[ldap-sdk-discuss] LDAPConnection pool and paged search

[Sergey K. <skl...@op...>]

Hello,
Can I use LDAPConnectionPool for paged search (or other search requests that uses cookie returned from the LDAP server)?
It works for me most of the time, but once in a while I get error

LDAPSearchException(resultCode=12 (unavailable critical extension), numEntries=0, numReferences=0, errorMessage='00000057: LdapErr: DSID-0C090797, comment: Error processing control, data 0, v23f0 ')
                at com.unboundid.ldap.sdk.LDAPConnection.search(LDAPConnection.java:3658)
                at com.unboundid.ldap.sdk.AbstractConnectionPool.search(AbstractConnectionPool.java:2020)

I believe it happens, because new connection is used with cookie returned from previous call. I can see that new port is used in search request.

My code is something like this:

private LDAPConnection createNewLDAPConnection(String host, int port, boolean useSSL) throws LDAPException {
    LDAPConnectionOptions ldapConnectionOptions = new LDAPConnectionOptions();

    ldapConnectionOptions.setAutoReconnect(true);
    ldapConnectionOptions.setUseKeepAlive(true);
    ldapConnectionOptions.setUseTCPNoDelay(true);
    ldapConnectionOptions.setUseSynchronousMode(true);
    ldapConnectionOptions.setFollowReferrals(false);
    ldapConnectionOptions.setResponseTimeoutMillis(0);


    SocketFactory sf = null;
    LDAPConnection ldapConnection = new LDAPConnection(sf, ldapConnectionOptions, host, port);
    if (!StringsUtils.isBlank(m_bindUser) && !StringsUtils.isBlank(m_bindPassword)) {
        ldapConnection.bind(m_bindUser, m_bindPassword);
    }
    return ldapConnection;
}


LDAPConnection ldapConnection = createNewLDAPConnection(m_prevConnectedUrl);

m_connectionPool = new LDAPConnectionPool(ldapConnection, 3);



......



// do search. Called while getting back results with PagedControl



protected SearchResult doSearch(String parentPrefix, SearchRequest searchRequest, Control[] controls) {



.....

if (controls != null) {
    searchRequest.setControls(controls);  // Paged control with cookie from previous response
}



searchResult = m_connectionPool.search(searchRequest);



}





I can see that most of the time

searchResult = m_connectionPool.search(searchRequest);

succeeds, but at some moment fails with



LDAPSearchException(resultCode=12 (unavailable critical extension), numEntries=0, numReferences=0, errorMessage='00000057: LdapErr: DSID-0C090797, comment: Error processing control, data 0, v23f0 ')

         at com.unboundid.ldap.sdk.LDAPConnection.search(LDAPConnection.java:3658)

         at com.unboundid.ldap.sdk.AbstractConnectionPool.search(AbstractConnectionPool.java:2020)



Looks like it fails, because call comes from different port (another connection)

Am I right?

What would you suggest?

Should I use for paged searches (and other searches that use cookies) dedicated connection? Something like

LDAPConnection connection = m_connectionPool.getConnection();



While (have results) {

         connection.search(); // with updated cookie in paged search contro

}



Should I release connection?





Thanks in advance,

Sergey