1255290 – db2index creates index entry from deleted records

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1255290 - db2index creates index entry from deleted records

Summary: db2index creates index entry from deleted records

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	389-ds-base
Sub Component:
Version:	6.6
Hardware:	All
OS:	Linux
Priority:	high
Severity:	high
Target Milestone:	rc
Target Release:	---
Assignee:	Noriko Hosoi
QA Contact:	Viktor Ashirov
Docs Contact:	Petr Bokoc
URL:
Whiteboard:
Depends On:
Blocks:	1172231 1272422
TreeView+	depends on / blocked

Reported:	2015-08-20 08:35 UTC by Thorsten Scherf
Modified:	2020-09-13 21:30 UTC (History)
CC List:	5 users (show)
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.
Clone Of:
Environment:
Last Closed:	2016-05-10 19:20:42 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)

Links
System	ID	Priority	Status	Summary	Last Updated
Github	389ds 389-ds-base issues 1583	None	None	None	2020-09-13 21:30:16 UTC
Red Hat Knowledge Base (Solution)	1583613	None	None	None	Never
Red Hat Product Errata	RHBA-2016:0737	normal	SHIPPED_LIVE	389-ds-base bug fix and enhancement update	2016-05-10 22:29:13 UTC

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

Note You need to log in before you can comment on or make changes to this bug.