服务器运行几个月了,最近突然panic在rpc的gob encode函数中,应用层逻辑很简单,所以暂时不太清楚是哪里的问题,正在学习go的rpc源码和gob编码的源码。panic信息如下:
```
panic: reflect: call of reflect.Value.Int on ptr Value [recovered]
panic: reflect: call of reflect.Value.Int on ptr Value
goroutine 52598456 [running]:
encoding/gob.catchError(0xc4209e10d0)
/root/go/src/encoding/gob/error.go:38 +0x95
panic(0xc40860, 0xc42606ad00)
/root/go/src/runtime/panic.go:489 +0x2cf
reflect.Value.Int(0xbcdec0, 0xc4251fe520, 0x196, 0x196)
/root/go/src/reflect/value.go:902 +0xb5
encoding/gob.encInt(0xc423ab4ae0, 0xc422da1e40, 0xbcdec0, 0xc4251fe520, 0x196)
/root/go/src/encoding/gob/encode.go:188 +0x43
encoding/gob.(*Encoder).encodeStruct(0xc4209e1040, 0xc4209e1078, 0xc421a28a20, 0xcc1be0, 0xc4251fe510, 0x199)
/root/go/src/encoding/gob/encode.go:334 +0x256
encoding/gob.(*Encoder).encode(0xc4209e1040, 0xc4209e1078, 0xcc1be0, 0xc4251fe510, 0x199, 0xc4209c3480)
/root/go/src/encoding/gob/encode.go:707 +0x1d3
encoding/gob.(*Encoder).EncodeValue(0xc4209e1040, 0xc95bc0, 0xc4251fe510, 0x16, 0x0, 0x0)
/root/go/src/encoding/gob/encoder.go:250 +0x3ab
encoding/gob.(*Encoder).Encode(0xc4209e1040, 0xc95bc0, 0xc4251fe510, 0x0, 0x0)
/root/go/src/encoding/gob/encoder.go:175 +0x61
net/rpc.(*gobServerCodec).WriteResponse(0xc422b51ec0, 0xc422d737d0, 0xc95bc0, 0xc4251fe510, 0xc422b43a40, 0xc422b4a350)
/root/go/src/net/rpc/server.go:424 +0x1dd
net/rpc.(*Server).sendResponse(0xc420055680, 0xc422b45aa0, 0xc421c4ff00, 0xc95bc0, 0xc4251fe510, 0x1334ac0, 0xc422b51ec0, 0x0, 0x0)
/root/go/src/net/rpc/server.go:366 +0x130
net/rpc.(*service).call(0xc422afe900, 0xc420055680, 0xc422b45aa0, 0xc422b4ec00, 0xc421c4ff00, 0xbc3800, 0xc427ab07e0, 0x16, 0xc95bc0, 0xc4251fe510, ...)
/root/go/src/net/rpc/server.go:394 +0x22e
created by net/rpc.(*Server).ServeCodec
/root/go/src/net/rpc/server.go:481 +0x404
```
源码大致如下:
```go
type RpcArgs struct{
A string
B int32
C string
D int32
E String
F int32
G int32
H int32
I bool
J string
K int32
L String
M int32
N int32
O int32
P bool
}
func RPC1(args *RpcArgs, reply *int){
//some simple logic
....
//do another async rpc call,and then painc in gob encode
rpc.Client.Go(serviceMethod, args, reply, make(chan *rpc.Call, 1))
}
```
在encodeStruct里,紧接着调用的是encInt函数,但是最终panic时发现要解析的数据类型是Ptr.不知道有人遇到过这样的问题没,谢谢!
哦,谢谢提醒。第一次提交时点快了,没调整好格式,我随后就修改了,我这现在看没问题了。
堆栈信息从第一行到最后一行都是go的源码里的函数调用,而且我想不是reflect的使用问题导致,否则要错的话早就出错了
#2
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polaris
社区,需要你我一同完善!
根据错误信息,貌似需要使用 `reflect.Value.Elem().Int()`。
注:这个年代,markdown 语法一点都不了解吗?再说了发布页面右侧有 markdown 语法的简单说明啊!
#1