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Posted to dev@directory.apache.org by "Sumit Goyal (JIRA)" <ji...@apache.org> on 2009/06/16 12:37:08 UTC
[jira] Reopened: (DIRSERVER-1369) Concurrent bind and unbind of
objects puts ADS in an inconsistent (unusable) state.
[ https://issues.apache.org/jira/browse/DIRSERVER-1369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sumit Goyal reopened DIRSERVER-1369:
------------------------------------
Hi Emmanuel
We were able to make the 1.5.5 server up and running. The problem reported initially still exists.
We modified the program written by you. Earlier the loop (doing unbind and bind operations) was run 100 times per thread. We changed it to run forever.
This causes the same error, which came around 2300th operation for all threads.
Adding one of the exception stack traces we got:
ERROR - 2322javax.naming.NamingException: [LDAP: error code 80 - OTHER: failed for Del request
Entry : '2.5.4.3=adsadminpref_worker-thread0,2.5.4.11=system'
: Error during underflow [3]]; remaining name 'cn=adsadminPref_Worker-Thread0,ou=system'
at com.sun.jndi.ldap.LdapCtx.mapErrorCode(Unknown Source)
at com.sun.jndi.ldap.LdapCtx.processReturnCode(Unknown Source)
at com.sun.jndi.ldap.LdapCtx.processReturnCode(Unknown Source)
at com.sun.jndi.ldap.LdapCtx.c_unbind(Unknown Source)
at com.sun.jndi.toolkit.ctx.ComponentContext.p_unbind(Unknown Source)
at com.sun.jndi.toolkit.ctx.PartialCompositeContext.unbind(Unknown Source)
at com.sun.jndi.toolkit.ctx.PartialCompositeContext.unbind(Unknown Source)
at Emmanuel.setUserPreferences(Emmanuel.java:150)
at Emmanuel.run(Emmanuel.java:67)
Please look into the issue. Will upload the test program used by us. pls let us know if you need any other information from us.
> Concurrent bind and unbind of objects puts ADS in an inconsistent (unusable) state.
> -----------------------------------------------------------------------------------
>
> Key: DIRSERVER-1369
> URL: https://issues.apache.org/jira/browse/DIRSERVER-1369
> Project: Directory ApacheDS
> Issue Type: Bug
> Affects Versions: 1.5.4
> Environment: Windows-xp, JDK-1.5
> Reporter: Murali Krishna
> Priority: Blocker
> Fix For: 1.5.5
>
> Attachments: MultiThreadedTest.java, MultiThreadedTest.java
>
> Original Estimate: 120h
> Remaining Estimate: 120h
>
> This is with reference to a problem we faced when performing concurrent bind and unbind of objects with ADS-1.5.4 release build.
> Please find the java program at the bottom.
> Steps to reproduce:
> 1. Install apache_1.5.4 zip version of it and not the installer and change port numbers to 1389 and 1636 respectively.
> 2. Create a naming context ( JDBM partition) on the lines of dc=example,dc=com
> 3. Also create the entry dc=example,dc=com
> 4. Run the java program provided below.
> Actual Result:
> The console throws up numerous Naming Exceptions with message "[LDAP: error code 80 - OTHER: failed for Del request
> Entry : '2.5.4.3=adsadminpref_thread-11,0.9.2342.19200300.100.1.25=example,0.9.2342.19200300.100.1.25=com'
> : null]; remaining name 'cn=tdsadminPref_Thread-11,dc=telelogic,dc=com' " for each thread operating on a preference object.
> As a result, the server gets into an inconsistent state and unoperational.
> Expected Result:
> The server should continuously bind and unbind the java hash table object.
> What could have caused this and how do we correct this.
> Are there any specific configurations to be made in the server.xml.
> I tried modifying some of the attributes like syncOnWrite, syncOnMillis, maxThreads, cachesize and also rebind (instead of bind and unbind) in the java program , but in vain.
> This is very important for us and do help us in this regard.
