getty 偶现panic，程序退出

[gaohuag]

What happened:
使用dubbo-go的程序会异常退出

What you expected to happen:
如果发生异常，能通过recover捕获异常。
How to reproduce it (as minimally and precisely as possible):
偶现的，我也不知道怎么重现问题
Anything else we need to know?:
一些错误提示：
``
2021-08-03T07:25:46.724+0100 DEBUG getty/pool.go:195 add session{session {client:TCP_CLIENT:24:10.0.2.15:34697<->172.31.229.155:20889}, Read Bytes: 0, Write Bytes: 0, Read Pkgs: 0, Write Pkgs: 0}
2021-08-03T07:25:46.724+0100 ERROR getty/pool.go:157 tcpConn.SetKeepAlivePeriod() = error:%vset tcp 10.0.2.15:43983->172.31.40.48:28089: setsockopt: invalid argument
github.com/apache/dubbo-go/remoting/getty.(*gettyRPCClient).newSession
/golang/monitor-agent/vendor/github.com/apache/dubbo-go/remoting/getty/pool.go:157
github.com/apache/dubbo-getty.(*client).connect
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/client.go:391
github.com/apache/dubbo-getty.(*client).reConnect
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/client.go:443
github.com/apache/dubbo-getty.(*client).RunEventLoop
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/client.go:421
panic: @rtimeout < 1

goroutine 6331 [running]:
github.com/apache/dubbo-getty.(*gettyConn).SetReadTimeout(0xc000b5e410, 0x0)
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/connection.go:118 +0x65
github.com/apache/dubbo-go/remoting/getty.(*gettyRPCClient).newSession(0xc00017e000, 0x12436d0, 0xc0004569c0, 0x12436d0, 0xc0004569c0)
/golang/monitor-agent/vendor/github.com/apache/dubbo-go/remoting/getty/pool.go:171 +0x892
github.com/apache/dubbo-getty.(*client).connect(0xc000a61040)
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/client.go:391 +0xa4
github.com/apache/dubbo-getty.(*client).reConnect(0xc000a61040)
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/client.go:443 +0x56
github.com/apache/dubbo-getty.(*client).RunEventLoop(0xc000a61040, 0xc000254410)
/golang/monitor-agent/vendor/github.com/apache/dubbo-getty/client.go:421 +0x6d
created by github.com/apache/dubbo-go/remoting/getty.newGettyRPCClientConn
/golang/monitor-agent/vendor/github.com/apache/dubbo-go/remoting/getty/pool.go:82 +0x22b
``
dubbo-go v1.5.6和v3.0.0都有这个问题

[LaurenceLiZhixin]

@Mulavar

[Lvnszn]

你好，可以了解一下您这边的配置会替换掉consumerConfig里面的protocalConf这个字段么？ @gaohuag

[LaurenceLiZhixin]

@gaohuag Any feedback？

[Mulavar]

能否具体描述一下产生这个问题时的场景，比如当时你在做什么操作，是起了大量client或者是写了复杂的调用逻辑么？

[Mulavar]

看日志，应该是设置 getty 参数时 tcp_read_timeout 设置的值过小，这个参数必须大于等于 1s，否则就会 panic。