Hi Ian,
Initially the program giving err driver: bad connection for rows.Err(). So
I added panic with that error to get the stack trace.
for rows.Next() {
//stats calculation
}
if err := rows.Err(); err != nil {
panic(err) *// this is line 498*
}
rows.Close()
How can find out the reason for that error? Do I need to search in the
library github.com/alexbrainman/odbc
<http://www.google.com/url?q=http%3A%2F%2Fgithub.com%2Falexbrainman%2Fodbc&sa=D&sntz=1&usg=AFQjCNHY28LYBk3w52Tg_SY8noRnErJhqw>
code?
On Friday, July 8, 2016 at 8:29:52 PM UTC+5:30, Ian Lance Taylor wrote:
>
> On Fri, Jul 8, 2016 at 7:50 AM, Raj <rajenderre...@gmail.com <javascript:>>
> wrote:
> > By the way I am using go1.7 beta2. Same error was appearing with go1.6
> also.
> >
> > What does those 8 minutes mean in stack trace?
>
> Those annotations mean that those goroutines have been sitting around
> waiting for something to happen for 8 minutes.
>
> The stack trace is pointing you at line 498 of compstats.go. That
> line is apparently panicing for some reason. I would start there.
>
> Ian
>
>
>
> > On Friday, July 8, 2016 at 8:13:26 PM UTC+5:30, Raj wrote:
> >>
> >> Hi,
> >>
> >> My program which has 10 user gourotines to read tables from a database
> and
> >> generates some stats. I am using github.com/alexbrainman/odbc
> <http://www.google.com/url?q=http%3A%2F%2Fgithub.com%2Falexbrainman%2Fodbc&sa=D&sntz=1&usg=AFQjCNHY28LYBk3w52Tg_SY8noRnErJhqw>
>
> to connect SQL
> >> Server 2012.
> >>
> >> I am getting driver: bad connection frequently, but not always. Can
> >> somebody help me in debugging this?
> >>
> >>
> >> Sart of the stack trace....
> >>
> >> panic: driver: bad connection
> >>
> >> goroutine 18 [running]:
> >> panic(0x4fa740, 0xc04200c2b0)
> >> C:/Go/src/runtime/panic.go:500 +0x1af fp=0xc0421d70f0
> sp=0xc0421d7060
> >> main.process(0xc0420e4000, 0xc042165070)
> >> C:/Users/tgmsaven1/go/src/
> github.com/TGMNY/compstats/compstats.go:498
> >> +0x274a fp=0xc0421d7f80 sp=0xc0421d70f0
> >> runtime.goexit()
> >> C:/Go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc0421d7f88
> >> sp=0xc0421d7f80
> >> created by main.main
> >> C:/Users/tgmsaven1/go/src/
> github.com/TGMNY/compstats/compstats.go:268
> >> +0xfc4
> >>
> >> goroutine 1 [semacquire, 8 minutes]:
> >> runtime.gopark(0x534e98, 0x5b4140, 0x51b357, 0xa, 0x19, 0x4)
> >> C:/Go/src/runtime/proc.go:259 +0x14f fp=0xc0424dd680
> sp=0xc0424dd650
> >> runtime.goparkunlock(0x5b4140, 0x51b357, 0xa, 0xc042072219, 0x4)
> >> C:/Go/src/runtime/proc.go:265 +0x65 fp=0xc0424dd6c0 sp=0xc0424dd680
> >> runtime.semacquire(0xc04216507c, 0x1)
> >> C:/Go/src/runtime/sema.go:111 +0x222 fp=0xc0424dd728
> sp=0xc0424dd6c0
> >> sync.runtime_Semacquire(0xc04216507c)
> >> C:/Go/src/runtime/sema.go:47 +0x37 fp=0xc0424dd748 sp=0xc0424dd728
> >> sync.(*WaitGroup).Wait(0xc042165070)
> >> C:/Go/src/sync/waitgroup.go:131 +0x9e fp=0xc0424dd798
> sp=0xc0424dd748
> >> main.main()
> >> C:/Users/tgmsaven1/go/src/
> github.com/TGMNY/compstats/compstats.go:310
> >> +0x16c4 fp=0xc0424ddf48 sp=0xc0424dd798
> >> runtime.main()
