Getting error "Can't create child on a synthetic root" in 6.3

[anushap40132887]

Hi All,

I am getting below error in aem 6.3 while trying to post a document to a folder in aem from another application. The same is working fine in aem 6.1. The user account used for this action is having full access.

*ERROR* [10.43.32.4 [1531475997878] POST /content/***/***/files HTTP/1.1] org.apache.sling.servlets.post.impl.operations.ModifyOperation Exception during response processing.

java.lang.IllegalArgumentException: Can't create child on a synthetic root

at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.create(ResourceResolverImpl.java:1156)

at org.apache.sling.servlets.post.impl.operations.AbstractCreateOperation.deepGetOrCreateNode(AbstractCreateOperation.java:584)

at org.apache.sling.servlets.post.impl.operations.AbstractCreateOperation.processCreate(AbstractCreateOperation.java:107)

at org.apache.sling.servlets.post.impl.operations.ModifyOperation.doRun(ModifyOperation.java:91)

at org.apache.sling.servlets.post.AbstractPostOperation.run(AbstractPostOperation.java:97)

at org.apache.sling.servlets.post.impl.SlingPostServlet.doPost(SlingPostServlet.java:205)

at org.apache.sling.api.servlets.SlingAllMethodsServlet.mayService(SlingAllMethodsServlet.java:149)

at org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:346)

at org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:378)

at org.apache.sling.engine.impl.request.RequestData.service(RequestData.java:552)

at org.apache.sling.engine.impl.filter.SlingComponentFilterChain.render(SlingComponentFilterChain.java:44)

at org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:77)

at com.day.cq.wcm.core.impl.WCMDebugFilter.doFilter(WCMDebugFilter.java:156)

at org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:68)

at com.day.cq.wcm.core.impl.WCMComponentFilter.filterRootInclude(WCMComponentFilter.java:375)

at com.day.cq.wcm.core.impl.WCMComponentFilter.doFilter(WCMComponentFilter.java:190)

at org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:68)

[Jaideep_Brar]

The exception was occurring while AEM is trying to read the grandparent node(2 level above) and it's not able to read that node.

if ( ResourceUtil.isSyntheticResource(parent) ) {

            Resource grandParent = parent.getParent();

            if (grandParent != null) {

                this.create(grandParent, parent.getName(), null);

            } else {

                throw new IllegalArgumentException("Can't create child on a synthetic root");

            }

This was resolved by providing Read/Write access to the user where nodes were created?

[kautuk_sahni · Accepted solution]

Can you just check this with admin user or add everyone group to root folder(I do read that you having given full access)?

If this problem still persists then create a case with Support with Referring  CQ-4218938.

-Kautuk