You’re encountering that exception most likely because the server you’re communicating with has more results than can be returned by a single request. In order to get around this you need to use paged results which can be done by using SimplePagedResultsControl.
Here’s a Python3 implementation that I came up with after heavily editing what I found here and in the official documentation. At the time of writing this it works with the pip3 package python-ldap version 3.2.0.
def get_list_of_ldap_users():
hostname = "<domain>:389"
username = "username_here"
password = "password_here"
base = "ou=People,dc=tnc,dc=org"
print(f"Connecting to the LDAP server at '{hostname}'...")
connect = ldap.initialize(f"ldap://{hostname}")
connect.set_option(ldap.OPT_REFERRALS, 0)
connect.simple_bind_s(username, password)
search_flt = "(objectClass=*)"
page_size = 500 # how many users to search for in each page, this depends on the server maximum setting (default highest value is 1000)
searchreq_attrlist=["sn"] # change these to the attributes you care about
req_ctrl = SimplePagedResultsControl(criticality=True, size=page_size, cookie='')
msgid = connect.search_ext(base=base, scope=ldap.SCOPE_SUBTREE, filterstr=search_flt, attrlist=searchreq_attrlist, serverctrls=[req_ctrl])
total_results = []
pages = 0
while True: # loop over all of the pages using the same cookie, otherwise the search will fail
pages += 1
rtype, rdata, rmsgid, serverctrls = connect.result3(msgid)
for user in rdata:
total_results.append(user)
pctrls = [c for c in serverctrls if c.controlType == SimplePagedResultsControl.controlType]
if pctrls:
if pctrls[0].cookie: # Copy cookie from response control to request control
req_ctrl.cookie = pctrls[0].cookie
msgid = connect.search_ext(base=base, scope=ldap.SCOPE_SUBTREE, filterstr=search_flt, attrlist=searchreq_attrlist, serverctrls=[req_ctrl])
else:
break
else:
break
return total_results
This will return a list of all users but you can edit it as required to return what you want without hitting the SIZELIMIT_EXCEEDED issue 
You’re encountering that exception most likely because the server you’re communicating with has more results than can be returned by a single request. In order to get around this you need to use paged results which can be done by using SimplePagedResultsControl.
Here’s a Python3 implementation that I came up with after heavily editing what I found here and in the official documentation. At the time of writing this it works with the pip3 package python-ldap version 3.2.0.
def get_list_of_ldap_users():
hostname = "<domain>:389"
username = "username_here"
password = "password_here"
base = "ou=People,dc=tnc,dc=org"
print(f"Connecting to the LDAP server at '{hostname}'...")
connect = ldap.initialize(f"ldap://{hostname}")
connect.set_option(ldap.OPT_REFERRALS, 0)
connect.simple_bind_s(username, password)
search_flt = "(objectClass=*)"
page_size = 500 # how many users to search for in each page, this depends on the server maximum setting (default highest value is 1000)
searchreq_attrlist=["sn"] # change these to the attributes you care about
req_ctrl = SimplePagedResultsControl(criticality=True, size=page_size, cookie='')
msgid = connect.search_ext(base=base, scope=ldap.SCOPE_SUBTREE, filterstr=search_flt, attrlist=searchreq_attrlist, serverctrls=[req_ctrl])
total_results = []
pages = 0
while True: # loop over all of the pages using the same cookie, otherwise the search will fail
pages += 1
rtype, rdata, rmsgid, serverctrls = connect.result3(msgid)
for user in rdata:
total_results.append(user)
pctrls = [c for c in serverctrls if c.controlType == SimplePagedResultsControl.controlType]
if pctrls:
if pctrls[0].cookie: # Copy cookie from response control to request control
req_ctrl.cookie = pctrls[0].cookie
msgid = connect.search_ext(base=base, scope=ldap.SCOPE_SUBTREE, filterstr=search_flt, attrlist=searchreq_attrlist, serverctrls=[req_ctrl])
else:
break
else:
break
return total_results
This will return a list of all users but you can edit it as required to return what you want without hitting the SIZELIMIT_EXCEEDED issue
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Closed
eirslett opened this issue
Mar 20, 2018
· 7 comments
Comments
Feature Request:
Setting size limit for LDAP queries
Environment:
Linux, Vault v0.9.5
Vault Config File:
vault write auth/ldap/config url="ldaps://ldap.example.com:636" userdn="OU=Users,OU=Org,OU=BusinessUnits,DC=example,DC=com" groupdn="OU=AccountGroups,OU=Groups,OU=Org,OU=BusinessUnits,DC=example,DC=com" groupfilter="(&(objectClass=group))" groupattr="memberOf" upndomain="example.com" insecure_tls=false starttls=false vault write auth/ldap/groups/developers policies=dev
Startup Log Output:
Expected Behavior:
vault login -method=ldap username=<user> with password, should be able to login
Actual Behavior:
Error message: Result Code 4 «Size Limit Exceeded» from the LDAP server.
