[OpenSIPS-Users] FIFO very fragile

[Vlad Paiu]

Hello,

Yes, there is no need to restart. The fifo engine attempts to flush any 
extra bogus characters whenever an error occurs, but it blocking 
attempts to clear them until it encounters a carriage return.

Just push an extra carriage return to the fifo and that should clear out 
the previous empty command and make it accept new MI requests again.


Regards,

-- 
Vlad Paiu
OpenSIPS Developer




On 05/11/2011 04:58 PM, Brett Nemeroff wrote:
>
> On Wed, May 11, 2011 at 8:51 AM, Vlad Paiu <vladpaiu at opensips.org 
> <mailto:vladpaiu at opensips.org>> wrote:
>
>     Hello Brett,
>
>     A well formed MI command should end with two '\n\n' characters.
>     When you do
>
>         echo -e ":address_dump:my_fifo\n\n"
>
>     ,your MI command ends with three '\n', because echo adds an extra
>     \n at the end, unless you use the -n parameter.
>
>     So what happens is that OpenSIPS successfully processes your
>     address_dump MI command, and then reads the third \n.
>     It treats it as an empty MI command, and attempts to block and
>     read the second \n signaling the end of the MI command, and there
>     it gets stuck.
>
>
> Vlad,
> Thanks for this explaination, that makes a *lot* of sense. However, I 
> feel like sending "crap" to the fifo shouldn't break it, right? At 
> least, it should eventually clear itself out or reset itself without 
> requiring a restart. Right? If I had sent it just one more carriage 
> return, do you think it would clear it out?
>
> -Brett
>
>
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