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fatal error: concurrent map read and map write #278

dekz opened this issue Jul 18, 2019 · 0 comments · Fixed by #279


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@dekz dekz commented Jul 18, 2019

After running mesh for an extended period I encountered the following crash:

{"direction":1,"level":"debug","msg":"found peer who speaks our protocol","peerID":"QmVGX47BzePPqEzpkTwfUJogPZxHcifpSXsGdgyHjtk5t7","protocol":"/meshsub/1.0.0","time":"2019-07-17T10:25:10Z"}
{"count":6,"level":"debug","msg":"received AddOrders request via RPC","time":"2019-07-17T10:25:10Z"}
{"count":6,"level":"debug","msg":"received AddOrders request via RPC","time":"2019-07-17T10:25:13Z"}
{"count":6,"level":"debug","msg":"received AddOrders request via RPC","time":"2019-07-17T10:25:16Z"}
{"count":6,"level":"debug","msg":"received AddOrders request via RPC","time":"2019-07-17T10:25:19Z"}
fatal error: concurrent map read and map write

goroutine 64 [running]:
runtime.throw(0xeb74c4, 0x21)
    /usr/local/go/src/runtime/panic.go:617 +0x72 fp=0xc0013e50d8 sp=0xc0013e50a8 pc=0x433a42
runtime.mapaccess2(0xd563e0, 0xc0001b43c0, 0xc0013e5228, 0x199dfe0, 0xc001fdc600)
    /usr/local/go/src/runtime/map.go:472 +0x284 fp=0xc0013e5120 sp=0xc0013e50d8 pc=0x413f34*Decoder).FindEventType(0xc0000f6000, 0xc10d63adca56bc67, 0xe9c8ad40a5149b71, 0xc3258396, 0xc000c6ba80, 0x3, 0x4, 0xc001fddb20, 0x20, 0x20, ...)
    /go/src/ +0x570 fp=0xc0013e5220 sp=0xc0013e5120 pc=0xc15340*Watcher).setupEventWatcher.func1(0xc000358820, 0xc000421320)
    /go/src/ +0x133 fp=0xc0013e5fd0 sp=0xc0013e5220 pc=0xc1dbe3
    /usr/local/go/src/runtime/asm_amd64.s:1337 +0x1 fp=0xc0013e5fd8 sp=0xc0013e5fd0 pc=0x460681
created by*Watcher).setupEventWatcher
    /go/src/ +0xa2

goroutine 1 [select (no cases), 1945 minutes]:
    /go/src/ +0x1ec

goroutine 20 [chan receive, 1945 minutes]:*nonrecursiveTree).dispatch(0xc0000aa840, 0xc0000aa780)
    /go/src/ +0xb6
created by
    /go/src/ +0xdd

This was on a pre-beta release. Now updated to latest to see if this re-occurs.

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