Java 1.3.1_08 process gets hung in
com.sun.jndi.ldap.LdapName$TypeAndValue.unescapeValue(LdapName.java:833),
when "\" escape sequences are used.
Processor load is up to 100%.
The problem is supposed to be nearly strictly reproducible.
1. Testcase
-----------
Please note, the testcase requires an iPlanet Directory Server Installation
in order to supply LDAP user info.
Customer used iPlanet DS 5.1 SP 1 20020606 (Build 2002.161.2231)
(Administration Server 5.1 (Build 2002.158.2342)), running on Win2k Advanced
SP3).
The testcase consist of the following files:
-rw-r--r-- 1 tl15687 sun 3131 Jul 17 13:08 SearchTest.java
-rw-r--r-- 1 tl15687 sun 947 Jul 17 13:09 u0146220.ldif
% more SearchTest.java
/*
* Created on 16.07.2003
*/
//package com.sap.security.test;
import java.util.Hashtable;
import javax.naming.*;
import javax.naming.directory.*;
/**
* @author D037363
*/
public class SearchTest {
static int timelimit = 50000;
static int sizelimit = 2000;
static String baseDN= "cn=test\\u0146220";
static String user = "cn=Directory Manager";
//please adjust to your settings
static String password = "<your password>";
static String providerURL =
"ldap://<your directory server>:389/ou=usermapping,ou=portal_ldap,dc=um.wdf.sap.corp";
public static void main(String[] args) {
InitialDirContext ctx = openContext();
SearchControls searchControls = new SearchControls();
searchControls.setTimeLimit(timelimit);
searchControls.setCountLimit(sizelimit);
searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
searchControls.setReturningObjFlag(true);
searchControls.setDerefLinkFlag(false);
//searchControls.setReturningAttributes(new String[] {"wpproperty"});
try {
//NamingEnumeration answers = ctx.search(baseDN,"(&(objectclass=WPNamespace))", searchControls);
NamingEnumeration answers =
ctx.search(baseDN,"(&(objectclass=applicationmap))",
searchControls);
// set data bag
while(answers.hasMore()) {
// get the entry from the search
/** this is the statement where the thread never returns !!! */
SearchResult sr = (SearchResult) answers.next();
Attributes attrs = sr.getAttributes();
// if there is no mapping read the attributes by physical name
NamingEnumeration ae = attrs.getAll();
while (ae.hasMore()) {
Attribute oneAttribute = (Attribute)ae.next();
// get attribute name
String currentAttribute = oneAttribute.getID();
if (oneAttribute != null) {
NamingEnumeration allValues = oneAttribute.getAll();
while (allValues.hasMore()) {
System.out.println(
currentAttribute+" = "+(String) allValues.next());
}
}
}//end while
}
}catch (NoInitialContextException e) {
String logMessage =
"ADAPTER: Test JNDI NoInitialContext Exception when "
+"reading subcontext. System Msg: " + e;
System.out.println(logMessage);
}catch(CommunicationException e) {
String logMessage =
"ADAPTER: Test JNDI Communication Exception when reading "
+"subcontext. System Msg: " + e;
System.out.println(logMessage);
}catch (NamingException e) {
System.out.println(
"Adapter: Test JNDI Exception getting attributes, DN:"
+baseDN+" System Msg: ");
}
}
public static InitialDirContext openContext () {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, user);
env.put(Context.SECURITY_CREDENTIALS, password);
env.put(Context.PROVIDER_URL, providerURL);
InitialDirContext ctx = null;
try {
ctx = new InitialDirContext(env);
} catch (Exception e) {
System.out.println("exception when trying to open connection "
+e.getMessage());
}
return ctx;
}
}
%
% more u0146220.ldif
dn: uid=de-dus-mgh-m-02\u0146220, ou=People, dc=prod, dc=magis.mgi.de
uid: de-dus-mgh-m-02\u0146220
uid: de-dus-mgh-m-02u0146220
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: inetorgperson
givenName: Dirk
sn: Winkler
cn: Dirk Winkler
dn: cn=de-dus-mgh-m-02\u0146220, ou=UserMapping, dc=prod, dc=magis.mgi.de
uid: UGM_de-dus-mgh-m-02\u0146220
objectClass: usergroupmap
objectClass: top
cn: de-dus-mgh-m-02\u0146220
cn: de-dus-mgh-m-02u0146220
dn: cn=de-dus-mgh-m-02\u0146220, ou=customattributes, dc=prod, dc=magis.mgi.d
e
objectClass: wpuser
objectClass: top
cn: de-dus-mgh-m-02\u0146220
cn: de-dus-mgh-m-02u0146220
dn: cn=com.sapportals.portal.security.usermanagement, cn=de-dus-mgh-m-02\u014
6220, ou=customattributes, dc=prod, dc=magis.mgi.de
objectClass: wpnamespace
objectClass: top
wpproperty: accessibilitylevel:0
cn: com.sapportals.portal.security.usermanagement
%
2. Thread Dump
--------------
Java Thread dump shows the following characteristic threads:
(This information was taken from a process running in SAP Portal environment.)
