Re: [Libevent-users] Fwd: Welcome to libevent-users

[Anty Rao <ant.rao@xxxxxxxxx>]

Hi Azat

There is not any special when enable libevent internal logging.

I ask question on openssl mail list to verify whether it's the problem with openssl.Â

The openssl guys said TCP will discard data on receiving RST if application couldn't fetch data from tcp stack in time.

But after looking through the kernel code, linux seems don't discard data when receiving rst.Â

I'm a little lost.Â

On Wed, Dec 2, 2015 at 7:49 PM, Anty Rao <ant.rao@xxxxxxxxx> wrote:

On Wed, Dec 2, 2015 at 7:45 PM, Anty Rao <ant.rao@xxxxxxxxx> wrote:

Hi Azat
The behaviour of my program:

1. one thread produce messages , put it in an queue. if queue size change from 0 to 1, write one byte notify message.

2. the libevent event loop(another thread) receive the notify message, begin to invoke notify callback:

  1. drain some messages from the queue

  2. bufferevent_write to write message.

3. write callback

  1. if output buffer size of bufferevent is > 0 ,return

  2.Âdrain some messages from the queue(if any)

  3. bufferevent_write to write message.

 Â4. read callback

    1. try read response. when server send response, it always means the TCP connection will be close.

On Wed, Dec 2, 2015 at 7:14 PM, Azat Khuzhin <a3at.mail@xxxxxxxxx> wrote:

On Wed, Dec 02, 2015 at 04:30:08PM +0800, Anty Rao wrote:
> Hi Azat
> I break on event callback, here is the result:

Can you describe behaviour of the program more?

I.e. when event callback is triggered, after specific timeout?
Does read/write callback triggered before?

Â

Only write callback triggered.Â

Or you can add some logs into you application and post them here.

Also you can enable libevent internal logging with
event_enable_debug_logging().

I will try.Â

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Anty Rao

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Anty Rao

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Anty Rao