Dear all,
from time to time, my Fuseki server starts throwing the following error message on any SPARQL query I pose to one of my graphs: "Error 500: No conversion to a Node: <RDF_Term >" Unfortunately, I couldn't find any explanation of this error message, beyond a discussion of a corrupted TDB2 database. (https://users.jena.apache.narkive.com/LF4XE801/corrupted-tdb2-database)<https://users.jena.apache.narkive.com/LF4XE801/corrupted-tdb2-database> Once this happens, the only thing I could do so far is to drop the entire afflicted graph and rebuild it, but of course that isn't going to be a viable solution in the long term. The only way I interact with Fuseki is by starting and stopping it, querying it via the SPARQL endpoint (and sometimes through the web interface, e.g. when troubleshooting my application), and uploading new triples (as turtle files) via the web interface. I haven't been able to find a pattern in when the error appears so far. Any insights into why this error appears, and what to do in order to avoid it? I'd appreciate any help. Best, Andreas
