Re: [Virtuoso-users] strange error when bulk-loading Turtle files

2018-12-18 Thread Hugh Williams
Hi Peter, I generated the datasets from your python script and loaded them into a local Virtuoso open source multiple times but did not see any occurrences of the error: SQL> select * from load_list; ll_file ll_graph

Re: [Virtuoso-users] strange error when bulk-loading Turtle files

2018-12-18 Thread Peter F. Patel-Schneider
I created some synthetic data that tickles the bug reliably on my machine with a standard virtuoso.ini (just adding the directory for the files to the allowed list). I'm attaching the generator program for the files and a loading script. peter On 12/18/18 9:46 AM, Peter F. Patel-Schneider wrote

Re: [Virtuoso-users] strange error when bulk-loading Turtle files

2018-12-18 Thread Peter F. Patel-Schneider
I did a bit of digging and it sure looks as if there is a race condition in rdf_rl_lang_id in ttlpv.sql. This code appears to check to see if the language tag is already in DB.DBA.RDF_LANGUAGE and adds it if not. But another thread could do the same insert between the check and the insert, as fa

Re: [Virtuoso-users] strange error when bulk-loading Turtle files

2018-12-18 Thread Peter F. Patel-Schneider
I'm loading the Turtle Wikidata RDF complete dump, split into pieces and loaded with 10 active readers. About half the time the load fails with one or more of these errors. The errors are always near the beginning of the load---in the first group of 10 files to be loaded and near the beginning o