When trying to rename a node in AEM getting 'unresolved conflicts' error

[nandan123]

Hi,

I am trying to rename a node using session.move() method, but getting the following error:

CODE: 

private void renameColorProductNodes(Session session, String colorCode, String parentSku, Node productNode)

    throws RepositoryException {

        if (productNode.hasNodes()) {

            NodeIterator nodeItr = productNode.getNodes();

            while (nodeItr.hasNext()) {

                Node currentNode = nodeItr.nextNode();

                if(currentNode.getName().contains(colorCode)) {

                    String currentNodePath = currentNode.getPath();

                    String replacedPath = currentNodePath.replace(TRASH_IMAGE_PREFIX.concat(parentSku).concat(UNDERSCORE).concat(colorCode), parentSku);

                    session.move(currentNodePath, replacedPath);

                }

            }

        }

        session.save();

    }

ERROR:

javax.jcr.InvalidItemStateException: OakState0001: Unresolved conflicts in /content/dam/torrid/pdp-assets/138/861/13886120/06452/Trash
at org.apache.jackrabbit.oak.api.CommitFailedException.asRepositoryException(CommitFailedException.java:238) [org.apache.jackrabbit.oak-api:1.22.6]
at org.apache.jackrabbit.oak.api.CommitFailedException.asRepositoryException(CommitFailedException.java:213) [org.apache.jackrabbit.oak-api:1.22.6]
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.newRepositoryException(SessionDelegate.java:669) [org.apache.jackrabbit.oak-jcr:1.22.6]
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.save(SessionDelegate.java:495) [org.apache.jackrabbit.oak-jcr:1.22.6]
at org.apache.jackrabbit.oak.jcr.session.SessionImpl$8.performVoid(SessionImpl.java:424) [org.apache.jackrabbit.oak-jcr:1.22.6]
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.performVoid(SessionDelegate.java:273) [org.apache.jackrabbit.oak-jcr:1.22.6]
at org.apache.jackrabbit.oak.jcr.session.SessionImpl.save(SessionImpl.java:421) [org.apache.jackrabbit.oak-jcr:1.22.6]
at com.adobe.granite.repository.impl.CRX3SessionImpl.save(CRX3SessionImpl.java:208) [com.adobe.granite.repository:1.6.28.CQ650-B0001]

Any help would be appreciated.

Thanks,

Nandan

[krishna_sai]

Hi @nandan123 , This occurs when resource is modified by concurrent sessions.
Can you try session.refresh(true) before saving the session.


Hope this helps,
Krishna

[nandan123]

Hi @krishna_sai , thanks for your reply

I added 

 session.refresh(true);

 session.save();

but still getting the same error.

[Jagadeesh_Prakash]

@nandan123 

There is no explicit method to rename node in JCR, It can be done only by move method.

Since move method change the order of node but It can be reorder.

JCR 2.0: 23 Orderable Child Nodes (Content Repository for Java Technology API v2.0)

[nandan123]

@Jagadeesh_Prakash Thank you for your reply,

When I try renaming a node, getting this ERROR, how do I solve this?

[Jagadeesh_Prakash]

@nandan123  where is the error?

[nandan123]

@Jagadeesh_Prakash 

javax.jcr.InvalidItemStateException: OakState0001: Unresolved conflicts in /content/dam/torrid/pdp-assets/138/861/13886120/06452/Trash
at org.apache.jackrabbit.oak.api.CommitFailedException.asRepositoryException(CommitFailedException.java:238) [org.apache.jackrabbit.oak-api:1.22.6]
at org.apache.jackrabbit.oak.api.CommitFailedException.asRepositoryException(CommitFailedException.java:213) [org.apache.jackrabbit.oak-api:1.22.6]
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.newRepositoryException(SessionDelegate.java:669) [org.apache.jackrabbit.oak-jcr:1.22.6]
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.save(SessionDelegate.java:495) [org.apache.jackrabbit.oak-jcr:1.22.6]

[Ritesh_Mittal]

Hi @nandan123 ,

Since the issue is because of multiple sessions/threads are concurrently trying to access/update the same node, I think you should consider using Synchronization (Synchronized method in OSGI Service). This will make sure that  the code is not being executed in parallel. Though this might hit performance so just be cautious.

BTW, what is the use case where the code is being executed, workflow?

Good reads-

https://blogs.perficient.com/2017/12/05/2-common-concurrency-pitfalls-in-aem-and-how-to-avoid-them/

https://www.javatpoint.com/synchronization-in-java

Thanks,

Ritesh Mittal

[nandan123]

@Ritesh_Mittal Thank you for your reply,

This code is a part of service which is called in a servlet.

I tried adding synchronized for this method, still getting same error.