Virtuoso docker container dies on a specific SPARQL query

[ailintom]

Virtuoso Version 07.20.3242-pthreads for Linux as of Oct 14 2025 (a0312da)
fails on the query given below. The docker container quits without any error message; no error in the logs either
This happens on with empty dataset on two different machines.

SELECT * WHERE {    SELECT ?framework_subject (SAMPLE(?varV_1) AS ?varV_1_agg) (SAMPLE(?varV_3) AS ?varV_3_agg) (SAMPLE(?varV_1_framework_sortkey) AS ?varV_1_framework_sortkey_agg) WHERE {    GRAPH <https://purl.org/example/> {      ?framework_subject <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?framework_subject_type.      ?framework_subject <https://purl.org/example/ontology#objectClass> ?varF_2.      ?framework_subject (((<http://www.cidoc-crm.org/extensions/crmarchaeo/AP18i_is_embedded>/<http://www.cidoc-crm.org/extensions/crmarchaeo/AP19_is_embedding_in>)|(<http://www.cidoc-crm.org/extensions/crmsci/O19i_was_object_encountered_through>/<http://www.cidoc-crm.org/cidoc-crm/P9i_forms_part_of>/<http://www.cidoc-crm.org/cidoc-crm/P7_took_place_at>))/<http://www.cidoc-crm.org/cidoc-crm/P189i_is_approximated_by>/(<http://www.cidoc-crm.org/cidoc-crm/P89_falls_within>*)) ?varF_3.    }    GRAPH <https://purl.org/example/sortkeys/> {      ?framework_subject <http://www.w3.org/2000/01/rdf-schema#label> ?varF_1_framework_reif.      ?varF_1_framework_reif <https://purl.org/framework/ontology#originalValue> ?varF_1.      ?varF_1_framework_reif <https://purl.org/framework/ontology#searchValue> ?varF_1_framework_searchvalue.    }    OPTIONAL {      GRAPH <https://purl.org/example/sortkeys/> {        ?framework_subject <http://www.w3.org/2000/01/rdf-schema#label> ?varV_1_framework_reif.        ?varV_1_framework_reif <https://purl.org/framework/ontology#originalValue> ?varV_1.        ?varV_1_framework_reif <https://purl.org/framework/ontology#sortKey> ?varV_1_framework_sortkey.      }    }    OPTIONAL {      GRAPH <https://purl.org/example/> { ?framework_subject <https://purl.org/example/ontology#objectClass> ?varV_2. }      OPTIONAL {        GRAPH <https://purl.org/example/vocab/> { ?varV_2 <http://www.w3.org/2004/02/skos/core#prefLabel> ?varV_3. }         }    }      }  GROUP BY ?framework_subject }  ORDER BY ASC(?varV_1_framework_sortkey_agg) LIMIT 100 OFFSET 0 

The query works fine in Apache Fuseki and Qlever

[TallTed]

First thing, can you test against the beta docker image pkleef/virtuoso-opensource-7:latest that is built from the latest commit? A number of fixes and other commits have been made since October.

Assuming the latest build also crashes, can you start it in DEBUG+FOREGROUND mode to maximize log entries, and repeat the test? Relevant log entries may be obvious, or you can submit the whole thing as an issue attachment, or here as inline text if only 25 or so lines.

[ailintom]

@TallTed Thank you very much for you reply. I've tried pkleef/virtuoso-opensource-7:latest it also fails. And if I tried to start debug correctly, it crashes silently

[HughWilliams]

@ailintom We have been able to recreate this issue in-house running the query against the latest Virtuoso 7.2 open source binary and are looking into it ...

Note the problem does not occur with the latest Virtuoso 8.3 commercial binary.