[Orca-users] Segmentation Fault

[orca at bias.org]

Thanks for the suggestion.  I tried increasing ulimit, but that did not 
solve.

I do a lot of lun adding/removing luns (daily) on Solaris 8 and Solaris 10 
boxes.  I have not seen the issue at all on Solaris 8.  On Solaris 10, I 
have a boxes with over a thousands luns that have never changed since 
built and they do not have the issue.  I only see the issue when I remove 
luns.  I can fix it by removing all the devices and then rebuilding (tar) 
from cdrom or network boot.

Regards,
Liston


On Fri, 4 Nov 2005, Cockcroft, Adrian wrote:

> 250-ish sounds like a file descriptor limit issue
>
> Try increasing the limit in the shell and see if it fails at a different
> point, you can use ulimit -n to check and set the limit
>
> The opendir call uses a fd for each directory it opens, I'm not sure why
> this would be an issue for you and not others, perhaps your directory
> structure is different somehow and the directories aren't being closed
> properly in the code, so this function would leak file descriptors.
>
> Adrian
>
> -----Original Message-----
> From: orca-users-bounces+acockcroft=ebay.com at orcaware.com
> [mailto:orca-users-bounces+acockcroft=ebay.com at orcaware.com] On Behalf
> Of orca at bias.org
> Sent: Friday, November 04, 2005 8:23 AM
> To: orca-users at orcaware.com
> Subject: RE: [Orca-users] Segmentation Fault
>
> On Thu, 29 Sep 2005, Cockcroft, Adrian wrote:
>
>> 3)  the problem below seems to be that its reading a directory and
>> getting a bad directory entry that is crashing it when it dereferences
>
>> the pointer. This is not the same as the common problem of running out
>
>> of disk slots. You san see that the current index is 30, and the size
> is
>> 540 in the debug output below.
>
> Found a workaround for Segmentation Fault(coredump) when trying to start
>
> orcallator on system where I have removed luns previously there.  Doing
> a
> reconfiguration reboot did not resolve this issues.
>
> The issue appears to be with SE when doing:
>
>   setup_diskinfo_inst()
>   in /opt/RICHPse/include/diskinfo.se
>
> I can test that the issue exist by running:
>
>   # /opt/RICHPse/bin/se disks.se
>
> The diskinfo.se creates a listing of diskinfo by searching /dev/dsk.  I
> checking this directory for invalid entires and I could not find any.
>
> I copied all the links in /dev/dsk to /dev2/dsk and made the following
> change in /opt/RICHPse/include/diskinfo.se:
>
>   string disk_dirs[3] = { "/dev2/dsk", "/dev/osa/dev/dsk", nil };A
>
> One by one, I tested every link (~1800) individually, running se, and
> then
> moving it out.  All links works fine.  I received no Segmentation Faults
>
> during this test.
>
> I then testing moving them in, running se, and NOT moving them out.
>
> When I get to about 250 directory entries, it starts to Segmentation
> Fault.  I changed which 250 exist by manually selecting the order and
> received the same result.
>
> I don't need stats on all these disk so I just picked the one that are
> most critical and never change to be in the directory /dev2/dsk and am
> now
> able to start orcallator.
>
> If this helps identify a more global solution, please let me know.
>
> Regards,
> Liston
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