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https://issues.apache.org/jira/browse/JCR-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13115387#comment-13115387
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Julian Reschke commented on JCR-3006:
-------------------------------------
Angela notes that this is not specific to the "intermediate" path signature.
The user manager might be configured to introduce intermediate paths
automatically, in which case the same problem can occur.
> UserManager: concurrent user creation using same intermediate path fails
> ------------------------------------------------------------------------
>
> Key: JCR-3006
> URL: https://issues.apache.org/jira/browse/JCR-3006
> Project: Jackrabbit Content Repository
> Issue Type: Bug
> Components: security
> Affects Versions: 2.2.7
> Reporter: Stefan Guggisberg
> Attachments: ConcurrentCreateUserTest.java,
> ConcurrentCreateUserTest.java, ConcurrentCreateUserTest.java
>
>
> concurrently creating users using same intermediate path fails with "node ...
> has been modified externally".
> the problem is the intermediate path. if it doesn't exist multiple threads
> try to create it concurrently:
> o.a.jackrabbit.core.security.user.UserManagerImpl, line 1310ff:
> String[] segmts = defaultPath.split("/");
> NodeImpl folder = (NodeImpl) session.getRootNode();
> String authRoot = (isGroup) ? groupsPath : usersPath;
> for (String segment : segmts) {
> if (segment.length() < 1) {
> continue;
> }
> if (folder.hasNode(segment)) {
> folder = (NodeImpl) folder.getNode(segment);
> if (Text.isDescendantOrEqual(authRoot, folder.getPath())
> &&
> !folder.isNodeType(NT_REP_AUTHORIZABLE_FOLDER)) {
> throw new ConstraintViolationException("Invalid
> intermediate path. Must be of type rep:AuthorizableFolder.");
> }
> } else {
> Node parent = folder;
> folder = addNode(folder, session.getQName(segment),
> NT_REP_AUTHORIZABLE_FOLDER);
> }
> }
> the attached test case illustrates this issue/
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