[fw-general] Zend_Ldap bind errors

[Henry Umansky]

Hello all,
Not sure how to troubleshoot this problem, perhaps you can offer me some 
assistance. I have a page that does a simple LDAP lookup using Zend_Ldap and ZF 
v1.9.1. When I have restart the server, initially it works, but after about 30 
minutes or so, it starts failing about 1 in every 3-5 requests. Nothing in the 
error log and the exception just says:

Message: LDAP error: 0x51 (Can't contact LDAP server): 
ldaps://ldap.sample.com:636

The LDAP is a stable, busy service with no other applications having problems, 
only my ZF application. Any thoughts on how I can troubleshoot this issue? Here 
is my code:

public function search() {
  $ldap = $this->getResource();
  $filter = $this->getFilter();

  $ldap->bind();
  $results = $ldap->search ( $filter, null,  Zend_Ldap::SEARCH_SCOPE_SUB, 
array(), 'sn');

  return $results;
}

Any thoughts or recommendations?

Thank you,
Henry