Nginx Timer is killing my request pool

Tigran Bayburtsyan tigran.bayburtsyan at gmail.com
Sat Feb 21 21:28:21 UTC 2015


Ok I sow that code during debugging Nginx request , but why my request is
freeing if I'm not calling ngx_http_finalize_request ?
What should I do to keep my request alive ?

Thanks.

2015-02-22 1:23 GMT+04:00 tommy watson <tommywatson+nginx-devel at gmail.com>:

> My money is on your request has been cleaned up in ngx_http_free_request():
>
>
> https://github.com/nginx/nginx/blob/master/src/http/ngx_http_request.c#L3493
>
> On Sat, Feb 21, 2015 at 3:19 PM, Tigran Bayburtsyan <
> tigran.bayburtsyan at gmail.com> wrote:
>
>> No this time I'm trying to do it with separate process by just sharing
>> memory between Nginx worker and my 3rd party excusable...
>> I'm making ngx_timer to send data when it will be received from shared
>> memory.
>>
>> It works fine, but I can't figure out why my r->pool is null ?
>>
>> I'm using Nginx 1.7 version.
>> Thanks for your help.
>>
>>
>> 2015-02-22 1:02 GMT+04:00 tommy watson <tommywatson+nginx-devel at gmail.com
>> >:
>>
>>> Tigran,
>>>   are you still using fork() ? As you describe here:
>>> http://mailman.nginx.org/pipermail/nginx-devel/2015-February/006554.html
>>>
>>>  If so, as already explained, the other process is probably closing your
>>> request.
>>>
>>> Cheers.
>>>
>>>
>>> On Sat, Feb 21, 2015 at 2:55 PM, Tigran Bayburtsyan <
>>> tigran.bayburtsyan at gmail.com> wrote:
>>>
>>>> Hi All.
>>>>
>>>> I've created a function for adding my custom ngx_timer , but after 1st
>>>> time loop my r->pool is setting to NULL , also it sets NULL my
>>>> r->connection->log, and after second loop it throws exception on  *ngx_palloc
>>>> *because my r->pool is NULL.
>>>> I can't find out why, here is my function
>>>>
>>>> *void add_aling_event(ngx_event_t *e, ngx_http_request_t *r, void
>>>> (*handler), int timer)*
>>>> *{*
>>>> *    if(e)*
>>>> *    {*
>>>> *        ngx_add_timer(e, timer);*
>>>> *        return;*
>>>> *    }*
>>>> *    ngx_event_t *event=ngx_palloc(r->pool,sizeof(ngx_event_t));*
>>>> *    memset(event,0,sizeof(ngx_event_t));*
>>>> *    event->data=r;*
>>>> *    event->handler=handler;*
>>>> *    event->log=r->connection->log;*
>>>> *    ngx_add_timer(event, timer);*
>>>> *}*
>>>>
>>>> And I'm calling this function like this.
>>>>
>>>> static ngx_int_t ngx_http_aling_handler(ngx_http_request_t *r)
>>>> {
>>>>     ........
>>>>     ........
>>>>     add_aling_event(NULL, r, hack_func, 50);
>>>>     return NGX_AGAIN;
>>>> }
>>>>
>>>> void hack_func(ngx_event_t *e)
>>>> {
>>>>     ngx_http_request_t *r = e->data;
>>>>     ........
>>>>     ........
>>>>
>>>>     switch(shmLen[1])
>>>>     {
>>>>         case 1: // adding chain
>>>>         {
>>>>             ..........................
>>>> *            ..........................*
>>>>         };break;
>>>>         case 2: // adding last chain
>>>>         {
>>>>             ..........................
>>>> *            ..........................*
>>>>         };break;
>>>>         default:
>>>>         {
>>>>             add_aling_event(e, r, hack_func, 50);
>>>>         };break;
>>>>     }
>>>> }
>>>>
>>>> After 1 or 2 calls r->pool is sets to NULL .....
>>>>
>>>> Please help me figure out this issue.
>>>> Maybe I'm doing something wrong.
>>>> I've did this code using example here
>>>> https://github.com/tommywatson/nginx-hello-world-module/blob/master/ngx_http_hello_world_module.c#L104
>>>>
>>>>
>>>> Thanks.
>>>>
>>>> _______________________________________________
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>>>> nginx-devel at nginx.org
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>>>>
>>>
>>>
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>>
>>
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>
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