chenejac
commented
6 years ago Graham Triggs said:
The Freemarker error appears to be a consequence of it going through the error handling routines - which itself is a result of the VitroLinkedDataFragmentServlet throwing an exception.
The exception from the servlet code should be in the vivo log.
Note that the standard implementation of LDF is simply executing construct queries. For Vitro, this has been wrapped in the RDFService, and so we run construct queries against the triple store.
The only difference with SDB is that if you are doing an empty query (no subject, predicate or object), and the code knows the database it is running against, it uses a custom implementation to query SQL database directly to retrieve the required rows, because that is much faster than the way construct queries get translated by SDB.
Otherwise, SDB and TDB should be doing exactly the same thing in querying the store with constructs.
Benjamin Gross (Migrated from VIVO-1615) said:
The Linked Data Fragment/TPF server doesn't appear to work when running VIVO on a TDB database. It works with SDB.
The TPF server should show results if you go to http://localhost:8080/tpf/core (e.g. https://connect.unavco.org/tpf/core)
When running TDB, I get the following error:
I think the Freemarker error being thrown is obscuring the actual problem.