Important Factoids:
The LDAP environment has very many entries.
Is it possible to set a parameter to increase the limit of groups to return?
What parameter would that be? Is it something standardized across ldap servers?
That’s a very long article, what parameter are you referring to?
jefferai
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jefferai
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Even after I set SizeLimit parameter to math.MaxInt64 or math.MaxInt32 or to any large value, it doesn’t seem to work. I still get Code 4 "Size Limit Exceeded". What am I missing?
Even after I set
SizeLimitparameter tomath.MaxInt64ormath.MaxInt32or to any large value, it doesn’t seem to work. I still getCode 4 "Size Limit Exceeded". What am I missing?
It was a pagination problem and it’s working fine now.
markelog
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Active Directory does indeed have a limitation with 1000 results per search (default of course). However, that limitation can be workaround with the pagination search feature, meaning `pagination` number is how many times LDAP compatible server will be requested by the client with specified amount of users (like 1000). That feature already embeded with LDAP compatible client (including our `go-ldap`). But slapd server has by default stricter settings. First, limitation is not 1000 but 500, second, pagination workaround presumably (information about it a bit scarce and I still not sure on some of the details from my own testing) cannot be workaround with pagination feature. See https://www.openldap.org/doc/admin24/limits.html https://serverfault.com/questions/328671/paging-using-ldapsearch hashicorp/vault#4162 - not sure why they were hitting the limit in the first place, since `go-ldap` doesn't have one by default. But, given all that, for me `ldapsearch` command with same request as with `go-ldap` still returns more then 500 results, it can even return as much as 10500 items (probably more). So either there is some differences with implementation of the LDAP search between `go-ldap` module and `ldapsearch` or I am missing a step :/. In the wild (see serverfault link), apparently, people still hitting that limitation even with `ldapsearch`, so it still seems to be an issue. But, nevertheless, I'm still confused by this incoherence. To workaround it, I divide the request by no more then 500 items per search
markelog
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* LDAP: Divide the requests Active Directory does indeed have a limitation with 1000 results per search (default of course). However, that limitation can be workaround with the pagination search feature, meaning `pagination` number is how many times LDAP compatible server will be requested by the client with specified amount of users (like 1000). That feature already embeded with LDAP compatible client (including our `go-ldap`). But slapd server has by default stricter settings. First, limitation is not 1000 but 500, second, pagination workaround presumably (information about it a bit scarce and I still not sure on some of the details from my own testing) cannot be workaround with pagination feature. See https://www.openldap.org/doc/admin24/limits.html https://serverfault.com/questions/328671/paging-using-ldapsearch hashicorp/vault#4162 - not sure why they were hitting the limit in the first place, since `go-ldap` doesn't have one by default. But, given all that, for me `ldapsearch` command with same request as with `go-ldap` still returns more then 500 results, it can even return as much as 10500 items (probably more). So either there is some differences with implementation of the LDAP search between `go-ldap` module and `ldapsearch` or I am missing a step :/. In the wild (see serverfault link), apparently, people still hitting that limitation even with `ldapsearch`, so it still seems to be an issue. But, nevertheless, I'm still confused by this incoherence. To workaround it, I divide the request by no more then 500 items per search
@jefferai This is still a problem in 1.2.3. Vault needs to search with pagination and set the page size to a high value as well.