"Client_Thread_31" prio=5 tid=0x44c84cd8 nid=0x840 waiting for monitor entry [0x
4731f000..0x4731fdbc]
at java.lang.String.<init>(String.java:364)
at java.lang.String.<init>(String.java:406)
at java.lang.String.<init>(String.java:427)
at com.sun.jndi.ldap.LdapName$TypeAndValue.unescapeValue(LdapName.java:8
33)
at com.sun.jndi.ldap.LdapName$TypeAndValue.getValueComparable(LdapName.j
ava:714)
at com.sun.jndi.ldap.LdapName$TypeAndValue.compareTo(LdapName.java:676)
at com.sun.jndi.ldap.LdapName$Rdn.compareTo(LdapName.java:616)
at com.sun.jndi.ldap.LdapName$Rdn.equals(LdapName.java:605)
at com.sun.jndi.ldap.LdapName.matches(LdapName.java:245)
at com.sun.jndi.ldap.LdapName.startsWith(LdapName.java:195)
[...]
"Client_Thread_30" prio=5 tid=0x44c83e80 nid=0x6c4 waiting for monitor entry [0x
472df000..0x472dfdbc]
at java.lang.String.<init>(String.java:364)
at java.lang.String.<init>(String.java:406)
at java.lang.String.<init>(String.java:427)
at com.sun.jndi.ldap.LdapName$TypeAndValue.unescapeValue(LdapName.java:8
33)
at com.sun.jndi.ldap.LdapName$TypeAndValue.getValueComparable(LdapName.j
ava:714)
at com.sun.jndi.ldap.LdapName$TypeAndValue.compareTo(LdapName.java:676)
at com.sun.jndi.ldap.LdapName$Rdn.compareTo(LdapName.java:616)
at com.sun.jndi.ldap.LdapName$Rdn.equals(LdapName.java:605)
at com.sun.jndi.ldap.LdapName.matches(LdapName.java:245)
at com.sun.jndi.ldap.LdapName.startsWith(LdapName.java:195)
at com.sun.jndi.ldap.LdapSearchEnumeration.createItem(LdapSearchEnumerat
ion.java:52)
[...]
"Client_Thread_28" prio=5 tid=0x44c82920 nid=0x8e4 waiting for monitor entry [0x
4725e000..0x4725fdbc]
at sun.io.ByteToCharUTF8.convert(ByteToCharUTF8.java:45)
at java.lang.String.<init>(String.java:367)
at java.lang.String.<init>(String.java:406)
at java.lang.String.<init>(String.java:427)
at com.sun.jndi.ldap.LdapName$TypeAndValue.unescapeValue(LdapName.java:8
33)
at com.sun.jndi.ldap.LdapName$TypeAndValue.getValueComparable(LdapName.j
ava:714)
at com.sun.jndi.ldap.LdapName$TypeAndValue.compareTo(LdapName.java:676)
at com.sun.jndi.ldap.LdapName$Rdn.compareTo(LdapName.java:616)
at com.sun.jndi.ldap.LdapName$Rdn.equals(LdapName.java:605)
at com.sun.jndi.ldap.LdapName.matches(LdapName.java:245)
at com.sun.jndi.ldap.LdapName.startsWith(LdapName.java:195)
[...]