浅析goland等待锁问题

(编辑：jimmy 日期: 2024/12/23 浏览：2)

问题描述：

向后台发送了一个URL请求，竟然一直卡住，没有返回，就一直卡着

问题分析定位：

一开始还以为是网络，还是什么其它奇怪的原因，毕竟之前好好的。

这里应该第一时间思考环境的变化，网络、程序版本、还是什么地方变化了。

后来又试了好几次，发现还是一样，想到了将Pod的数目改成了2个，于是估计是等待锁或者死锁之类的。

通过以下链接获取调试信息：
curl “127.0.0.1:43411/debug/pprof/goroutine"color: #ff0000">总结

遇到此类问题首先不能慌，之后不能逃避问题。

需要将问题尽可能地记录，以便于还原，同时还要基于现在的情况进行调试，千万不能想着重启会好，不能逃避问题。

后面解决问题的步骤还可以，不过这个问题本身也不是很难。

------------记录

1 @ 0x47fc42 0x80fb0d 0x811270 0x80b86e 0x7ba758 0x7e0686 0x7f24fa 0x81d712 0x6ff9b4 0x7018b6 0x702c88 0x6fe971 0x469581
#0x47fc41 sync.(*RWMutex).Unlock+0xb1     /usr/local/go/src/sync/rwmutex.go:113
#0x80fb0c [go文件路径]m.(*Pod).SetDataNodeCarry+0x6c  /go/src/[go文件路径]m/t.go:777
#0x81126f [go文件路径]m.pts.ptsn+0x5f /go/src/[go文件路径]m/t.go:1059
#0x80b86d [go文件路径]m.(*t).ctcpd+0x83d /go/src/[go文件路径]m/t.go:453
#0x7ba757 [go文件路径]m.(*c).cDP+0x1e7  /go/src/[go文件路径]m/c.go:558
#0x7e0685 [go文件路径]m.(*m).cDP+0x375  /go/src/[go文件路径]m/handle_admin.go:353
#0x7f24f9 [go文件路径]m.(*m).ServeHTTP+0x1659   /go/src/[go文件路径]m/http_server.go:188
#0x81d711 [go文件路径]m.(*m).handlerWithInterceptor.func1+0x81  /go/src/[go文件路径]m/http_server.go:160
#0x6ff9b3 net/http.HandlerFunc.ServeHTTP+0x43    /usr/local/go/src/net/http/server.go:1995
#0x7018b5 net/http.(*ServeMux).ServeHTTP+0x1d5    /usr/local/go/src/net/http/server.go:2375
#0x702c87 net/http.serverHandler.ServeHTTP+0xa7    /usr/local/go/src/net/http/server.go:2774
#0x6fe970 net/http.(*conn).serve+0x850     /usr/local/go/src/net/http/server.go:1878


2 @ 0x43c20f 0x44c609 0x44c5df 0x44c37d 0x47ecb9 0x7ba6ad 0x7e0686 0x7f24fa 0x81d712 0x6ff9b4 0x7018b6 0x702c88 0x6fe971 0x469581
#0x44c37c sync.runtime_SemacquireMutex+0x3c   /usr/local/go/src/runtime/sema.go:71
#0x47ecb8 sync.(*Mutex).Lock+0x108    /usr/local/go/src/sync/mutex.go:134
#0x7ba6ac [go文件路径]m.(*c).cDP+0x13c /go/src/[go文件路径]m/c.go:554
#0x7e0685 [go文件路径]m.(*m).cDP+0x375 /go/src/[go文件路径]m/handle_admin.go:353
#0x7f24f9 [go文件路径]m.(*m).ServeHTTP+0x1659  /go/src/[go文件路径]m/http_server.go:188
#0x81d711 [go文件路径]m.(*m).handlerWithInterceptor.func1+0x81 /go/src/[go文件路径]m/http_server.go:160
#0x6ff9b3 net/http.HandlerFunc.ServeHTTP+0x43   /usr/local/go/src/net/http/server.go:1995
#0x7018b5 net/http.(*ServeMux).ServeHTTP+0x1d5   /usr/local/go/src/net/http/server.go:2375
#0x702c87 net/http.serverHandler.ServeHTTP+0xa7   /usr/local/go/src/net/http/server.go:2774
#0x6fe970 net/http.(*conn).serve+0x850    /usr/local/go/src/net/http/server.go:1878
goroutine 13994 [runnable]:
sync.(*Mutex).Lock(0xc002300468)
	/usr/local/go/src/sync/mutex.go:72 +0x2c9
sync.(*RWMutex).Lock(0xc002300468)
	/usr/local/go/src/sync/rwmutex.go:93 +0x2d
[go文件路径]m.(*Pod).SetDataNodeCarry(0xc0023003f0, 0x4024000000000000)
	/go/src/[go文件路径]m/t.go:774 +0x36
[go文件路径]m.pts.ptsn(0xc003b17810, 0x2, 0x2, 0x0, 0x3)
	/go/src/[go文件路径]m/t.go:1059 +0x60
[go文件路径]m.(*t).ctcpd(0xc0000ef090, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3, 0x6, 0xc002275958, ...)
	/go/src/[go文件路径]m/t.go:453 +0x83e
[go文件路径]m.(*c).cDP(0xc00223c000, 0xc00286e673, 0xe, 0xc00286e65f, 0x6, 0x0, 0x0, 0x0)
	/go/src/[go文件路径]m/c.go:558 +0x1e8
[go文件路径]m.(*m).cDP(0xc0009aca90, 0xabfd80, 0xc0031a1260, 0xc00296be00)
	/go/src/[go文件路径]m/handle_admin.go:353 +0x376
[go文件路径]m.(*m).ServeHTTP(0xc0009aca90, 0xabfd80, 0xc0031a1260, 0xc00296be00)
	/go/src/[go文件路径]m/http_server.go:188 +0x165a
[go文件路径]m.(*m).handlerWithInterceptor.func1(0xabfd80, 0xc0031a1260, 0xc00296be00)
	/go/src/[go文件路径]m/http_server.go:160 +0x82
net/http.HandlerFunc.ServeHTTP(0xc000990300, 0xabfd80, 0xc0031a1260, 0xc00296be00)
	/usr/local/go/src/net/http/server.go:1995 +0x44
net/http.(*ServeMux).ServeHTTP(0x10a3520, 0xabfd80, 0xc0031a1260, 0xc00296be00)
	/usr/local/go/src/net/http/server.go:2375 +0x1d6
net/http.serverHandler.ServeHTTP(0xc0000dad00, 0xabfd80, 0xc0031a1260, 0xc00296be00)
	/usr/local/go/src/net/http/server.go:2774 +0xa8
net/http.(*conn).serve(0xc003b19860, 0xac1d80, 0xc0009a9e40)
	/usr/local/go/src/net/http/server.go:1878 +0x851
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2884 +0x2f4


