We finally tried looking into various service settings and found:
It happen due to settings in Apache Sling Resource Resolver Factory settings under Felix configMgr is tampered. We faced this issue and found that the setting for Resource Search Path is missing all entry. Verify the default entry should have following:
We have similar problem:
02.05.2016 16:22:29.536 *ERROR* [172.18.138.10  GET /content/bla/bla/de.html HTTP/1.1] org.apache.sling.servlets.get.impl.DefaultGetServlet No renderer for extension html, cannot render resource JcrNodeResource, type=nt:unstructured, superType=null, path=/content/bla/bla/de/jcr:content/footer/morelinks/link_0_copy
We checked Apache Sling Resource Resolver Factory and found exactly the 4 entries mentioned above in the Resource Search Path.
More recommendations, how to solve this problem?
I didn't find the solution for this issue but I'm not sure why Rohan's answer was marked as correct when it doesn't resolve the issue.
I went to
and confirmed that the above is already in the Apache Sling Resource Resolver Factory.
Has anyone came across a solution to this issue?