Bug 1255290

Summary: db2index creates index entry from deleted records
Product: Red Hat Enterprise Linux 6 Reporter: Thorsten Scherf <tscherf>
Component: 389-ds-baseAssignee: Noriko Hosoi <nhosoi>
Status: CLOSED ERRATA QA Contact: Viktor Ashirov <vashirov>
Severity: high Docs Contact: Petr Bokoc <pbokoc>
Priority: high    
Version: 6.6CC: jentrena, jgalipea, nkinder, pbokoc, rmeggins
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: 389-ds-base-1.2.11.15-67.el6 Doc Type: Bug Fix
Doc Text:
Tombstone entries no longer create unnecessary index entries When an entry is deleted, its indexed attribute values are also removed from each index file. However, if the entry is turned into a tombstone entry, reindexing previously added the removed attribute value back into the index. This bug has been fixed, and index files no longer contain unnecessary key-value pairs generated by tombstone entries.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2016-05-10 19:20:42 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1172231, 1272422    

Description Thorsten Scherf 2015-08-20 08:35:30 UTC 
This bug is created as a clone of upstream ticket:
https://fedorahosted.org/389/ticket/48252

    
1) Create the entry

    # ldapadd -cvvvv -D "cn=Directory Manager" -W -f /root/ldif/create-posix-user2.ldif
    ldap_initialize( <DEFAULT> )
    add objectClass:
            top
            account
            posixAccount
            shadowAccount
    add cn:
            Non Secure User
    add uid:
            user80
    add uidNumber:
            80
    add gidNumber:
            80
    add homeDirectory:
            /home/insecure
    add loginShell:
            /bin/bash
    add userpassword:
            {CLEAR}redhat
    adding new entry "uid=user80,ou=People,dc=coe,dc=muc,dc=redhat,dc=com"
    modify complete
  
2) Check the index file 
     
    # dbscan -f /var/lib/dirsrv/slapd-tscherf54/db/userRoot/gidNumber.db4 |grep "=80"
    =80                  

3) Delete the entry

    # ldapdelete -vx -D "cn=Directory Manager" -W "uid=user80,ou=People,dc=coe,dc=muc,dc=redhat,dc=com"
    ldap_initialize( <DEFAULT> )
    deleting entry "uid=user80,ou=People,dc=coe,dc=muc,dc=redhat,dc=com"

4) Verify the value from deleted entry has been removed from index
    
    # dbscan -f /var/lib/dirsrv/slapd-tscherf54/db/userRoot/gidNumber.db4 |grep "=80"
    #

5) Run db2index again 
     
    # /usr/lib64/dirsrv/slapd-tscherf54/db2index.pl  -n userRoot -D "cn=Directory Manager" -W -t gidNumber
    adding new entry "cn=db2index_2015_8_19_10_34_41, cn=index, cn=tasks, cn=config"

6) Value from removed entry shows up in index file again
     
    # dbscan -f /var/lib/dirsrv/slapd-tscherf54/db/userRoot/gidNumber.db4 |grep "=80"
    =80

7) ldapsearch fails to find the removed entry and there is also nothing related in the error log:

# ldapsearch -x  gidNumber=80
# extended LDIF
#
# LDAPv3
# base <dc=coe,dc=muc,dc=redhat,dc=com> (default) with scope subtree
# filter: gidNumber=80
# requesting: ALL
#

# search result
search: 2
result: 0 Success

# numResponses: 1
Comment 2 Viktor Ashirov 2016-03-31 14:29:49 UTC 
Build tested:
389-ds-base-1.2.11.15-74.el6.x86_64

# ldapadd -D "cn=Directory Manager" -w Secret123
dn: uid=user80,ou=People,dc=example,dc=com
objectClass: top
objectClass: account
objectClass: posixAccount
objectClass: shadowAccount
cn: Non Secure User
uid: user80
gidNumber: 80
uidNumber: 80
homeDirectory: /home/insecure
loginShell: /bin/bash
userPassword: {CLEAR}redhat


adding new entry "uid=user80,ou=People,dc=example,dc=com"

# dbscan -f /var/lib/dirsrv/slapd-rhel6ds/db/userRoot/gidnumber.db4 |grep "=80"
=80

# ldapdelete -D "cn=Directory Manager" -w Secret123 "uid=user80,ou=People,dc=example,dc=com"

after some time entry is removed from the index:
# dbscan -f /var/lib/dirsrv/slapd-rhel6ds/db/userRoot/gidnumber.db4 |grep "=80" -c
0

# /usr/lib64/dirsrv/slapd-rhel6ds/db2index.pl -n userRoot -D "cn=Directory Manager" -w Secret123 -t gidNumber 
adding new entry "cn=db2index_2016_3_31_16_28_53, cn=index, cn=tasks, cn=config"

# dbscan -f /var/lib/dirsrv/slapd-rhel6ds/db/userRoot/gidnumber.db4 |grep "=80" -c
0

Value from the removed entry didn't reappear, marking as VERIFIED.
Comment 4 errata-xmlrpc 2016-05-10 19:20:42 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0737.html