> >> C:/Go/src/runtime/proc.go:183 +0x1f0 fp=0xc0424ddfa0
> sp=0xc0424ddf48
> >> runtime.goexit()
> >> C:/Go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc0424ddfa8
> >> sp=0xc0424ddfa0
> >>
> >> goroutine 2 [force gc (idle), 8 minutes]:
> >> runtime.gopark(0x534e98, 0x5ac210, 0x51c25d, 0xf, 0x534d14, 0x1)
> >> C:/Go/src/runtime/proc.go:259 +0x14f fp=0xc04205ff28
> sp=0xc04205fef8
> >> runtime.goparkunlock(0x5ac210, 0x51c25d, 0xf, 0xc042058014, 0x1)
> >> C:/Go/src/runtime/proc.go:265 +0x65 fp=0xc04205ff68 sp=0xc04205ff28
> >> runtime.forcegchelper()
> >> C:/Go/src/runtime/proc.go:224 +0xb6 fp=0xc04205ffa0 sp=0xc04205ff68
> >> runtime.goexit()
> >> C:/Go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc04205ffa8
> >> sp=0xc04205ffa0
> >> created by runtime.init.4
> >> C:/Go/src/runtime/proc.go:213 +0x3c
> >>
> >> goroutine 3 [GC sweep wait]:
> >> runtime.gopark(0x534e98, 0x5ac3e0, 0x51bb3d, 0xd, 0x462c14, 0x1)
> >> C:/Go/src/runtime/proc.go:259 +0x14f fp=0xc042061f18
> sp=0xc042061ee8
> >> runtime.goparkunlock(0x5ac3e0, 0x51bb3d, 0xd, 0x14, 0x1)
> >> C:/Go/src/runtime/proc.go:265 +0x65 fp=0xc042061f58 sp=0xc042061f18
> >> runtime.bgsweep(0xc0420040e0)
> >> C:/Go/src/runtime/mgcsweep.go:79 +0x13c fp=0xc042061f98
> >> sp=0xc042061f58
> >> runtime.goexit()
> >> C:/Go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc042061fa0
> >> sp=0xc042061f98
> >> created by runtime.gcenable
> >> C:/Go/src/runtime/mgc.go:195 +0x68
> >>
> >> goroutine 4 [finalizer wait, 8 minutes]:
> >> runtime.gopark(0x534e98, 0x5c6870, 0x51bf5c, 0xe, 0x14, 0x1)
> >> C:/Go/src/runtime/proc.go:259 +0x14f fp=0xc04205bee8
> sp=0xc04205beb8
> >> runtime.goparkunlock(0x5c6870, 0x51bf5c, 0xe, 0x14, 0x1)
> >> C:/Go/src/runtime/proc.go:265 +0x65 fp=0xc04205bf28 sp=0xc04205bee8
> >> runtime.runfinq()
> >> C:/Go/src/runtime/mfinal.go:158 +0xc1 fp=0xc04205bfa0
> sp=0xc04205bf28
> >> runtime.goexit()
> >> C:/Go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc04205bfa8
> >> sp=0xc04205bfa0
> >> created by runtime.createfing
> >> C:/Go/src/runtime/mfinal.go:139 +0x7a
> >>
> >> goroutine 5 [chan receive, 8 minutes]:
> >> runtime.gopark(0x534e98, 0xc042072298, 0x51b961, 0xc, 0x17, 0x3)
> >> C:/Go/src/runtime/proc.go:259 +0x14f fp=0xc04205de60
> sp=0xc04205de30
> >> runtime.goparkunlock(0xc042072298, 0x51b961, 0xc, 0x17, 0x3)
> >> C:/Go/src/runtime/proc.go:265 +0x65 fp=0xc04205dea0 sp=0xc04205de60
> >> runtime.chanrecv(0x4f1220, 0xc042072240, 0xc04205df80, 0x1, 0x0)
> >> C:/Go/src/runtime/chan.go:496 +0x2ed fp=0xc04205df28
> sp=0xc04205dea0
> >> runtime.chanrecv2(0x4f1220, 0xc042072240, 0xc04205df80, 0x0)
> >> C:/Go/src/runtime/chan.go:383 +0x35 fp=0xc04205df60 sp=0xc04205df28
> >> database/sql.(*DB).connectionOpener(0xc0420e4000)
> >> C:/Go/src/database/sql/sql.go:727 +0x51 fp=0xc04205df98
> >> sp=0xc04205df60
> >> runtime.goexit()
> >> C:/Go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc04205dfa0
> >> sp=0xc04205df98
> >> created by database/sql.Open
> >> C:/Go/src/database/sql/sql.go:493 +0x1ec
> >>
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