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https://issues.apache.org/jira/browse/JCR-1359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stefan Guggisberg reopened JCR-1359:
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reopening because o.a.j.core.ConcurrentNodeModificationTest still occasionally
fails with the same symptoms as described in this issue
> Adding nodes from concurrently running sessions cause exceptions
> ----------------------------------------------------------------
>
> Key: JCR-1359
> URL: https://issues.apache.org/jira/browse/JCR-1359
> Project: Jackrabbit
> Issue Type: Bug
> Components: jackrabbit-core
> Affects Versions: 1.3.3, 1.4, core 1.4.1
> Reporter: Alexander Nesterov
> Assignee: Stefan Guggisberg
> Priority: Critical
> Fix For: core 1.4.2
>
>
> Exceptions are thrown when trying to add child nodes to one parent node from
> different sessions running concurrently. One of the following exceptions is
> always thrown:
> * Exception in thread "Thread-8" java.lang.RuntimeException:
> javax.jcr.nodetype.ConstraintViolationException: /A/7 needs to be saved as
> well.
> * Exception in thread "Thread-8" java.lang.RuntimeException:
> javax.jcr.RepositoryException: /A: unable to update item.: Unable to
> resolve path for item:
> 016b885a-64aa-45b9-a990-05cbabb4586f/{http://www.jcp.org/jcr/1.0}primaryType:
> Unable to resolve path for item:
> 016b885a-64aa-45b9-a990-05cbabb4586f/{http://www.jcp.org/jcr/1.0}primaryType
> According to JCR-584 "Improve handling of concurrent node modifications" the
> following scenario "session 1 adds or removes child node 'x', session 2 adds
> or removes child node 'y'" should run gracefully, but the following test
> constantly fails:
> public void testSync() throws Exception
> {
> Node rootNode = getSession ().getRootNode ();
> rootNode.addNode ("A");
> rootNode.save();
> final Session session1 = getRepository().login (new SimpleCredentials
> ("userName", "password".toCharArray()));
> final Session session2 = getRepository().login (new SimpleCredentials
> ("userName", "password".toCharArray()));
> Thread thread1 = new Thread (new Runnable()
> {
> public void run()
> {
> try
> {
> addNodes ("A", session1, 0);
> }
> catch (RepositoryException ex)
> {
> throw new RuntimeException (ex);
> }
> }
> });
> Thread thread2 = new Thread (new Runnable()
> {
> public void run()
> {
> try
> {
> addNodes ("A", session2, 1001);
> }
> catch (RepositoryException ex)
> {
> throw new RuntimeException (ex);
> }
> }
> });
> thread1.start();
> thread2.start();
> thread1.join();
> thread2.join();
> }
> private void addNodes (String parentName, Session session, int startIndex)
> throws RepositoryException
> {
> Node parentNode = session.getRootNode().getNode (parentName);
> for (int i = startIndex; i < startIndex + 100; i++)
> {
> String name = Integer.toString (i);
> parentNode.addNode (name);
> parentNode.save();
> }
> }
> BTW: exceptions were also thrown when I tried to add nodes from one thread
> and remove some of them from another one. Each thread used it's own session,
> each node had unique name.
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