This search appears to need updated: https://github.com/hashicorp/vault/blob/master/sdk/helper/ldaputil/client.go#L214-L222
Should use something like this:
result, err := conn.SearchWithPaging(&ldap.SearchRequest{
BaseDN: cfg.GroupDN,
Scope: ldap.ScopeWholeSubtree,
Filter: renderedQuery.String(),
Attributes: []string{
cfg.GroupAttr,
},
SizeLimit: math.MaxInt32,
}, math.MaxInt32)
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Instead of 7.2, LDAP pagination is supported in 7.3
https://docs.splunk.com/Documentation/Splunk/7.3.0/Admin/Authenticationconf
pagelimit =
* OPTIONAL
* The maximum number of entries to return in each page.
* Enables result sets that exceed the maximum number of entries defined for the
LDAP server.
* If set to -1, ldap pagination is off.
* IMPORTANT: The maximum number of entries a page returns is subject to
the maximum page size limit of the LDAP server. For example: If you set ‘pagelimit =
5000′ and the server limit is 1000, you cannot receive more than 1000 entries in
a page.
* Default: -1
Splunk 7.3 also supports LDAP Range Retrieval ( in case there are too many users in a group).
enableRangeRetrieval =
* OPTIONAL
* The maximum number of values that can be retrieved from one attribute in a
single LDAP search request is determined by the LDAP server. If the number of
users in a group exceeds the LDAP server limit, enabling this setting fetches all
users by using the «range retrieval» mechanism.
* Enables result sets for a given attribute that exceed the maximum number of
values defined for the LDAP server.
* If set to false, ldap range retrieval is off.
* Default: false
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Instead of 7.2, LDAP pagination is supported in 7.3
https://docs.splunk.com/Documentation/Splunk/7.3.0/Admin/Authenticationconf
pagelimit =
* OPTIONAL
* The maximum number of entries to return in each page.
* Enables result sets that exceed the maximum number of entries defined for the
LDAP server.
* If set to -1, ldap pagination is off.
* IMPORTANT: The maximum number of entries a page returns is subject to
the maximum page size limit of the LDAP server. For example: If you set ‘pagelimit =
5000′ and the server limit is 1000, you cannot receive more than 1000 entries in
a page.
* Default: -1
Splunk 7.3 also supports LDAP Range Retrieval ( in case there are too many users in a group).
enableRangeRetrieval =
* OPTIONAL
* The maximum number of values that can be retrieved from one attribute in a
single LDAP search request is determined by the LDAP server. If the number of
users in a group exceeds the LDAP server limit, enabling this setting fetches all
users by using the «range retrieval» mechanism.
* Enables result sets for a given attribute that exceed the maximum number of
values defined for the LDAP server.
* If set to false, ldap range retrieval is off.
* Default: false
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I have the same issue «Warning: LDAP server size limit exceeded» but I can see more than 1000 groups in Splunk(near 1800) and users can Log in.
My LDAP server limit is 5000. I have no Idea where to find solution.
May be this message could be ignore as it is not error but warning.
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I received this same error on 4.3 I went into Manager > Authentication Method > Configure Splunk to use LDAP and map groups >
On the CLI, you could just edit /etc/system/local/authentication.conf as follows:
OLD: sizelimit = 1000
New: sizelimit = 10000
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Size Limit Exceeded is an LDAP server error indicating that the search request was unable to return all entries due to a limit. The problem encountered is that the users or groups you are looking for may have been in the 1001+ entries and are not being returned.
In AD, the default size limit is typically 1000 entries. The LDAP server error is usually followed by an error indicating the number of entries returned which is a few entries less than the actual size limit. There is nothing you can do to change this limit unless you are the LDAP server administrator.
In Splunk, you can use filters to reduce the number of LDAP entries returned so that you do not hit this limit.
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I downvoted this post because instead of 7.2, ldap pagination is supported in 7.3
https://docs.splunk.com/documentation/splunk/7.3.0/admin/authenticationconf
pagelimit =
* optional
* the maximum number of entries to return in each page.