> Java program:
> import java.util.Date;
> import java.util.HashMap;
> import java.util.Hashtable;
> import java.util.Map;
> import javax.naming.CommunicationException;
> import javax.naming.Context;
> import javax.naming.NameAlreadyBoundException;
> import javax.naming.NameNotFoundException;
> import javax.naming.NamingException;
> import javax.naming.ldap.InitialLdapContext;
> import javax.naming.ldap.LdapContext;
> import com.telelogic.tds.common.TDSConstants;
> import com.telelogic.tds.common.TDSProperties;
> import com.telelogic.tds.engine.ldap.jndi.TDSDirObjectConstants;
> public class MultiThreadedTest extends Thread {
> @Override
> public void run() {
> try {
> LdapContext _tdsContext = null, _cntx;
> _tdsContext = getContext();
> // Create the initial context
> Map<String, Object> hMap = new HashMap<String, Object>();
> hMap.put("data", "dsfdfd");
> // authenticate user
> int delay = 1;
> while (true) {
> try {
> System.out.println(" Ops started " + getName());
> _cntx = _tdsContext.newInstance(null);
> setUserPreferences(_cntx, "adsadminPref_" + getName(), hMap);
> System.out.println(new Date()
> + " Preferences SET "
> + getName()
> + " "
> + getId()
> + " SIZE-- "
> + ((hMap.get("data") != null) ? hMap.get("data")
> .toString().length() : 0));
> _cntx.close();
> System.out.println(" Ops conducted successfully "
> + getName());
> } catch (NamingException e) {
> System.out.println(new Date() + " NAMING EXCETPION"
> + getName() + " " + getId());
> e.printStackTrace();
> } catch (Exception ex) {
> System.out.println(new Date() + " NAMING EXCETPION"
> + getName() + " " + getId());
> ex.printStackTrace();
> }
> Thread.sleep(delay);
> }
> } catch (Throwable e) {
> e.printStackTrace();
> }
> }
> private static LdapContext getContext() {
> Hashtable<String, String> env = new Hashtable<String, String>();
> LdapContext context = null;
> String adminName = "uid=admin,ou=system";
> String adminPassword = "secret";
> env.put(Context.INITIAL_CONTEXT_FACTORY,
> "com.sun.jndi.ldap.LdapCtxFactory");
> env.put(Context.SECURITY_AUTHENTICATION, "simple");
> env.put(Context.SECURITY_PRINCIPAL, adminName);
> env.put(Context.SECURITY_CREDENTIALS, adminPassword);
> //env.put(Context.PROVIDER_URL, "ldap://10.255.0.40:389");
> env.put(Context.PROVIDER_URL, "ldap://localhost:1389");
> env.put(TDSConstants.JNDI_LDAP_CONNECTION_TIMEOUT, TDSProperties
> .getProperty(TDSConstants.LDAP_CONNECTION_TIMEOUT, "2000"));
> env.put("com.sun.jndi.ldap.connect.pool", TDSProperties.getProperty(
> "com.sun.jndi.ldap.connect.pool", "true"));
> try {
> context = new InitialLdapContext(env, null);
> } catch (NamingException ne) {
> System.exit(1);
> }
> return context;
> }
> public static void setUserPreferences(LdapContext context, String userName,
> Map<String, Object> attributes) throws NamingException {
> LdapContext derivedContext = context;
> String bindOp =
> TDSDirObjectConstants.CN + TDSDirObjectConstants.EQUAL_SYNTAX
> + userName + "," + "dc=example,dc=com";
> try {
> try {
> // Step 1: Unbind the user preferences data
> derivedContext.unbind(bindOp);
> } catch (CommunicationException ce) {
> System.out.println("Trying to re-connect to RDS");
> //Impl reconnect logic
> } catch (NameNotFoundException nnf) {
> System.out.println("User: " + userName
> + " cannot be found in the Ldap server");
> }
> try {
> // Step 2: Bind the user preferences data
> derivedContext.bind(bindOp, attributes);
> } catch (CommunicationException ce) {
> System.out.println("Trying to re-connect to RDS");
> } catch (NameAlreadyBoundException nab) {
> System.out.println("User: " + userName
> + " already exists in the Ldap server");
> }
> //derivedContext.rebind(bindOp, attributes);
> } catch (NamingException ne) {
> System.out.println("Could not set user profile for user: "
> + userName);
> throw ne;
> }
> }
> /**
> * @param args
> */
> public static void main(String[] args) {
> Thread t1, t2 = null;
> for (int i = 0; i < 15; ++i) {
> t1 = new MultiThreadedTest();
> t1.start();
> }
> }
> }
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