Re: LDAP Stops after full backup

[John Fulton <fultonj@lafayette.edu>]

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Thanks for your reply Michael. Quanah has replied to my post on the
forum and he thinks that it was a lock contention issue. At this point I
have not seen the issue return but will be posting to the forum if it
does along with the results of a db_stat which will report if there are
LDAP deadlocks. I've also replied to your questions below.

http://www.zimbra.com/forums/administrators/28218-ldap-stops-after-full-backup.html#post133524

Michael A. Jastremski wrote:
> - Have you strace'd the process?

No, I was hoping for something higher level, but if I do I'll let you
know. Since I can't reproduce the problem by running the backup I don't
think stracing the slapcat will point out much, aside from revealing
more about how the backup works. If it consistently introduced the
problem then strace would be good.

> - Is any other process such as a backup running during the same window?

Yes, the backup is what I believe to be the cause.

> - Is your ldap/mailstore server dropping packets? (ifconfig eth0, ifconfig eth1, ethtool eth0?)

I haven't checked that.

> - What type of storage is your ldap server using?  

Local RAID1 SAS on a Dell m605 blade.

> - What filesystem and mount options are you using? (output of /bin/mount)

[fultonj@zldap0 ~]$ mount | grep opt
/dev/mapper/vg_root-lv_opt on /opt type ext3 (rw,noatime)
[fultonj@zldap0 ~]$ grep opt /etc/fstab
/dev/vg_root/lv_opt     /opt                    ext3    noatime         1 2
[fultonj@zldap0 ~]$ df /opt/
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/vg_root-lv_opt
                      47580024   1510348  43613716   4% /opt
[fultonj@zldap0 ~]$

> - Have you examined the filesystems with iostat ?

No, I haven't. I will consider trying that if it comes up again. I might
also fsck /opt since I initially wondered if it was a file system issue

> - Any errors in dmesg or /var/log/messages?

No, it revealed nothing specific to Zimbra. /var/log/zimbra also
revealed nothing.

> I'm wondering if somehow one of your ldap directories became unwritable..
> Can you produce an ls -lat listing of your /opt/zimbra/log dir?

[fultonj@zldap0 ~]$ ls -lat /opt/zimbra/log
total 116
drwxr-xr-x  2 zimbra zimbra  4096 Apr  7 09:34 .
- -rw-r-----  1 zimbra zimbra    16 Apr  7 09:34 .zmcontrol.cache
- -rw-r-----  1 zimbra zimbra 28724 Apr  7 09:33 zmmtaconfig.log
- -rw-r-----  1 zimbra zimbra  5393 Apr  7 04:02 zmmtaconfig.log.1.gz
- -rw-r-----  1 zimbra zimbra     4 Apr  7 04:02 zmmtaconfig.pid
- -rw-r-----  1 zimbra zimbra     5 Apr  7 04:02 swatch.pid
- -rw-r--r--  1 zimbra zimbra    78 Apr  7 04:02 zmswatch.out
- -rw-r--r--  1 zimbra zimbra   153 Apr  7 04:02 zmswatch.out.1.gz
- -rw-r-----  1 zimbra zimbra  5411 Apr  6 04:02 zmmtaconfig.log.2.gz
- -rw-r--r--  1 zimbra zimbra   153 Apr  6 04:02 zmswatch.out.2.gz
- -rw-r-----  1 zimbra zimbra  5433 Apr  5 04:02 zmmtaconfig.log.3.gz
- -rw-r--r--  1 zimbra zimbra   157 Apr  5 04:02 zmswatch.out.3.gz
- -rw-r-----  1 zimbra zimbra  5512 Apr  4 04:02 zmmtaconfig.log.4.gz
- -rw-r--r--  1 zimbra zimbra   157 Apr  4 04:02 zmswatch.out.4.gz
- -rw-r-----  1 zimbra zimbra  5397 Apr  3 04:02 zmmtaconfig.log.5.gz
- -rw-r--r--  1 zimbra zimbra   156 Apr  3 04:02 zmswatch.out.5.gz
- -rw-r-----  1 zimbra zimbra     0 Mar 21 10:45 ldif
drwxr-xr-x 30 root   root    4096 Dec 31 05:39 ..
[fultonj@zldap0 ~]$

Thanks,
  John
- --
John Fulton, Assoc. Director IT Systems, 610-330-5650
Lafayette College, 11 Pardee Dr, Easton PA 18042-1775

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