* enables result sets that exceed the maximum number of entries defined for the
ldap server.
* if set to -1, ldap pagination is off.
* important: the maximum number of entries a page returns is subject to
the maximum page size limit of the ldap server. for example: if you set ‘pagelimit =
5000′ and the server limit is 1000, you cannot receive more than 1000 entries in
a page.
* default: -1
Splunk 7.3 also supports ldap range retrieval ( in case there are too many users in a group).
enablerangeretrieval =
* optional
* the maximum number of values that can be retrieved from one attribute in a
single ldap search request is determined by the ldap server. if the number of
users in a group exceeds the ldap server limit, enabling this setting fetches all
users by using the «range retrieval» mechanism.
* enables result sets for a given attribute that exceed the maximum number of
values defined for the ldap server.
* if set to false, ldap range retrieval is off.
* default: false
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Question
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I’m using a script that should pull right at 1400 records from our LDAP ( i double checked by running the same filter in Apache Directory Studio and the query ran successfully). The output will be used as a SSIS SQL source. I know our page limit
on the LDAP is set at 2000 however every time we run the script below we get the following error message «The size limit was exceeded». Can anyone see what can be modified in our script to overcome this error message? I’ve tried setting
«request.SizeLimit = Integer.MaxValue» and have tried «request.SizeLimit = 2000» just after however the same error message of «The size limit was exceeded» persists. Any help
would be greatly appreciated.Imports System Imports System.Data Imports System.Math Imports System.DirectoryServices.Protocols Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper Imports Microsoft.SqlServer.Dts.Runtime.Wrapper <Microsoft.SqlServer.Dts.Pipeline.SSISScriptComponentEntryPointAttribute()> _ <CLSCompliant(False)> _ Public Class ScriptMain Inherits UserComponent Public Overrides Sub CreateNewOutputRows() 'Set ldap server string and port number that will be bound against Dim con As New LdapConnection(New LdapDirectoryIdentifier("ldap.company.com:636")) 'Set the username and password of the service account used to bind against ldap.company.com Dim credential As New System.Net.NetworkCredential("USERNAME", "PASSWORD") 'Enable SSL ring bind to ldap.company.com con.SessionOptions.SecureSocketLayer = True 'Set authentication method used ring bind to ldap.company.com con.AuthType = AuthType.Basic 'Pass along the credentials established earlier con.Credential = credential Using con 'Set what attributes to pull from ldap.company.com Dim attributesToReturn As String() = New String() {"uid", "companyID", "givenName", "Nickname", "MiddleName1", "sn", "generationQualifier", "Degree", "displayName", "mail", "PSCareerC1", "PSCareerDescC1", "PSProgC1", "PSExpTermC1", "Affiliation", "PrimaryAffiliation", "PrincipalName", "telephoneNumber", "OrgUnit", "title"} 'Set the search scope and filter for the query against ldap.company.com Dim request As New SearchRequest("OU=people,DC=company,DC=com", "(objectClass=person)", SearchScope.Subtree, attributesToReturn) Dim response As SearchResponse = DirectCast(con.SendRequest(request, New TimeSpan(1, 0, 0, 0, 0)), SearchResponse) 'Send ldap bind request to ldap.company.com using the paramaters set above con.Bind() If response.Entries.Count > 0 Then Dim counter As Integer = 0 'Enumerate through each entry, pulling each of the attributes requested For Each entry As SearchResultEntry In response.Entries OutputBuffer.AddRow() Dim Affiliations(5) As String Dim Title(5) As String OutputBuffer.DN = entry.DistinguishedName.ToString() Dim