[Orca-users] Segmentation Fault

[Cockcroft, Adrian]

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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