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slapd consumer deletes entries

Hello,

[I sent this message once but somehow it didn't get through so I
resend it -- my sincere apology if anyone received this twice]

 I am trying to troubleshot a problem with entries being deleted on
 consumer, exactly as described in this thread:
 http://www.openldap.org/lists/openldap-software/200704/msg00248.html

 I am running both provider and consumer on debian etch. After some
searching I see
 some hints that openldap as provided by debian etch (2.3.30) is out of
 date and this bug might be fixed in 2.3.34, I installed openldap from
 sources (2.3.43) on both provider and consumer. But the problem is not
 gone.

 Perhaps it has something to do with the fact that the consumer is not
 online all the time; it is switched on/off daily. I am thinking of
 upgrading to openldap 2.4, but I am still a bit reluctant since the
 configuration syntax has changed.

 Can someone please give me a hint how to proceed further? I appended
 the config file of both provider/consumer below. They were derived
 from debian config files with little modification.

 thanks,
 Tony

Update: it seems that the deletion happens on consumer if  data on
provider have been changed during the period the consumer was off. At
least I can reproduce this consistently.

 slapd.conf on provider:
 # This is the main slapd configuration file. See slapd.conf(5) for more
 # info on the configuration options.

 #######################################################################
 # Global Directives:

 # Features to permit
 #allow bind_v2

 # Schema and objectClass definitions
 include         /etc/ldap/schema/core.schema
 include         /etc/ldap/schema/cosine.schema
 include         /etc/ldap/schema/nis.schema
 include         /etc/ldap/schema/inetorgperson.schema

 ## <added for gosa minimal>
 include         /etc/ldap/schema/gosa/samba3.schema
 include         /etc/ldap/schema/gosa/trust.schema
 include         /etc/ldap/schema/gosa/gosystem.schema
 include         /etc/ldap/schema/gosa/gofon.schema
 include         /etc/ldap/schema/gosa/goto.schema
 include         /etc/ldap/schema/gosa/gosa-samba3.schema
 include         /etc/ldap/schema/gosa/gofax.schema
 include         /etc/ldap/schema/gosa/goserver.schema
 include         /etc/ldap/schema/gosa/goto-mime.schema
 ## </added for gosa minimal>

 ## <added for gosa additional plugins>
 include         /etc/ldap/schema/gosa/fai.schema
 ## </added for gosa additional plugins>


 # Where the pid file is put. The init.d script
 # will not stop the server if you change this.
 pidfile         /var/run/slapd/slapd.pid

 # List of arguments that were passed to the server
 argsfile        /var/run/slapd/slapd.args

 # Read slapd.conf(5) for possible values
 loglevel        0

 # Where the dynamically loaded modules are stored
 modulepath      /usr/lib/ldap
 moduleload      back_bdb
 moduleload syncprov.la

 # The maximum number of entries that is returned for a search operation
 sizelimit 500

 # The tool-threads parameter sets the actual amount of cpu's that is used
 # for indexing.
 tool-threads 1

 #######################################################################
 # Specific Backend Directives for bdb:
 # Backend specific directives apply to this backend until another
 # 'backend' directive occurs
 backend         bdb
 checkpoint 512 30

 #######################################################################
 # Specific Backend Directives for 'other':
 # Backend specific directives apply to this backend until another
 # 'backend' directive occurs
 #backend                <other>

 #######################################################################
 # Specific Directives for database #1, of type bdb:
 # Database specific directives apply to this databasse until another
 # 'database' directive occurs
 database        bdb

 # The base of your directory in database #1
 suffix          "dc=example,dc=com"

 # rootdn directive for specifying a superuser on the database. This is needed
 # for syncrepl.
 # rootdn          "cn=admin,dc=example,dc=com"

 # Where the database file are physically stored for database #1
 directory       "/var/lib/ldap"

 # For the Debian package we use 2MB as default but be sure to update this
 # value if you have plenty of RAM
 dbconfig set_cachesize 0 2097152 0

 # Sven Hartge reported that he had to set this value incredibly high
 # to get slapd running at all. See http://bugs.debian.org/303057
 # for more information.

