I've got a service that I have been testing quite a lot over the last few
days. Only after I handed it off for some testing to a colleague, was he
able to produce a SIGBUS panic that I had not seen before:
go 1.11.2 linux/amd64
The service does set up its own SIGINT/SIGTERM handling via the typical
siginal.Notify approach. The nature of the program is that it listens on
nats.io message queues, and receives requests to run tasks as
sub-processes. My tests have been running between 40-200 of these instances
over the course of a few days. But this panic occurred on a completely
different machine that those I had been testing...
goroutine 1121 [runnable (scan)]:
fatal error: unexpected signal during runtime execution
panic during panic
[signal SIGBUS: bus error code=0x2 addr=0xfa2adc pc=0x451637]
runtime stack:
runtime.throw(0xcf7fe3, 0x2a)
/vol/apps/go/1.11.2/src/runtime/panic.go:608 +0x72
runtime.sigpanic()
/vol/apps/go/1.11.2/src/runtime/signal_unix.go:374 +0x2f2
runtime.gentraceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0,
0xc0004baa80, 0x0, 0x0, 0x64, 0x0, 0x0, 0x0, ...)
/vol/apps/go/1.11.2/src/runtime/traceback.go:190 +0x377
runtime.traceback1(0xffffffffffffffff, 0xffffffffffffffff, 0x0,
0xc0004baa80, 0x0)
/vol/apps/go/1.11.2/src/runtime/traceback.go:728 +0xf3
runtime.traceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xc0004baa80)
/vol/apps/go/1.11.2/src/runtime/traceback.go:682 +0x52
runtime.tracebackothers(0xc00012e780)
/vol/apps/go/1.11.2/src/runtime/traceback.go:947 +0x187
runtime.dopanic_m(0xc00012e780, 0x42dcc2, 0x7f83f6ffc808, 0x1)
/vol/apps/go/1.11.2/src/runtime/panic.go:805 +0x2aa
runtime.fatalthrow.func1()
/vol/apps/go/1.11.2/src/runtime/panic.go:663 +0x5f
runtime.fatalthrow()
/vol/apps/go/1.11.2/src/runtime/panic.go:660 +0x57
runtime.throw(0xcf7fe3, 0x2a)
/vol/apps/go/1.11.2/src/runtime/panic.go:608 +0x72
runtime.sigpanic()
/vol/apps/go/1.11.2/src/runtime/signal_unix.go:374 +0x2f2
runtime.gentraceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0,
0xc0004baa80, 0x0, 0x0, 0x7fffffff, 0x7f83f6ffcd00, 0x0, 0x0, ...)
/vol/apps/go/1.11.2/src/runtime/traceback.go:190 +0x377
runtime.scanstack(0xc0004baa80, 0xc000031270)
/vol/apps/go/1.11.2/src/runtime/mgcmark.go:786 +0x15a
runtime.scang(0xc0004baa80, 0xc000031270)
/vol/apps/go/1.11.2/src/runtime/proc.go:947 +0x218
runtime.markroot.func1()
/vol/apps/go/1.11.2/src/runtime/mgcmark.go:264 +0x6d
runtime.markroot(0xc000031270, 0xc000000047)
/vol/apps/go/1.11.2/src/runtime/mgcmark.go:245 +0x309
runtime.gcDrain(0xc000031270, 0x6)
/vol/apps/go/1.11.2/src/runtime/mgcmark.go:882 +0x117
runtime.gcBgMarkWorker.func2()
/vol/apps/go/1.11.2/src/runtime/mgc.go:1858 +0x13f
runtime.systemstack(0x7f83f7ffeb90)
/vol/apps/go/1.11.2/src/runtime/asm_amd64.s:351 +0x66
runtime.mstart()
/vol/apps/go/1.11.2/src/runtime/proc.go:1229
Much appreciated for any insight.
Justin
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