GC1

Sun Jun 14 18:23:12 CEST 2015
stkbarPos=0 len(stkbar)=1 goid=1025 gcphase=2
fatal error: g already has stack barriers

runtime stack:
runtime.throw(0x7403d0, 0x1c)
        /data2/ds/local/go/src/runtime/panic.go:527 +0x96
runtime.scanstack(0xc209a40840)
        /data2/ds/local/go/src/runtime/mgcmark.go:334 +0x4f4
runtime.gcphasework(0xc209a40840)
        /data2/ds/local/go/src/runtime/mgcmark.go:273 +0x6d
runtime.stopg(0xc209a40840, 0x3)
        /data2/ds/local/go/src/runtime/proc1.go:395 +0x8e
runtime.markroot(0xc20801a060, 0x7f3800000346)
        /data2/ds/local/go/src/runtime/mgcmark.go:138 +0x1ef
runtime.parfordo(0xc20801a060)
        /data2/ds/local/go/src/runtime/parfor.go:95 +0x12a
runtime.gcscan_m()
        /data2/ds/local/go/src/runtime/mgcmark.go:37 +0xde
runtime.gc.func1()
        /data2/ds/local/go/src/runtime/mgc.go:876 +0x5c
runtime.systemstack(0xc208033500)
        /data2/ds/local/go/src/runtime/asm_amd64.s:262 +0x7c
runtime.mstart()
        /data2/ds/local/go/src/runtime/proc1.go:656

goroutine 162 [garbage collection scan]:
runtime.systemstack_switch()
        /data2/ds/local/go/src/runtime/asm_amd64.s:216 fp=0xc2087c9ce8 sp=0xc2087c9ce0
runtime.gc(0x0)
        /data2/ds/local/go/src/runtime/mgc.go:887 +0x1d9 fp=0xc2087c9f90 sp=0xc2087c9ce8
runtime.backgroundgc()
        /data2/ds/local/go/src/runtime/mgc.go:783 +0x3d fp=0xc2087c9fc0 sp=0xc2087c9f90
runtime.goexit()
        /data2/ds/local/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc2087c9fc8 sp=0xc2087c9fc0
created by runtime.startGC
        /data2/ds/local/go/src/runtime/mgc.go:756 +0x147

Stack1

Sun Jun 14 18:49:27 CEST 2015
stkbarPos=0 len(stkbar)=1 goid=985 gcphase=2
fatal error: g already has stack barriers

runtime stack:
runtime.throw(0x7403d0, 0x1c)
        /data2/ds/local/go/src/runtime/panic.go:527 +0x96
runtime.scanstack(0xc2085d58c0)
        /data2/ds/local/go/src/runtime/mgcmark.go:334 +0x4f4
runtime.gcphasework(0xc2085d58c0)
        /data2/ds/local/go/src/runtime/mgcmark.go:273 +0x6d
runtime.newstack()
        /data2/ds/local/go/src/runtime/stack1.go:759 +0xa01
runtime.morestack()
        /data2/ds/local/go/src/runtime/asm_amd64.s:330 +0x82

goroutine 985 [stack growth]:
runtime.makemap(0x6d2a40, 0x0, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/runtime/hashmap.go:187 fp=0xc20bb84b90 sp=0xc20bb84b88
net/http.(*conn).readRequest(0xc209c090e0, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/net/http/server.go:628 +0x393 fp=0xc20bb84c50 sp=0xc20bb84b90
net/http.(*conn).serve(0xc209c090e0)
        /data2/ds/local/go/src/net/http/server.go:1217 +0x727 fp=0xc20bb84fa8 sp=0xc20bb84c50
runtime.goexit()
        /data2/ds/local/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc20bb84fb0 sp=0xc20bb84fa8
created by net/http.(*Server).Serve
        /data2/ds/local/go/src/net/http/server.go:1807 +0x3f6

Stack2

Sun Jun 14 19:13:41 CEST 2015
stkbarPos=1 len(stkbar)=2 goid=417 gcphase=2
fatal error: g already has stack barriers

runtime stack:
runtime.throw(0x7403d0, 0x1c)
        /data2/ds/local/go/src/runtime/panic.go:527 +0x96
runtime.scanstack(0xc208420000)
        /data2/ds/local/go/src/runtime/mgcmark.go:334 +0x4f4
runtime.gcphasework(0xc208420000)
        /data2/ds/local/go/src/runtime/mgcmark.go:273 +0x6d
runtime.newstack()
        /data2/ds/local/go/src/runtime/stack1.go:759 +0xa01
runtime.morestack()
        /data2/ds/local/go/src/runtime/asm_amd64.s:330 +0x82

