With the help of a couple folks on IRC (thanks richm, uffe!), here's
what I figured out I can do:
In order to get two machines doing MMR again, I first got rid of any
MMR agreements between them, and then shut them both down. Then I
chose one and exported the LDAP database with:
/opt/fedora-ds/slapd-instance/db2ldif -n userRoot
I copied the LDIF file to the other node. Then I imported it on both:
/opt/fedora-ds/slapd-instance/ldif2db -n userRoot -i /
/opt/fedora-ds/slapd-instance/ldif/2007_03_22_141131.ldif
Then I went into the changelogdb/ folder and blew away all of the
__db.*, *.db4, and log.* files. At this point, I started Fedora DS on
both nodes again. I then used mmr.pl to re-initialize the MMR
agreement between the two of them, and all was well.
I've now got MMR working again between three nodes; the fourth will
get added back in late tonight.
This may be more cautious than is necessary, but it's working.
I still have no clue what caused this initially, but I don't really
care (unless it happens again).
Thanks for everyone's help!
Chris St. Pierre
Unix Systems Administrator
Nebraska Wesleyan University
On Thu, 22 Mar 2007, Chris St. Pierre wrote:
Sometime earlier this week (still trying to determine when), the
multi-master replication on one of our databases broke. I tried to
reinitialize it between a few of the hosts, and I got a bunch of
errors:
[22/Mar/2007:09:27:39 -0500] NSMMReplicationPlugin -
multimaster_be_state_change: replica o=isp is going offline; disabling
replication
[22/Mar/2007:09:27:41 -0500] - WARNING: Import is running with
nsslapd-db-private-import-mem on; No other process is allowed to
access the database
[22/Mar/2007:09:27:45 -0500] - ERROR bulk import abandoned
[22/Mar/2007:09:27:45 -0500] - import userRoot: Aborting all import
threads...
[22/Mar/2007:09:27:53 -0500] - import userRoot: Import threads
aborted.
[22/Mar/2007:09:27:53 -0500] - import userRoot: Closing files...
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/owner.db4: unable to
flush: No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/mail.db4: unable to
flush: No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/modifytimestamp.db4:
unable to flush: No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/telephoneNumber.db4:
unable to flush: No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/nsUniqueId.db4: unable
to flush: No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/objectclass.db4: unable
to flush:No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/ou.db4: unable to
flush: No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/icsCalendar.db4: unable
to flush:No such file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/sambaSID.db4: unable to
flush: Nosuch file or directory
[22/Mar/2007:09:27:56 -0500] - libdb: userRoot/givenName.db4: unable
to flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/gidnumber.db4: unable
to flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/createtimestamp.db4:
unable to flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/cn.db4: unable to
flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/sn.db4: unable to
flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/uid.db4: unable to
flush: No suchfile or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/uidNumber.db4: unable
to flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/aci.db4: unable to
flush: No suchfile or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/uniquemember.db4:
unable to flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/parentid.db4: unable to
flush: Nosuch file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/entrydn.db4: unable to
flush: No such file or directory
[22/Mar/2007:09:27:57 -0500] - libdb: userRoot/id2entry.db4: unable to
flush: Nosuch file or directory
[22/Mar/2007:09:27:57 -0500] - import userRoot: Import failed.
[22/Mar/2007:09:27:57 -0500] - process_bulk_import_op: NULL backend
This erased the database, and I was left with no data. Subsequently,
I've restarted FDS, restored from backup using bak2db.pl, and it still
doesn't work.
Any ideas?
Chris St. Pierre
Unix Systems Administrator
Nebraska Wesleyan University
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