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Asked: 2026-06-06T21:25:26+00:00

I am using the LDAP SDK from this site: https://www.unboundid.com/products/ldap-sdk/ . I would like

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I am using the LDAP SDK from this site: https://www.unboundid.com/products/ldap-sdk/ .
I would like to make a search operation which returns a lot of entries.

According to the FAQ’s site, ( https://www.unboundid.com/products/ldap-sdk/docs/ldapsdk-faq.php#search ) I have to use a SearchResultListener implementation.

So here is what I did:

 public class UpdateThread extends Thread implements SearchResultListener {
 ...
 // create request
 final SearchRequest request = new SearchRequest(this, instance.getBaseDN(),SearchScope.SUB, filter);
 // Setting size limit of results.
 request.setSizeLimit(2000);

 ...

 // Get every result one by one.
 @Override
public void searchEntryReturned(SearchResultEntry arg0) {
    System.out.println("entry "+arg0.getDN());

}

The problem is that “searchEntryReturned” returns a maximum of 1000 results. Even if I set the size limit to “2000”.

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1 Answer

  1. Editorial Team

    Although it’s almost certainly the case that the server is enforcing the size limit of 1000 entries, there are potentially ways to get around that by issuing the request in multiple parts.

    If the server supports the use of the simple paged results control (as defined in RFC 2696 and supported in the LDAP SDK as per https://docs.ldap.com/ldap-sdk/docs/javadoc/com/unboundid/ldap/sdk/controls/SimplePagedResultsControl.html), then you can use it to iterate through the results in “pages” containing a specified number of entries.

    Alternately, the virtual list view (VLV) request control (https://www.unboundid.com/products/ldap-sdk/docs/javadoc/index.html?com/unboundid/ldap/sdk/controls/VirtualListViewRequestControl.html) could be used, but I would probably only recommend that if the server doesn’t support the simple paged results control because the VLV request control also requires that the results be sorted, and that likely either requires special configuration in the server or some pretty expensive processing in order to be able to service the request.

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