goroutine 417 [stack growth]:
net.(*netFD).Read(0xc2084632d0, 0xc208b9a000, 0x1000, 0x1000, 0x4b8338, 0xc208d2acc8, 0xffffffff)
        /data2/ds/local/go/src/net/fd_unix.go:220 fp=0xc208cc66b0 sp=0xc208cc66a8
net.(*conn).Read(0xc208b06080, 0xc208b9a000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/net/net.go:124 +0xe4 fp=0xc208cc6718 sp=0xc208cc66b0
net/http.(*liveSwitchReader).Read(0xc208d2acc8, 0xc208b9a000, 0x1000, 0x1000, 0xc207ee45a2, 0x0, 0x0)
        /data2/ds/local/go/src/net/http/server.go:212 +0xa4 fp=0xc208cc6768 sp=0xc208cc6718
io.(*LimitedReader).Read(0xc2083e8280, 0xc208b9a000, 0x1000, 0x1000, 0x6262a0, 0x0, 0x0)
        /data2/ds/local/go/src/io/io.go:427 +0xbd fp=0xc208cc67b8 sp=0xc208cc6768
bufio.(*Reader).fill(0xc208b6eb40)
        /data2/ds/local/go/src/bufio/bufio.go:97 +0x1e9 fp=0xc208cc6878 sp=0xc208cc67b8
bufio.(*Reader).ReadSlice(0xc208b6eb40, 0xc207e2c70a, 0x0, 0x0, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/bufio/bufio.go:328 +0x21a fp=0xc208cc68c0 sp=0xc208cc6878
bufio.(*Reader).ReadLine(0xc208b6eb40, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/bufio/bufio.go:357 +0x53 fp=0xc208cc6910 sp=0xc208cc68c0
net/textproto.(*Reader).readLineSlice(0xc2091d28d0, 0x0, 0x0, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/net/textproto/reader.go:55 +0x81 fp=0xc208cc69b8 sp=0xc208cc6910
net/textproto.(*Reader).ReadLine(0xc2091d28d0, 0x0, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/net/textproto/reader.go:36 +0x40 fp=0xc208cc6a18 sp=0xc208cc69b8
net/http.ReadRequest(0xc208b6eb40, 0xc20ba705b0, 0x0, 0x0)
        /data2/ds/local/go/src/net/http/request.go:624 +0xb6 fp=0xc208cc6b90 sp=0xc208cc6a18
net/http.(*conn).readRequest(0xc208d2ac80, 0x0, 0x0, 0x0)
        /data2/ds/local/go/src/net/http/server.go:614 +0x255 fp=0xc208cc6c50 sp=0xc208cc6b90
net/http.(*conn).serve(0xc208d2ac80)
        /data2/ds/local/go/src/net/http/server.go:1217 +0x727 fp=0xc208cc6fa8 sp=0xc208cc6c50
runtime.goexit()
        /data2/ds/local/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc208cc6fb0 sp=0xc208cc6fa8
created by net/http.(*Server).Serve
        /data2/ds/local/go/src/net/http/server.go:1807 +0x3f6

Stack3

Sun Jun 14 19:19:32 CEST 2015
stkbarPos=1 len(stkbar)=1 goid=301 gcphase=2
fatal error: g already has stack barriers

runtime stack:
runtime.throw(0x7403d0, 0x1c)
        /data2/ds/local/go/src/runtime/panic.go:527 +0x96
runtime.scanstack(0xc2091c4840)
        /data2/ds/local/go/src/runtime/mgcmark.go:334 +0x4f4
runtime.gcphasework(0xc2091c4840)
        /data2/ds/local/go/src/runtime/mgcmark.go:273 +0x6d
runtime.newstack()
        /data2/ds/local/go/src/runtime/stack1.go:759 +0xa01
runtime.morestack()
        /data2/ds/local/go/src/runtime/asm_amd64.s:330 +0x82

goroutine 301 [stack growth]:
sync.(*Mutex).Unlock(0xc2088475b8)
        /data2/ds/local/go/src/sync/mutex.go:99 fp=0xc20a1c7c20 sp=0xc20a1c7c18
net/http.(*conn).hijacked(0xc208847540, 0x7f163e544000)
        /data2/ds/local/go/src/net/http/server.go:137 +0x7d fp=0xc20a1c7c40 sp=0xc20a1c7c20
net/http.(*conn).serve(0xc208847540)
        /data2/ds/local/go/src/net/http/server.go:1260 +0xbfb fp=0xc20a1c7f98 sp=0xc20a1c7c40
runtime.goexit()
        /data2/ds/local/go/src/runtime/asm_amd64.s:1700 +0x1 fp=0xc20a1c7fa0 sp=0xc20a1c7f98
created by net/http.(*Server).Serve
        /data2/ds/local/go/src/net/http/server.go:1807 +0x3f6