[AG-TECH] Video Producer Service fails to start

Mon Feb 12 11:10:27 CST 2007

Mike:

I'm able to reproduce that problem with the VideoProducerService and
the AudioService.  It comes down to a bad check in the service code,
where it wants to start the service even though it doesn't have any
stream information.  The error is certainly misleading, but it is
harmless.  Does everything function fine once you enter a Venue?

We'll silence the misleading error in the code.

Tom

On 2/9/07 6:15 AM, Mike Weaver wrote:
> Chris,
> It's 'fixed' in the sense that I'm successfully using the VideoService
> now instead of the VideoProducerService, but it's a hard error in the
> VPS, every time.
>
> The problem occurs when configuring the node, specifically when I try to
> enable the video.  I haven't even gotten to a venue yet.
>
> Mike
>
> -----Original Message-----
> From: Christoph Willing [mailto:willing at vislab.uq.edu.au] 
> Sent: Friday, February 09, 2007 01:39
> To: weaver at ascr.doe.gov
> Cc: ag-tech at mcs.anl.gov; Douglas Kosovic
> Subject: Re: [AG-TECH] Video Producer Service fails to start
>
>
> On 02/02/2007, at 9:56 PM, Mike Weaver wrote:
>
>   
>> Apologies if this shows up twice, but it's been almost 18 hours,  
>> nobody's
>> queues run that long!  Also, Chris & Doug, I hope you don't mind me  
>> copying
>> you directly.
>>     
>
>
> Mike,
>
> There's no clear answer yet, but we've seen the problem occasionally  
> on multiple systems, ruling out a distribution related solution.
>
> Can the problem be consistently reproduced? One thing I've noticed is  
> that sometimes the problem has just gone away if I come back to it  
> another day.
>
> Another thing to try is to re-enter the venue. This updates the  
> stream information in the VenueClient from the venue i.e. the service  
> in question may then be using "better" stream information.
>
>
> chris
>
>
>
>
>   
>> -----Original Message-----
>> From: Mike Weaver [mailto:weaver at mics.doe.gov]
>> Sent: Thursday, February 01, 2007 13:29
>> To: 'AG-TECH list'
>> Subject: RE: [AG-TECH] Video Producer Service fails to start
>>
>> Hi all,
>>
>> I finally had time to start looking at this again.  This problem is in
>> reference to AG 3.0.2 on Fedora Core 6.  The actual error (detailed  
>> below)
>> is
>>
>> VideoProducerService.py", line 279, in Start
>>     if self.streamDescription.encryptionFlag != 0:
>> AttributeError: 'int' object has no attribute 'encryptionFlag'
>>
>> Python seems to be misinterpreting the data type of the  
>> streamDescription
>> object.  Hacks to comment out this check, or surround it with a  
>> 'hasattr'
>> check only cause failures further in the code.
>>
>> The really annoying thing about this, is that the AudioService.py  
>> module
>> (different machine) has almost identical code and runs fine.  The  
>> audio &
>> video machines use the same motherboard, BIOS, chipsets, etc...   
>> Both are
>> fresh installs of Fedora Core 6, fully patched with the latest AG3  
>> & 2.4
>> compatibility RPMs from the UQ repository.  All python packages are
>> identical, same packages, same versions.
>>
>> I'm no python guru, but I have a (outdated) software development  
>> background
>> and I just can't understand how this can be.  Same platform, same  
>> OS, same
>> libraries, same versions, same code - different results.
>>
>> Anyone out there have any ideas?  I'm willing to try other Linux  
>> distros,
>> but we run RHEL on our production servers so I'd like to stay with  
>> Fedora
>> for consistency's sake.
>>
>> I've attached both the AudioService.log & VideoProducerService.log  
>> files for
>> review & comparison.
>>
>> Thanks,
>>
>> Mike
>>
>> -----Original Message-----
>> From: Rhys Hawkins [mailto:rhys.hawkins at anu.edu.au]
>> Sent: Tuesday, November 14, 2006 17:32
>> To: Christoph Willing
>> Cc: weaver at er.doe.gov; AG-TECH list
>> Subject: Re: [AG-TECH] Video Producer Service fails to start
>>
>>
>> Hi Chris, Mike,
>>
>> This looks like the same thing that bit me when testing UQs h263  
>> stuff.
>> If the streamDescription is an int, then the VideoProducer service
>> doesn't stand much of a chance being able to start. It appears to be
>> a bug that rears its ugly head when you least expect it, ie I've just
>> tested this again and now I don't see the same problem ...
>>
>> It would be interesting to know if this is restricted to Fedora or if
>> it occurs on other ports.
>>
>> Cheers,
>>     Rhys
>>
>> On Wed, 15 Nov 2006 08:11:12 +1000
>> Christoph Willing <willing at vislab.uq.edu.au> wrote:
>>
>>     
>>> On 15/11/2006, at 6:16 AM, Mike Weaver wrote:
>>> []
>>>       
>>>> The relevant part of the VideoProducerService.log seems to be:
>>>>
>>>> 11/14/06 14:45:05 -1225061488 Toolkit     VideoProducerService.py:
>>>> 309 ERROR
>>>> Exception in VideoProducerService.Start
>>>> Traceback (most recent call last):
>>>>   File
>>>> "/home/micsag/.AccessGrid3/local_services/VideoProducerService/
>>>> VideoProducer
>>>> Service.py", line 279, in Start
>>>>     if self.streamDescription.encryptionFlag != 0:
>>>> AttributeError: 'int' object has no attribute 'encryptionFlag'
>>>>         
>>> Mike,
>>>
>>> A short term fix is to edit the file .AccessGrid3/local_services/
>>> VideoProducerService/VideoProducerService.py by changing the line:
>>> 	if self.streamDescription.encryptionFlag != 0:
>>> to
>>> 	if hasattr(self.streamDescription, 'encryptionFlag') and
>>> self.streamDescription.encryptionFlag != 0:
>>>
>>>
>>>
>>> chris
>>>
>>>
>>> Christoph Willing                       +61 7 3365 8350
>>> QCIF Access Grid Manager
>>> University of Queensland
>>>
>>>
>>>
>>> <AudioService.log>
>>> <VideoProducerService.log>
>>>       
>
> Christoph Willing                       +61 7 3365 8350
> QCIF Access Grid Manager
> University of Queensland
>
>
>
>   