attributes As SearchResultAttributeCollection = entry.Attributes For Each attribute As DirectoryAttribute In attributes.Values For i As Integer = 0 To attribute.Count - 1 If TypeOf attribute(i) Is String Then If attribute.Name = "uid" Then 'Set NetID to the uid attribute value from ldap.company.com OutputBuffer.NetID = attribute(i).ToString() ElseIf attribute.Name = "givenName" Then 'Set FirstName to the givenName attribute value from ldap.company.com OutputBuffer.FirstName = attribute(i).ToString() ElseIf attribute.Name = "Nickname" Then 'Set Nickname to the Nickname attribute value from ldap.company.com OutputBuffer.Nickname = attribute(i).ToString() ElseIf attribute.Name = "MiddleName1" Then 'Set MiddleName to the MiddleName1 attribute value from ldap.company.com OutputBuffer.MiddleName = attribute(i).ToString() ElseIf attribute.Name = "sn" Then 'Set LastName to the sn attribute value from ldap.company.com OutputBuffer.LastName = attribute(i).ToString() ElseIf attribute.Name = "generationQualifier" Then 'Set Suffix to the generationQualifier attribute value from ldap.company.com OutputBuffer.Suffix = attribute(i).ToString() ElseIf attribute.Name = "Degree" Then 'Set Degree to the Degree attribute value from ldap.company.com OutputBuffer.Degree = attribute(i).ToString() ElseIf attribute.Name = "displayName" Then 'Set DisplayName to the displayName attribute value from ldap.company.com OutputBuffer.DisplayName = attribute(i).ToString() ElseIf attribute.Name = "companyID" Then 'Set UniqueID to the companyID attribute value from ldap.company.com OutputBuffer.UniqueID = attribute(i).ToString() ElseIf attribute.Name = "mail" Then 'Set Email to the mail attribute value from ldap.company.com OutputBuffer.Email = attribute(i).ToString() ElseIf attribute.Name = "title" Then OutputBuffer.Title = attribute(i).ToString() If String.IsNullOrEmpty(Title(0)) Then Title(0) = attribute(i).ToString() OutputBuffer.Title = Title(0) ElseIf String.IsNullOrEmpty(Title(1)) Then Title(1) = attribute(i).ToString() OutputBuffer.Title = Title(0) + ", " + Title(1) ElseIf String.IsNullOrEmpty(Title(2)) Then Title(2) = attribute(i).ToString() OutputBuffer.Title = Title(0) + ", " + Title(1) + ", " + Title(2) ElseIf String.IsNullOrEmpty(Title(3)) Then Title(3) = attribute(i).ToString() OutputBuffer.Title = Title(0) + ", " + Title(1) + ", " + Title(2) + ", " + Title(3) ElseIf String.IsNullOrEmpty(Title(4)) Then Title(4) = attribute(i).ToString() OutputBuffer.Title = Title(0) + ", " + Title(1) + ", " + Title(2) + ", " + Title(3) + ", " + Title(4) End If ElseIf attribute.Name = "telephoneNumber" Then 'Set Telephone to the telephoneNumber attribute value from ldap.company.com OutputBuffer.Telephone = attribute(i).ToString() ElseIf attribute.Name = "PSCareerC1" Then 'Set PSCareerC1 to the PSCareerC1 attribute value from ldap.company.com OutputBuffer.PSCareerC1 = attribute(i).ToString() ElseIf attribute.Name = "PSCareerDescC1" Then 'Set PSCareerDescC1 to the PSCareerDescC1 attribute value from ldap.company.com OutputBuffer.PSCareerDescC1 = attribute(i).ToString() ElseIf attribute.Name = "PSProgC1" Then 'Set PSProgC1 to the PSProgC1 attribute value from ldap.company.com OutputBuffer.PSProgC1 = attribute(i).ToString() ElseIf attribute.Name = "PSExpTermC1" Then 'Set PSExpTermC1 to the PSExpTermC1 attribute value from ldap.company.com OutputBuffer.PSExpTermC1 = attribute(i).ToString() ElseIf attribute.Name = "PrimaryAffiliation" Then 'Set PrimaryAffiliation to the PrimaryAffiliation attribute value from ldap.company.com OutputBuffer.PrimaryAffiliation = attribute(i).ToString() ElseIf attribute.Name = "PrincipalName" Then 'Set PrincipalName to the PrincipalName attribute value from ldap.company.com OutputBuffer.PrincipalName = attribute(i).ToString() ElseIf attribute.Name = "OrgUnit" Then 'Set OrgUnit to the OrgUnit attribute value