goroutine 17002 [semacquire, 5 minutes]:
sync.runtime_SemacquireMutex(0xc0026fc460, 0x419400)
	/usr/local/go/src/runtime/sema.go:71 +0x3d
sync.(*Mutex).Lock(0xc0026fc45c)
	/usr/local/go/src/sync/mutex.go:134 +0x109
[go文件路径]m.(*c).cDP(0xc00223c000, 0xc00002a083, 0xe, 0xc00002a06f, 0x6, 0x0, 0x0, 0x0)
	/go/src/[go文件路径]m/c.go:554 +0x13d
[go文件路径]m.(*m).cDP(0xc0009aca90, 0xabfd80, 0xc0031a0620, 0xc002988900)
	/go/src/[go文件路径]m/handle_admin.go:353 +0x376
[go文件路径]m.(*m).ServeHTTP(0xc0009aca90, 0xabfd80, 0xc0031a0620, 0xc002988900)
	/go/src/[go文件路径]m/http_server.go:188 +0x165a
[go文件路径]m.(*m).handlerWithInterceptor.func1(0xabfd80, 0xc0031a0620, 0xc002988900)
	/go/src/[go文件路径]m/http_server.go:160 +0x82
net/http.HandlerFunc.ServeHTTP(0xc000990300, 0xabfd80, 0xc0031a0620, 0xc002988900)
	/usr/local/go/src/net/http/server.go:1995 +0x44
net/http.(*ServeMux).ServeHTTP(0x10a3520, 0xabfd80, 0xc0031a0620, 0xc002988900)
	/usr/local/go/src/net/http/server.go:2375 +0x1d6
net/http.serverHandler.ServeHTTP(0xc0000dad00, 0xabfd80, 0xc0031a0620, 0xc002988900)
	/usr/local/go/src/net/http/server.go:2774 +0xa8
net/http.(*conn).serve(0xc003b18640, 0xac1d80, 0xc00298e940)
	/usr/local/go/src/net/http/server.go:1878 +0x851
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2884 +0x2f4



goroutine 14532 [semacquire, 11 minutes]:
sync.runtime_SemacquireMutex(0xc0026fc460, 0x419400)
	/usr/local/go/src/runtime/sema.go:71 +0x3d
sync.(*Mutex).Lock(0xc0026fc45c)
	/usr/local/go/src/sync/mutex.go:134 +0x109
[go文件路径]m.(*c).cDP(0xc00223c000, 0xc003f74303, 0xe, 0xc003f742ef, 0x6, 0x0, 0x0, 0x0)
	/go/src/[go文件路径]m/c.go:554 +0x13d
[go文件路径]m.(*m).cDP(0xc0009aca90, 0xabfd80, 0xc00454a620, 0xc004544800)
	/go/src/[go文件路径]m/handle_admin.go:353 +0x376
[go文件路径]m.(*m).ServeHTTP(0xc0009aca90, 0xabfd80, 0xc00454a620, 0xc004544800)
	/go/src/[go文件路径]m/http_server.go:188 +0x165a
[go文件路径]m.(*m).handlerWithInterceptor.func1(0xabfd80, 0xc00454a620, 0xc004544800)
	/go/src/[go文件路径]m/http_server.go:160 +0x82
net/http.HandlerFunc.ServeHTTP(0xc000990300, 0xabfd80, 0xc00454a620, 0xc004544800)
	/usr/local/go/src/net/http/server.go:1995 +0x44
net/http.(*ServeMux).ServeHTTP(0x10a3520, 0xabfd80, 0xc00454a620, 0xc004544800)
	/usr/local/go/src/net/http/server.go:2375 +0x1d6
net/http.serverHandler.ServeHTTP(0xc0000dad00, 0xabfd80, 0xc00454a620, 0xc004544800)
	/usr/local/go/src/net/http/server.go:2774 +0xa8
net/http.(*conn).serve(0xc002e17540, 0xac1d80, 0xc002a74780)
	/usr/local/go/src/net/http/server.go:1878 +0x851
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2884 +0x2f4

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