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[Alessandro Tagliapietra <tagliapietra.alessandro@xxxxxxxxx>]

After an strace of lsof I've seen it hangs on

stat("/proc/1227/", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0 open("/proc/1227/stat", O_RDONLY) = 4 read(4, "1227 (nova-dhcpbridge) D 1224 25"..., 4096) = 242 close(4) = 0 readlink("/proc/1227/cwd", "/"..., 4096) = 1 stat("/proc/1227/cwd", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 readlink("/proc/1227/root", "/", 4096) = 1 stat("/proc/1227/root", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 readlink("/proc/1227/exe", "/usr/bin/python2.7"..., 4096) = 18 stat("/proc/1227/exe", {st_mode=S_IFREG|0755, st_size=2989480, ...}) = 0 open("/proc/1227/maps", O_RDONLY) = 4 read(4,
Could it be a memory issue?
Actually I cannot run the memory test, maybe tomorrow. Just to know if someone else had the same issue.
Thanks in advance

--

Alessandro Tagliapietra  
alexfu.it (http://www.alexfu.it)  

Il giorno lunedì 25 febbraio 2013, alle ore 12:29, Alessandro Tagliapietra ha scritto:  

> Hello guys,  
>  
> at work we've the openstack controller that since some months started to increase its load after some days of uptime.
>  
> I've seen that the cause is that processes sometimes hangs and remain in D state.
>  
> I've used some combination of ps args to get these outputs:
>  
> http://pastebin.com/raw.php?i=LGGzGrWu
> http://pastie.org/pastes/6332964/text
> http://pastie.org/pastes/6332979/text
>  
> The hdd is a soft-raid1 over 2 disks, which SMART values are fine.
>  
> Commands like lsof, strace on a D process doesn't return.
>  
> Any idea on what could be the cause?
>  
> Thanks in advance
>  
> --
>  
> Alessandro Tagliapietra  
> alexfu.it (http://www.alexfu.it)