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https://issues.apache.org/jira/browse/JCR-1939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12664816#action_12664816
]
akil ajani commented on JCR-1939:
---------------------------------
Hi,
Please see my code for adding nodes into the jackrabbit by using threads in
different session.
package com.cognizant.jackrabbit;
import javax.jcr.ItemExistsException;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.SimpleCredentials;
import javax.jcr.lock.LockException;
import javax.jcr.nodetype.ConstraintViolationException;
import javax.jcr.version.VersionException;
public class RepositoryDiffSession {
/**
* @param args
*/
public void startAddingKnowledge(){
Repository repository = null;
Session jcrSession;
try {
repository = RepositoryFactory.getInstance("D:/Tomcat
5.0/webapps/JCRTimeLine","login","D:/JCRTimeLine").getRepository();
jcrSession = repository.login(new
SimpleCredentials("userName","password".toCharArray()));
Node rootNode = jcrSession.getRootNode();
rootNode.addNode ("A");
rootNode.save();
final Session session1 = repository.login (new
SimpleCredentials ("userName", "password".toCharArray()));
final Session session2 = repository.login (new
SimpleCredentials ("userName", "password".toCharArray()));
Thread thread1 = new Thread (new Runnable()
{
public void run()
{
try
{
addNodes ("A", session1, 0 , 500);
}
catch (RepositoryException ex)
{
throw new RuntimeException (ex);
}
}
});
Thread thread2 = new Thread (new Runnable()
{
public void run()
{
try
{
addNodes ("A", session2, 501 ,1000);
}
catch (RepositoryException ex)
{
throw new RuntimeException (ex);
}
}
});
thread1.start();
thread2.start();
thread1.join();
thread2.join();
}catch (ItemExistsException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (PathNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (VersionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ConstraintViolationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (LockException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (RepositoryException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void addNodes (String parentName, Session session, int
startIndex , int endIndex)
throws RepositoryException
{
Node parentNode = session.getRootNode().getNode (parentName);
for (int i = startIndex; i < endIndex; i++)
{
String name = Integer.toString (i);
parentNode.addNode (name);
parentNode.save();
System.out.println("Document " + name + " added
successfully...");
}
}
public static void main(String[] args) {
RepositoryDiffSession repositoryDiffSession = new
RepositoryDiffSession();
repositoryDiffSession.startAddingKnowledge();
}
}
I faced this exception
Exception in thread "Thread-10" java.lang.RuntimeException:
javax.jcr.InvalidItemStateException: 7cc640a9-5dad-44c7-ae5a-90cfd37b87db has
been modified externally
at
com.cognizant.jackrabbit.RepositoryDiffSession$1.run(RepositoryDiffSession.java:43)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.jcr.InvalidItemStateException:
7cc640a9-5dad-44c7-ae5a-90cfd37b87db has been modified externally
at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:1109)
at
com.cognizant.jackrabbit.RepositoryDiffSession.addNodes(RepositoryDiffSession.java:100)
the exception occurred is exactly similar with JCR-1359. Please help me to
resolve this.
> If we threading to add nodes into the repository
> ------------------------------------------------
>
> Key: JCR-1939
> URL: https://issues.apache.org/jira/browse/JCR-1939
> Project: Jackrabbit Content Repository
> Issue Type: Bug
> Affects Versions: 1.5.0
> Environment: Microsoft windows XP professional, 2GB ram
> Reporter: akil ajani
> Assignee: Jukka Zitting
> Fix For: 1.5.0
>
>
> Senario 1:
> we have a root node and it has 1 parent node. i am trying to add 600 nodes to
> that parent node. so i have created 3 threads and each thread is adding 200
> nodes. it works for some time and later on throws an exception
> java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:787)
> at java.util.HashMap$ValueIterator.next(HashMap.java:817)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at
> org.apache.jackrabbit.core.state.SessionItemStateManager.getDescendantTransientItemStates(SessionItemStateManager.java:376)
> at
> org.apache.jackrabbit.core.ItemImpl.getTransientStates(ItemImpl.java:361)
> at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:1079)
> at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:849)
> some time it gets HANGED
> Scenario:2
> we have a root node and it has 2 parent node. i am trying to add 600 nodes to
> eac parent node. so i have created 2 threads and each thread is adding 600
> nodes to cach parent node. it works for some time and later on throws an
> exception
> java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:787)
> at java.util.HashMap$ValueIterator.next(HashMap.java:817)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at
> org.apache.jackrabbit.core.state.SessionItemStateManager.getDescendantTransientItemStates(SessionItemStateManager.java:376)
> at
> org.apache.jackrabbit.core.ItemImpl.getTransientStates(ItemImpl.java:361)
> at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:1079)
> at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:849)
> some time it gets HANGED
> please help me to resolve this issue as soon as possible. i would be thankful
> to you if you could provide me the solution for this as soon as possible
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