get error when run a period of time: goroutine 115 [select, 3 minutes], goroutine 116 [IO wait] etc.

[huahuayu]

my code:

	pool := tunny.NewFunc(runtime.NumCPU(), func(i interface{}) interface{} {
		updateDB(i.(string))
		return nil
	})
	for scanner.Scan() {
		line := scanner.Text()
		go pool.Process(line)
	}
}

func updateDB(line string) {
        // updateDB logic
}

get error when run a period of time:

goroutine 115 [select, 3 minutes]:
github.com/ethereum/go-ethereum/rpc.(*Client).dispatch(0xc0005a0180, 0xe1d4b8, 0xc000506270)
        /home/amber/go/pkg/mod/github.com/ethereum/go-ethereum@v1.10.4/rpc/client.go:561 +0x27d
created by github.com/ethereum/go-ethereum/rpc.initClient
        /home/amber/go/pkg/mod/github.com/ethereum/go-ethereum@v1.10.4/rpc/client.go:223 +0x2c5

goroutine 116 [IO wait]:
internal/poll.runtime_pollWait(0x7fbf244dc6b0, 0x72, 0xffffffffffffffff)
        /usr/local/go/src/runtime/netpoll.go:222 +0x55
internal/poll.(*pollDesc).wait(0xc0005a0118, 0x72, 0x400, 0x400, 0xffffffffffffffff)
        /usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x45
internal/poll.(*pollDesc).waitRead(...)
        /usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc0005a0100, 0xc000346000, 0x400, 0x400, 0x0, 0x0, 0x0)
        /usr/local/go/src/internal/poll/fd_unix.go:166 +0x1d5
net.(*netFD).Read(0xc0005a0100, 0xc000346000, 0x400, 0x400, 0x8b, 0x100010000, 0xc000264230)
        /usr/local/go/src/net/fd_posix.go:55 +0x4f
net.(*conn).Read(0xc000266010, 0xc000346000, 0x400, 0x400, 0x0, 0x0, 0x0)
        /usr/local/go/src/net/net.go:183 +0x91
bufio.(*Reader).fill(0xc0001c0b40)
        /usr/local/go/src/bufio/bufio.go:101 +0x108
bufio.(*Reader).Peek(0xc0001c0b40, 0x2, 0x0, 0x0, 0x20, 0x0, 0x0)
        /usr/local/go/src/bufio/bufio.go:139 +0x4f
github.com/gorilla/websocket.(*Conn).read(0xc000194160, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0)
        /home/amber/go/pkg/mod/github.com/gorilla/websocket@v1.4.2/conn.go:370 +0x46
github.com/gorilla/websocket.(*Conn).advanceFrame(0xc000194160, 0x9, 0x0, 0x0)
        /home/amber/go/pkg/mod/github.com/gorilla/websocket@v1.4.2/conn.go:798 +0x5c
github.com/gorilla/websocket.(*Conn).NextReader(0xc000194160, 0xc000102480, 0x7fbef01c8da8, 0x8, 0x18, 0x7fbf4d7cc108)
        /home/amber/go/pkg/mod/github.com/gorilla/websocket@v1.4.2/conn.go:980 +0x8f
github.com/gorilla/websocket.(*Conn).ReadJSON(0xc000194160, 0xc0bb20, 0xc003f37728, 0x1, 0xc003f37728)
        /home/amber/go/pkg/mod/github.com/gorilla/websocket@v1.4.2/json.go:50 +0x2f
github.com/ethereum/go-ethereum/rpc.(*jsonCodec).readBatch(0xc0000c80a0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
        /home/amber/go/pkg/mod/github.com/ethereum/go-ethereum@v1.10.4/rpc/json.go:209 +0x57
github.com/ethereum/go-ethereum/rpc.(*Client).read(0xc0005a0180, 0xe1d4b8, 0xc000506270)
        /home/amber/go/pkg/mod/github.com/ethereum/go-ethereum@v1.10.4/rpc/client.go:634 +0xca
created by github.com/ethereum/go-ethereum/rpc.(*Client).dispatch
        /home/amber/go/pkg/mod/github.com/ethereum/go-ethereum@v1.10.4/rpc/client.go:558 +0x10f

goroutine 163 [select, 3 minutes]:
github.com/Jeffail/tunny.(*workerWrapper).run(0xc0000d5d40)
        /home/amber/go/pkg/mod/github.com/!jeffail/tunny@v0.1.4/worker.go:93 +0x1d4
created by github.com/Jeffail/tunny.newWorkerWrapper
        /home/amber/go/pkg/mod/github.com/!jeffail/tunny@v0.1.4/worker.go:70 +0x130

goroutine 146519 [select, 3 minutes]:
github.com/go-sql-driver/mysql.(*mysqlConn).startWatcher.func1(0xc012709e60, 0xc00036a5a0, 0xc0001d2300)
        /home/amber/go/pkg/mod/github.com/go-sql-driver/mysql@v1.5.0/connection.go:621 +0xa5
created by github.com/go-sql-driver/mysql.(*mysqlConn).startWatcher
        /home/amber/go/pkg/mod/github.com/go-sql-driver/mysql@v1.5.0/connection.go:618 +0xbe

[mihaitodor]

@huahuayu I looked into this a bit and it's not clear what the issue is. Are you getting a panic or some deadlock?

If possible, it would help a lot to get a self-contained code sample that I can run to debug the crash.