Sporadic HTTP Status 500 from SPARQL API

I have a Java application that sends tens of thousands of SPARQL read and update queries to a Stardog server via the SPARQL endpoint. But in a typical run, about 60 queries, both read and update, fail with HTTP Status 500 and no other explanation that I can find. If I copy & paste the failed queries from my log into Stardog Studio and run them one at a time, there's no problem. Could it be a concurrency issue? (My app is multi-threaded.) Or something else?

Welcome Theodore. I would recommend first checking for any errors in Stardog's log file on the server, named stardog.log. Please share any errors that you find.


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