Context search timeout not considered ?

Question

Consider the following method that query twice a LDAP directory and hangs in the second query for nearly 10 minutes - I think that is TCP timeout - in the context search even if set a timeout of 5 seconds.
The connection has been closed between the first and the second search by a firewall, dueto the "Stateful inspection policy".
Have I forgotten some thing ? Or is the LDAP SPI that has a bug ?
This is the code, hope you've some advice...
Thank you
Roberto
public class MyLdap {
private LdapContext lDapCtx;
// some other declarations
public MyLdap() {}
private LdapContext createLdapContext() {
this.ldapEnv.put("java.naming.factory.initial",
"com.sun.jndi.ldap.LdapCtxFactory");
this.ldapEnv.put("java.naming.factory.url.pkgs", "com.sun.jndi.ldap");
this.ldapEnv.put("java.naming.provider.url", HOST_NAME);
this.ldapEnv.put("com.sun.jndi.ldap.connect.timeout","500");
try {
logger.fine("Creating LdapContext");
this.lDapCtx = new NGTInitialLdapContext(ldapEnv, null);
return this.lDapCtx;
catch (NamingException ex) {
this.lDapCtx = null;
logger.severe("Failed creating LdapContext");
logger.stack(ex);
return this.lDapCtx;
public NamingEnumeration search(String baseSearchStr, String filter, SearchControls constraints) throws NamingException {
NamingEnumeration results = null;
int timeout = 1000;
// timeout set constraints.setTimeLimit(timeout);
//Try search
long ini = System.currentTimeMillis();
System.out.println("Before ctx.search");
try {
results = ctx.search(baseSearchStr, filter, constraints);
System.out.println("After ctx.search secs: " + ((System.currentTimeMillis()-ini)/1000));
return results;
catch (CommunicationException e) {
System.out.println("Catch CommunicationException");
//Communication failure try ricreate context
this.recreateInitialLdapContext();
results = ctx.search(baseSearchStr, filter, constraints);
return results;
catch (NameNotFoundException ex) {
//e' un name not found, sollevo l'eccezione
System.out.println("Catch di NameNotFoundException");
throw ex;
catch (NamingException ne) {
//Tento cmq di ricostruire il contesto
System.out.println("Catch di NamingException");
this.recreateInitialLdapContext();
results = ctx.search(baseSearchStr, filter, constraints);
return results;
private void recreateInitialLdapContext() throws NamingException {
synchronized (ctx) {
System.out.println("First close context, then try recreating context");
ctx.close();
System.out.println("Context closed");
long ini = System.currentTimeMillis();
System.out.println(
"Prima di new InitialLdapContext(environment, connCtls)");
ctx = new InitialLdapContext(environment, connCtls);
System.out.println(
"Dopo di new InitialLdapContext(environment, connCtls), secondi: " +
( (System.currentTimeMillis() - ini) / 1000));
System.out.println("Succeed recreating context");
private static void search() throws Exception {
try {
logger.info("\nSearching ********************************************");
String baseSearchStr = "uid=smith, ou=UP , o=myorg";
// set the search filter in uid matching
String filter = ("uid=*");
SearchControls constraints = new SearchControls();
constraints.setSearchScope(SearchControls.OBJECT_SCOPE);
NamingEnumeration results = lDapCtx.search(baseSearchStr, filter, constraints);
while (results.hasMore()) {
SearchResult sr = (SearchResult) results.next();
Attributes att = sr.getAttributes();
NamingEnumeration idEn = att.getIDs();
while (idEn.hasMore()) {
String id = (String) idEn.next();
Attribute attrib = att.get(id);
logger.info( (String) attrib.get());
logger.info("Searching done****************************************");
catch (NamingException ex) {
logger.info("search failed");
throw ex;
private static void waitFor(int delay) {
logger.info("\nWaiting "+ delay + " seconds ****************************************");
long ini, temp;
int divisor = new Integer(1000).intValue();
ini = System.currentTimeMillis();
while ( true ) {
temp = System.currentTimeMillis() - ini;
if ( ((int) temp/divisor) == delay) {
break;
logger.info("Waiting done****************************************");
public static void main(String[] args) {
ldap ldap1 = new ldap();
try {
createLdapCtx();
search();
waitFor(new Integer(args[0]).intValue());
search();
lDapCtx.close();
catch (Exception ex) {
ex.printStackTrace();

Answer 1

Sorry, the line:
this.lDapCtx = new NGTInitialLdapContext(ldapEnv, null);
instantiate the class NGTInitialLdapContext and in the constructor there is the following line:
ctx = new InitialLdapContext(environment, connCtls);
Roberto