fca5 0x47fadb 0x778a99 0x771a02 0x7719ee 0x771b39 0x77117c 0x76fb2d 0x7764ba 0x74fc04 0x46a141
#	0x466304	sync.runtime_SemacquireMutex+0x24				/opt/go/src/runtime/sema.go:71
#	0x47fca4	sync.(*Mutex).lockSlow+0x164					/opt/go/src/sync/mutex.go:162
#	0x47fada	sync.(*Mutex).Lock+0x3a						/opt/go/src/sync/mutex.go:81
#	0x778a98	github.com/go-zeromq/zmq4.(*socket).scheduleRmConn+0x38		/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/socket.go:334
#	0x771a01	github.com/go-zeromq/zmq4.(*Conn).notifyOnCloseError+0x41	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:500
#	0x7719ed	github.com/go-zeromq/zmq4.(*Conn).SetClosed+0x2d		/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:472
#	0x771b38	github.com/go-zeromq/zmq4.(*Conn).checkIO+0xf8			/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:492
#	0x77117b	github.com/go-zeromq/zmq4.(*Conn).send+0x17b			/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:357
#	0x76fb2c	github.com/go-zeromq/zmq4.(*Conn).SendMsg+0x16c			/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:190
#	0x7764b9	github.com/go-zeromq/zmq4.(*routerMWriter).write.func1+0x39	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/router.go:239
#	0x74fc03	golang.org/x/sync/errgroup.(*Group).Go.func1+0x63		/home/alexw/go/pkg/mod/golang.org/x/sync@v0.0.0-20220601150217-0de741cfad7f/errgroup/errgroup.go:75

1 @ 0x43a576 0x44aff3 0x44afcd 0x466305 0x47fca5 0x47fadb 0x778a99 0x771a02 0x7719ee 0x771b39 0x77188f 0x7758c8 0x46a141
#	0x466304	sync.runtime_SemacquireMutex+0x24				/opt/go/src/runtime/sema.go:71
#	0x47fca4	sync.(*Mutex).lockSlow+0x164					/opt/go/src/sync/mutex.go:162
#	0x47fada	sync.(*Mutex).Lock+0x3a						/opt/go/src/sync/mutex.go:81
#	0x778a98	github.com/go-zeromq/zmq4.(*socket).scheduleRmConn+0x38		/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/socket.go:334
#	0x771a01	github.com/go-zeromq/zmq4.(*Conn).notifyOnCloseError+0x41	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:500
#	0x7719ed	github.com/go-zeromq/zmq4.(*Conn).SetClosed+0x2d		/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:472
#	0x771b38	github.com/go-zeromq/zmq4.(*Conn).checkIO+0xf8			/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:492
#	0x77188e	github.com/go-zeromq/zmq4.(*Conn).read+0x68e			/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/conn.go:385
#	0x7758c7	github.com/go-zeromq/zmq4.(*routerQReader).listen+0x1a7		/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/router.go:161

1 @ 0x43a576 0x44aff3 0x44afcd 0x466305 0x47fca5 0x481296 0x481275 0x7782c5 0x777c5c 0x46a141
#	0x466304	sync.runtime_SemacquireMutex+0x24			/opt/go/src/runtime/sema.go:71
#	0x47fca4	sync.(*Mutex).lockSlow+0x164				/opt/go/src/sync/mutex.go:162
#	0x481295	sync.(*Mutex).Lock+0x35					/opt/go/src/sync/mutex.go:81
#	0x481274	sync.(*RWMutex).Lock+0x14				/opt/go/src/sync/rwmutex.go:139
#	0x7782c4	github.com/go-zeromq/zmq4.(*socket).addConn+0x64	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/socket.go:285
#	0x777c5b	github.com/go-zeromq/zmq4.(*socket).accept+0x1fb	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/socket.go:227

1 @ 0x43a576 0x44aff3 0x44afcd 0x466305 0x47fca5 0x775ea5 0x775e75 0x77897c 0x778f1d 0x46a141
#	0x466304	sync.runtime_SemacquireMutex+0x24			/opt/go/src/runtime/sema.go:71
#	0x47fca4	sync.(*Mutex).lockSlow+0x164				/opt/go/src/sync/mutex.go:162
#	0x775ea4	sync.(*Mutex).Lock+0x64					/opt/go/src/sync/mutex.go:81
#	0x775e74	github.com/go-zeromq/zmq4.(*routerMWriter).rmConn+0x34	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/router.go:211
#	0x77897b	github.com/go-zeromq/zmq4.(*socket).rmConn+0x23b	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/socket.go:329
#	0x778f1c	github.com/go-zeromq/zmq4.(*socket).connReaper+0x17c	/home/alexw/go/pkg/mod/github.com/go-zeromq/zmq4@v0.15.0/socket.go:393

[tgbv]

some code sample would be useful in diagnosing it

[egorse]

Fixed by #149 ?