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Package installation error


Level 2

Hi All,

We are facing the below issue on installing our code package in AEM 6.1 

"javax.jcr.nodetype.ConstraintViolationException: OakConstraint0021:  Mandatory property jcr:data not found in a new node ".

If any one has come across this issue. Please suggest how to fix it.




0 Replies


Community Advisor


Can you please check this issue raised in GitHub:

The issue appears to be in Oak. describes the issue. Adobe released CQ-6.0.0-HOTFIX-5659 in December which has resolved the issue in my local testing. If you cannot install the hotfix, a workaround for AEM 5.6 to 6.0 migrations is to install Recap in the AEM 5.6 environment and perform the same transfer with the Reverse option checked, to push the content to the AEM 6.0 environment.

check if this can help yours.

~ Prince


Level 2

Thanks for your reply. But am facing this issue in AEM 6.1 and not sure if any hotfix is available for it.


Level 8

Please share logs. Try to remove the node from the package on which it is throwing error.

Now create a custom node and add a property jcr:data.

Also check your code , there must be a custom xtype which requires the jcr:data type property. Remove the constraint on this property


Level 10

Please provide more details about this package - was it built from past versions of AEM. THere are many variables that can account for this. 


Level 2

If packaging users, try adding this filter:

exclude /home/users/.*/.tokens

Otherwise, the .token may be from some other content (consult error log)





1. Try creating package with below exclude filters:




2. Look at this answer:-Filevault OakConstraint0021 exception when copy content

3. Also, Try removing the error causing node and install the package [Do make sure that you backup what you delete].