from ldap.company.com OutputBuffer.OrgUnit = attribute(i).ToString() ElseIf attribute.Name = "Affiliation" Then If String.IsNullOrEmpty(Affiliations(0)) Then Affiliations(0) = attribute(i).ToString() OutputBuffer.Affiliations = Affiliations(0) ElseIf String.IsNullOrEmpty(Affiliations(1)) Then Affiliations(1) = attribute(i).ToString() OutputBuffer.Affiliations = Affiliations(0) + ", " + Affiliations(1) ElseIf String.IsNullOrEmpty(Affiliations(2)) Then Affiliations(2) = attribute(i).ToString() OutputBuffer.Affiliations = Affiliations(0) + ", " + Affiliations(1) + ", " + Affiliations(2) ElseIf String.IsNullOrEmpty(Affiliations(3)) Then Affiliations(3) = attribute(i).ToString() OutputBuffer.Affiliations = Affiliations(0) + ", " + Affiliations(1) + ", " + Affiliations(2) + ", " + Affiliations(3) ElseIf String.IsNullOrEmpty(Affiliations(4)) Then Affiliations(4) = attribute(i).ToString() OutputBuffer.Affiliations = Affiliations(0) + ", " + Affiliations(1) + ", " + Affiliations(2) + ", " + Affiliations(3) + ", " + Affiliations(4) End If End If End If Next Next counter = counter + 1 Next End If End Using End Sub End Class
Answers
-
Hi RJ454ME,
According to your description and code, please try to set the SizeLimit property of the DirectorySearcher to something less than 1000 (or less than the expected number of entries returned) to try to determine what the limit is. There are limitations imposed
by the Administrator of your AD for things like returning nodes. The default for this class is 1000, but that set on your domain may be less.For «The size limit was exceeded», i think that perhaps someone have changed your AD:s MaxPageSize, or
the browser have paging when you do your Apache search.You can also try to use Paged search, please check below:
#LDAP Paged Search Technology Sample
http://msdn.microsoft.com/en-us/library/tehcbaa3(v=vs.90).aspx
Franklin Chen
MSDN Community Support | Feedback to us
Develop and promote your apps in Windows Store
Please remember to mark the replies as answers if they help and unmark them if they provide no help.-
Marked as answer by
Sunday, August 18, 2013 5:53 AM
-
Marked as answer by
-
Hi RJ454ME,
For the sample of LDAP PagedSearch, you can download from my SkyDrive, it has VB.net Version:
http://sdrv.ms/14t39r0
Getting more help, please check the above reference(#LDAP Paged Search Technology Sample)
Franklin Chen
MSDN Community Support | Feedback to us
Develop and promote your apps in Windows Store
Please remember to mark the replies as answers if they help and unmark them if they provide no help.-
Edited by
Franklin ChenMicrosoft employee
Tuesday, August 13, 2013 12:40 PM
fix -
Marked as answer by
Franklin ChenMicrosoft employee
Sunday, August 18, 2013 5:53 AM
-
Edited by
Содержание
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- Symptoms
- Cause
- Resolution
- What if these don’t work?
- LDAP — javax.naming.SizeLimitExceededException
- Resolution
- OVD Search Gives Error «LDAP: error code 4 — Sizelimit Exceeded» (Doc ID 1301423.1)
- Applies to:
- Symptoms
- Cause
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- javax.naming.SizeLimitExceededException: [LDAP: error code 4 — Sizelimit Exceeded]; #38
- Comments
- Error [LDAP Error Code 4 — Sizelimit Exceeded] Received in OID 10g Oracle Directory Manager (ODM / oidadmin) (Doc ID 467570.1)
- Applies to:
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Service management and customer support
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Manage any business project
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LDAP Search Fails With Error «error code 4 — Sizelimit Exceeded»
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Still need help?
The Atlassian Community is here for you.
Symptoms
There are two different cases where this issue can occur;
Symptom 1: Users aren’t able to login.