 # Number of objects that can be locked at the same time.
 dbconfig set_lk_max_objects 1500
 # Number of locks (both requested and granted)
 dbconfig set_lk_max_locks 1500
 # Number of lockers
 dbconfig set_lk_max_lockers 1500

 # Indexing options for database #1
 #index           objectClass eq

 # Save the time that the entry gets modified, for database #1
 lastmod         on

 # Where to store the replica logs for database #1
 # replogfile    /var/lib/ldap/replog

 ## <setting for replica using syncreplrefreshAndPersist; master config>
 overlay syncprov
 syncprov-checkpoint 100 10
 # syncprov-sessionlog 100

 index objectclass,entryCSN,entryUUID eq

 TLSCertificateFile      /etc/ssl/certs/cert.pem
 TLSCertificateKeyFile   /etc/ssl/certs/key.pem
 TLSCACertificateFile    /etc/ssl/certs/cacert.pem

 TLSCipherSuite HIGH:MEDIUM:+SSLv2
 ## </setting for replica using syncreplrefreshAndPersist; master config>

 # The userPassword by default can be changed
 # by the entry owning it if they are authenticated.
 # Others should not be able to see it, except the
 # admin entry below
 # These access lines apply to database #1 only

 # ldapSync can read anything
 access to *
        by dn.base="cn=ldapSync,dc=example,dc=com" read
        by * none break

 # allow readUserInfo can read users and groups
 access to dn.regex=".*ou=(people|groups),dc=example,dc=com"
        by dn.base="cn=readUserInfo,ou=admin,dc=example,dc=com" read
        by * none break

 # admin can change anything
 access to attrs=userPassword,shadowLastChange
        by dn="cn=admin,dc=example,dc=com" write
        by anonymous auth
        by self write
        by * none

 # Ensure read access to the base for things like
 # supportedSASLMechanisms.  Without this you may
 # have problems with SASL not knowing what
 # mechanisms are available and the like.
 # Note that this is covered by the 'access to *'
 # ACL below too but if you change that as people
 # are wont to do you'll still need this if you
 # want SASL (and possible other things) to work
 # happily.
 access to dn.base="" by * read

 # The admin dn has full write access, everyone else
 # can read everything.
 access to *
        by dn="cn=admin,dc=example,dc=com" write
        by * read

 # For Netscape Roaming support, each user gets a roaming
 # profile for which they have write access to
 #access to dn=".*,ou=Roaming,o=morsnet"
 #        by dn="cn=admin,dc=example,dc=com" write
 #        by dnattr=owner write

 #######################################################################
 # Specific Directives for database #2, of type 'other' (can be bdb too):
 # Database specific directives apply to this databasse until another
 # 'database' directive occurs
 #database        <other>

 # The base of your directory for database #2
 #suffix         "dc=debian,dc=org"


 slapd.conf on consumer:

 # This is the main slapd configuration file. See slapd.conf(5) for more
 # info on the configuration options.

 #######################################################################
 # Global Directives:

 # Features to permit
 #allow bind_v2

 # Schema and objectClass definitions
 include         /etc/ldap/schema/core.schema
 include         /etc/ldap/schema/cosine.schema
 include         /etc/ldap/schema/nis.schema
 include         /etc/ldap/schema/inetorgperson.schema

 ## <added for gosa minimal>
 include         /etc/ldap/schema/gosa/samba3.schema
 include         /etc/ldap/schema/gosa/trust.schema
 include         /etc/ldap/schema/gosa/gosystem.schema
 include         /etc/ldap/schema/gosa/gofon.schema
 include         /etc/ldap/schema/gosa/goto.schema
 include         /etc/ldap/schema/gosa/gosa-samba3.schema
 include         /etc/ldap/schema/gosa/gofax.schema
 include         /etc/ldap/schema/gosa/goserver.schema
 include         /etc/ldap/schema/gosa/goto-mime.schema
 ## </added for gosa minimal>

