[mythtv-users] Defunct Mythbackend

[Matt Rude]

Kevin Kuphal wrote:
> Matt Rude wrote:
>   
>> Kevin Kuphal wrote:
>>     
>>> Matt Rude wrote:
>>>  
>>>       
>>>> I have be having this problem fro the last few weeks where after a 
>>>> day or so my Mythbackend demon will go defunct and not let me 
>>>> restart the demon
>>>>
>>>> /sbin/service mythbackend restart
>>>> fails every time. the system wont even let me reboot when I try the 
>>>> system will just sit there like as if I didn't tell it to reboot.
>>>> ps -eaf shows me
>>>> root      3673     1  5 00:41 ?        00:41:27 [mythbackend] <defunct>
>>>>
>>>> anyone have any idea what I can look at.
>>>>
>>>>
>>>> This is a Fedora Core 6 system with an Nvida 7300
>>>>     
>>>>         
>>> I have the same problem with a newly updated kernel system.  It 
>>> appears to happen after an IOBOUND message from the backend.   What 
>>> is your disk layout?  Is your /var folder on the same 
>>> filesystem/drive that your recordings are occuring on?  How many and 
>>> what kind of tuners are you using?  I was able to prevent this by 
>>> moving my /var partition (mysql and logging) to a separate drive.  
>>> Now I never have this problem.
>>>
>>> Kevin
>>>   
>>>       
>> My recording directory's (/mythtv/Recorded & /mythtv/Recorded2) are on 
>> different drives
>> but the rest of the system is on a 3rd 80 gig system drive.
>>
>> I am using a PVR-350 (tuner only no TV-out) and a PVR-500 for the tuners
>> TV-Out via a Nvidia 7300
>>
>> so do you currently have the var directory and mysql running on 
>> separate drives or did you remove your recordings from that drive?
>>     
> In my situation, part of my LVM (JFS) array was built from my boot 
> drive.  I added a separate drive and mounted it as /var.  Once I did 
> that, all my problems went away.   In my case though, I was recording 2 
> HD streams and 2 SD streams plus commercial flagging.   It doesn't sound 
> like your situation is exactly analogous to mine.  Do you get IOBOUND 
> messages in your backend logs?
>
> Kevin
>
>   
Yes

grep IOBOUND mythbackend.log
2007-05-15 13:52:24.965 TFW, Error: Write() -- IOBOUND begin cnt(2048) 
free(2047)
2007-05-15 13:52:25.334 TFW, Error: Write() -- IOBOUND begin cnt(2048) 
free(2047)
2007-05-15 13:52:25.513 TFW, Error: Write() -- IOBOUND end
2007-05-15 13:52:25.525 TFW, Error: Write() -- IOBOUND end



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