When integrated with SunONE LDAP Server, the following error is logged in atlassian-crowd.log file;
Symptom 2: Testing a Directory Connector fails!
Performing a test search in the Directory Connector Configuration tab fails with similar error.
Cause
Cause for Symptom 1 .
SunONE doesn’t support data paging
Cause for Symptom 2 .
This is a known bug which is fixed in Crowd 2.0.3. The fix works for Connector Directories only. The Delegated Directories may present the problem but it would not impact the normal directory functioning.
Resolution
Resolution for Cause 1 .
Set LDAP property search-size-limit to a higher value.
The value (the default being 2000) depends on the maximum number of elements (users, groups and roles) your Crowd server will have to fetch at once from the LDAP server.
Resolution for Cause 2 .
The bug is fixed in Crowd 2.0.3, if you are affected by this issue please upgrade to the latest Crowd version.
What if these don’t work?
Please have a look over this KB Unable to Log In with Confluence 3.5 or Later Due to ‘LDAP error code 4 — Sizelimit Exceeded’ which involves turning off paged results.
Источник
LDAP — javax.naming.SizeLimitExceededException
Your Elements Connect fields configured with an LDAP datasource fail with a similar error:
This error is returned by your LDAP server, that means the problem seems to be outside Jira actually. LDAP error codes are always explicit, in your case, here is the meaning:
LDAP: error code 4 — Sizelimit Exceeded:
LDAP Server settings. There isn’t a universal way of solving this problem, for it depends on a number of reasons: what kind of server you are working with, whom the server belongs to, whether or not you enjoy administrator rights and physical access to the server. If your server is absent in the list of solutions recommended for well-known servers, we suggest you ask your system administrator or consult the server documentation.
Workaround for well-known servers:
Microsoft Active Directory. By default, Microsoft Active Directory which is a part of Windows 2000 Server, allows fetching only 1000 entries per one search request. In terms of this system such a restriction is called MaxPageSize. This parameter can be changed using the ntdsutil.exe file which is a command line tool supplied with Windows 2000 Server. Another way to change this parameter is to edit it directly inside the CN=Default Query Policy, CN=Query-Policies, CN=Directory Service, CN=Windows NT, CN=Services, CN=Configuration, DC=YOUR_COMPANY, DC=YOUR_COMPANY_TLD entry by using LDAP Administrator. In both cases you must have administrator rights.
OpenLDAP. The time limit for the OpenLDAP server can be changed in the config file (which can usually be found at /etc/openldap/slapd.conf). The parameter is called sizelimit. For more information please consult the slapd.conf Manual page or the OpenLDAP documentation.
Resolution
This issue originates from the LDAP server, please contact your LDAP administrator.
Источник
OVD Search Gives Error «LDAP: error code 4 — Sizelimit Exceeded» (Doc ID 1301423.1)
Last updated on OCTOBER 02, 2019
Applies to:
Symptoms
Gets the following error while doing a search against OVD
LDAP: error code 4 — Sizelimit Exceeded
Error doesn’t occur if the search is executed as the Admin user «cn=orcladmin»
With «Authenticated User Search» parameter set to high value (example: 65,000)
ldapsearch queries that should return all entries (example: 20,000) is resulting with only a small number (example: 9000) and a sizelimit exceeded error.
Example Search and full output:
ldapsearch —h -p
-D «cn=orcladmin» -w
-b «ou= ,ou=Users,dc= ,dc=com» -L -s sub «(objectclass=inetOrgPerson)» uid
ldap_search: Sizelimit exceeded
ldap_search: additional info: [LDAP: error code 4 — Sizelimit Exceeded]
Example error from access.log:
[2012-02-27T14:09:00.289-05:00] [octetstring] [NOTIFICATION] [OVD-20044] [com.octetstring.accesslog] [tid: xx] [ecid: ] conn=1 op=1 RESULT err=4 tag=0 nentries=9,000 etime=27,101 dbtime=0 mem=178,862,960/259,719,168
Notice the err=4
Cause
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Источник
javax.naming.SizeLimitExceededException: [LDAP: error code 4 — Sizelimit Exceeded]; #38
why set sizelimit to 1 ?