 ## <added for gosa additional plugins>
 include         /etc/ldap/schema/gosa/fai.schema
 ## </added for gosa additional plugins>


 # Where the pid file is put. The init.d script
 # will not stop the server if you change this.
 pidfile         /var/run/slapd/slapd.pid

 # List of arguments that were passed to the server
 argsfile        /var/run/slapd/slapd.args

 # Read slapd.conf(5) for possible values
 # loglevel        0
 loglevel        16384


 # Where the dynamically loaded modules are stored
 modulepath      /usr/lib/ldap
 moduleload      back_bdb
 moduleload  ppolicy.la

 # The maximum number of entries that is returned for a search operation
 sizelimit 500

 # The tool-threads parameter sets the actual amount of cpu's that is used
 # for indexing.
 tool-threads 1

 #######################################################################
 # Specific Backend Directives for bdb:
 # Backend specific directives apply to this backend until another
 # 'backend' directive occurs
 backend         bdb
 checkpoint 512 30

 #######################################################################
 # Specific Backend Directives for 'other':
 # Backend specific directives apply to this backend until another
 # 'backend' directive occurs
 #backend                <other>

 #######################################################################
 # Specific Directives for database #1, of type bdb:
 # Database specific directives apply to this databasse until another
 # 'database' directive occurs
 database        bdb

 # The base of your directory in database #1
 suffix          "dc=example,dc=com"

 # rootdn directive for specifying a superuser on the database. This is needed
 # for syncrepl.
 # rootdn          "cn=admin,dc=example,dc=com"
 rootdn          "cn=admin,dc=example,dc=com"

 # Where the database file are physically stored for database #1
 directory       "/var/lib/ldap"

 # For the Debian package we use 2MB as default but be sure to update this
 # value if you have plenty of RAM
 dbconfig set_cachesize 0 2097152 0

 # Sven Hartge reported that he had to set this value incredibly high
 # to get slapd running at all. See http://bugs.debian.org/303057
 # for more information.

 # Number of objects that can be locked at the same time.
 dbconfig set_lk_max_objects 1500
 # Number of locks (both requested and granted)
 dbconfig set_lk_max_locks 1500
 # Number of lockers
 dbconfig set_lk_max_lockers 1500

 # Indexing options for database #1
 index           objectClass eq

 # Save the time that the entry gets modified, for database #1
 lastmod         on

 ## read-only is good for slave
 readonly        on

 # Where to store the replica logs for database #1
 # replogfile    /var/lib/ldap/replog

 syncrepl rid=001
        provider=ldaps://ldap-provider.example.com:636
        type=refreshAndPersist
        retry="5 5 300 +"
        searchbase="dc=example,dc=com"
        filter="(objectClass=*)"
        scope=sub
        attrs="*"
        schemachecking=off
        bindmethod=simple
        binddn="cn=ldapSync,dc=example,dc=com"
        credentials=SECRET

 # allow readUserInfo can read users and groups
 access to dn.regex=".*ou=(people|groups),dc=example,dc=com"
        by dn.base="cn=readUserInfo,dc=example,dc=com" read
        by * none break

 # The userPassword by default can be changed
 # by the entry owning it if they are authenticated.
 # Others should not be able to see it, except the
 # admin entry below
 # These access lines apply to database #1 only
 access to attrs=userPassword,shadowLastChange
        by dn="cn=admin,dc=example,dc=com" write
        by anonymous auth
        by self write
        by * none

 # Ensure read access to the base for things like
 # supportedSASLMechanisms.  Without this you may
 # have problems with SASL not knowing what
 # mechanisms are available and the like.
 # Note that this is covered by the 'access to *'
 # ACL below too but if you change that as people
 # are wont to do you'll still need this if you
 # want SASL (and possible other things) to work
 # happily.
 access to dn.base="" by * read

 # default
 access to *
        by self read
        by users read
        by * none


-- 
--
Tony