RFR: [PATCH] 8176553 Fix LDAP referral loop

[Jan Kalina]

Hi,
I has prepared trivial patch for bug JDK-8176553,
which I would like to get reviewed and sponsored.

I am covered by Red Hat OCA.

The bug affects upstream, JDK9 and JDK8 too.

The reproducer is available in issue tracker:
https://bugs.openjdk.java.net/browse/JDK-8176553

PATCH:
----------------------------------------------
diff --git 
a/src/java.naming/share/classes/com/sun/jndi/ldap/AbstractLdapNamingEnumeration.java
b/src/java.naming/share/classes/com/sun/jndi/ldap/AbstractLdapNamingEnumeration.java
--- 
a/src/java.naming/share/classes/com/sun/jndi/ldap/AbstractLdapNamingEnumeration.java
+++ 
b/src/java.naming/share/classes/com/sun/jndi/ldap/AbstractLdapNamingEnumeration.java
@@ -312,7 +312,8 @@

         if ((refEx != null) &&
             (refEx.hasMoreReferrals() ||
-             refEx.hasMoreReferralExceptions())) {
+             refEx.hasMoreReferralExceptions()) &&
+             ! (errEx instanceof LimitExceededException)) {

             if (homeCtx.handleReferrals == LdapClient.LDAP_REF_THROW) {
                 throw (NamingException)(refEx.fillInStackTrace());
----------------------------------------------

Thanks,
Jan Kalina