Re: After reload, nginx's CPU usage jumped to 100 percent（backtrace provided)

[杨镭]

Hi,

we didn't take core dump. If we can reproduce the problem, I'll bring you
the p *fcn content.

On Tue, Jul 12, 2011 at 10:08 PM, Maxim Dounin <mdounin at mdounin.ru> wrote:

> Hello!
>
> On Tue, Jul 12, 2011 at 09:31:07PM +0800, 杨镭 wrote:
>
> > After reload, all the worker processes, including newly forked ones, goes
> > straight to 100% CPU:
>
> [...]
>
> > Also, we took backtrace for cache manger process:
> >
> >
> > Attaching to process 17306
> > ngx_http_file_cache_expire (data=<value optimized out>) at
> > src/http/ngx_http_file_cache.c:1096
> > 1096            if (fcn->count == 0) {
> > (gdb) bt
> > #0  ngx_http_file_cache_expire (data=<value optimized out>) at
> > src/http/ngx_http_file_cache.c:1096
>
> Could you please show
>
> p *fcn
>
> ?
>
> I think I see the problem, but just to make sure.
>
> If you are able to reproduce the problem please try the following
> patch:
>
> diff --git a/src/http/ngx_http_file_cache.c
> b/src/http/ngx_http_file_cache.c
> --- a/src/http/ngx_http_file_cache.c
> +++ b/src/http/ngx_http_file_cache.c
> @@ -1099,7 +1099,8 @@ ngx_http_file_cache_expire(ngx_http_file
>         }
>
>         if (fcn->deleting) {
> -            continue;
> +            wait = 1;
> +            break;
>         }
>
>         p = ngx_hex_dump(key, (u_char *) &fcn->node.key,
>
>
> Maxim Dounin
>
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>



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lei yang
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