The text was updated successfully, but these errors were encountered:
Ideally — when you’re looking up a user in an LDAP tree, you should find a unique user matching the criteria specified. Otherwise, it’s ambiguous which user is attempting to login.
Can you explain why you think the sizelimit needs to be something else?
sorry for that, that my mistake, i think i found a bug , i have two username ,one is puqiaoming, this username can login, another is qiaoming ,when i login with qiaoming have error below:
Thanks for the bug report. @maheshp @bdpiparva — can one of you look into this?
@inits — Please can you provide what value you have used for user UserLoginFilter in your auth config?
is default below
(|(sAMAccountName= )(uid= )(cn= )(mail= )(otherMailbox= ))
@bdpiparva and @maheshp — should we use * around the filters (|(sAMAccountName=*<0>*)(uid=*<0>*)(cn=*<0>*)(mail=*<0>*)(otherMailbox=*<0>*)) . I’d think it should simply be (|(sAMAccountName=<0>)(uid=<0>)(cn=<0>)(mail=<0>)(otherMailbox=<0>))
@ketan — No we don’t need * around filters.
@inits — Please can you change it to (|(sAMAccountName=<0>)(uid=<0>)(cn=<0>)(mail=<0>)(otherMailbox=<0>)) . It should resolve your issue.
@bdpiparva — are you suggesting that we fix the default value in the plugin?
Yes, I am still looking for a way to validate username after searching user from LDAP tree.
But that filter is passed to the LDAP server itself, right? As long as there is no *<0>* , we shouldn’t need to validate anything. No?
@arvindsv —Yes, you are right but UserLoginFilter is the configurable field. At least validation to check filter contains * need to be there. right?
@ketan — #38 (comment) there is no default value for UserLoginFilter . Ignore what I said earlier.
@ketan — #38 (comment) there is no default value for UserLoginFilter. Ignore what I said earlier.
Is this just a documentation/tooltip/help-text fix then?
@arvindsv —Yes, you are right but UserLoginFilter is the configurable field. At least validation to check filter contains * need to be there. right?
I don’t know how you’d do that — unless you parse out the filter text into a syntax tree like thing. Is that even possible with the current implementation?
Perhaps this can be achieved by a simple warning in the plugin config that detects a *<0>* pattern?
Yes, that is what I am planning.
- Tooltip on the configuration page
- Detect if filter contains any *<0>* , * <0>, or <0>* then show error.
I wouldn’t show an error. Since it is user-configurable, we should allow them to configure it however they want. We can warn (or show a tooltip), but it should not stop them from setting that value. For all practical purposes, it should be opaque to GoCD.
The documentation definitely needs to change.
In places such as this as well.
@bdpiparva and I talked. Here are some notes:
In UserSearchFilter *<0>* is appropriate. This is so that «Add user» functionality and others such as that will work, and find users by partial name.
In UserLoginFilter *<0>* is not appropriate. It has the potential of finding mutiple users for a given username, when logging in. This is what is happening in the original exception.
None of our documentation needs to change, because we do have it correct. We will consider a warning in the tooltip message of UserLoginFilter warning against using *<0>* . Something like: It is not recommended to have *<0>* in this field as it can match other users.
We were able to reproduce this in a test and we will be showing a better exception message. In essence, we will be differentiating between a hard limit of 1 match during login and a soft limit of 10 or 15 matches for «Add user» functionality, which should take care of this problem. In one LDAP search base, if a user, while logging in, matches multiple LDAP records, then an error will be logged.
Источник
Error [LDAP Error Code 4 — Sizelimit Exceeded] Received in OID 10g Oracle Directory Manager (ODM / oidadmin) (Doc ID 467570.1)
Last updated on AUGUST 26, 2022
Applies to:
Symptoms
Error «[LDAP: error code 4 — Sizelimit Exceeded]» is received in Oracle Directory Manager after an OID entry has been expanded to see the subentries.
Following is the complete message received.
Incomplete Failed.
Host=’hostname’
Details:
[LDAP: error code 4 — Sizelimit Exceeded]
Cause
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