[Freeswitch-users] failed to wait for I/O

[Troy Anderson]

When looking at the code, it looks like it's a case of a poll() call returning EINTR, which, I think means that the poll() should be retried in stead of returning an error.  Does this sound like the solution?

Thanks,
Troy

On Nov 12, 2010, at 10:26 AM, Anthony Minessale wrote:

> sigh, another case of DAHDI issues.
> 
> 
> On Fri, Nov 12, 2010 at 10:25 AM, Troy Anderson
> <freeswitch at tlainvestments.com> wrote:
>> Thanks for the code change providing additional diagnostics.  I finally saw another call drop, but didn't have full logging on at the time.  The additional logging provided the following:
>> 
>> 2010-11-12 11:12:54.906656 [ERR] ftmod_zt.c:904 [s1c23][1:23] Failed to poll DAHDI device: Interrupted system call
>> 2010-11-12 11:12:54.906656 [ERR] ftmod_zt.c:904 [s1c19][1:19] Failed to poll DAHDI device: Interrupted system call
>> 2010-11-12 11:12:54.906656 [WARNING] mod_freetdm.c:660 failed to wait for I/O
>> 2010-11-12 11:12:54.906656 [WARNING] mod_freetdm.c:660 failed to wait for I/O
>> 2010-11-12 11:12:54.906656 [ERR] ftmod_zt.c:904 [s1c20][1:20] Failed to poll DAHDI device: Interrupted system call
>> 2010-11-12 11:12:54.906656 [WARNING] mod_freetdm.c:660 failed to wait for I/O
>> 2010-11-12 11:12:54.906656 [ERR] ftmod_zt.c:904 [s1c21][1:21] Failed to poll DAHDI device: Interrupted system call
>> 2010-11-12 11:12:54.906656 [WARNING] mod_freetdm.c:660 failed to wait for I/O
>> 
>> I'll turn up logging and see what shows up next time, but any ideas on what may cause this?
>> 
>> Thanks!
>> Troy
>> 
>> On Nov 6, 2010, at 2:17 PM, Moises Silva wrote:
>> 
>>> On Fri, Nov 5, 2010 at 12:58 PM, Troy Anderson
>>> <freeswitch at tlainvestments.com> wrote:
>>>> We have an installation with a dual PRI and lots of call volume.  Among many successful calls each day, we have been experiencing a one or two dropped per day, and they always coincide with a "failed to wait for I/O" warning from mod_freetdm.  I have attempted to track down the root cause in the source and by poring over the logs, but cannot figure it out.  I have included the redacted logs here.  The log file in question is 10MB and has lots of call data that doesn't relate - I know I risked removing something important, but I tried to put in all the data related to this call.
>>>> 
>>>> I appreciate any insights or advice on tracking this down.
>>>> 
>>> 
>>> If you update your git tree you will be able to get more information
>>> the next time it happens. I added some code to print the reason for
>>> that error to happen.
>>> 
>>> Moises Silva
>>> Senior Software Engineer
>>> Sangoma Technologies Inc. | 100 Renfrew Drive, Suite 100, Markham ON
>>> L3R 9R6 Canada
>>> t. 1 905 474 1990 x128 | e. moy at sangoma.com
>>> 
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>> 
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> 
> 
> 
> -- 
> Anthony Minessale II
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