GUI message "Couldn't load Schema in 15 seconds, it may be too large." but schema is small

Conrad Leonard

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Jul 22, 2015, 1:39:22 AM7/22/15

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== Summary ==

Running 3.1.3

I create a database with about 2k triples in a named graph that is specified in config as the TBOX. All other settings are default.

I add 200k+ triples to a different named graph.

Browsing the data in the UI gives the message "Couldn't load Schema in 15 seconds, it may be too large."

If I instead add the 200k+ triples to the default graph, the message is not shown and I can browse the class tree in the UI just fine.

== Reproduce failure ==

[conradL@qimr13054 ~]$ stardog-admin db create -o reasoning.schema.graphs=foo:bar -n test
Successfully created database 'test'.

[conradL@qimr13054 ~]$ stardog data add -g foo:bar test ~/workspace/grafli/ontology/grafli-tbox.owl
Adding data from file: /home/conradL/workspace/grafli/ontology/grafli-tbox.owl
Added 2,146 triples in 00:00:00.061

[conradL@qimr13054 ~]$ stardog data add -g baz:quux test /tmp/grafli-ui-rebuild.1437537973/study\:cca9365f-b292-484f-9eab-2c143bebb2b4.ttl 
Adding data from file: /tmp/grafli-ui-rebuild.1437537973/study:cca9365f-b292-484f-9eab-2c143bebb2b4.ttl
Added 263,255 triples in 00:00:01.312
[conradL@qimr13054 ~]$ stardog query  test "SELECT ?g (count(?s) as ?n) WHERE { GRAPH ?g { ?s ?p ?o } } GROUP BY ?g"
+----------+--------+
|    g     |   n    |
+----------+--------+
| foo:bar  | 2146   |
| baz:quux | 263255 |
+----------+--------+

Query returned 2 results in 00:00:00.039

[conradL@qimr13054 ~]$ stardog-admin metadata get -o reasoning.schema.graphs test
+-------------------------+---------+
|         Option          |  Value  |
+-------------------------+---------+
| reasoning.schema.graphs | foo:bar |
+-------------------------+---------+

At this point, navigating to http://localhost:5820/test#!/schema shows the blue loading progress bar for a while, then ends with "Couldn't load Schema in 15 seconds, it may be too large."

== Reproduce success ==

Remove the data from the named graph and add to the default graph:

[conradL@qimr13054 ~]$ stardog data remove -g baz:quux test 
Removed 263,255 triples in 00:00:00.501

[conradL@qimr13054 ~]$ stardog data add test /tmp/grafli-ui-rebuild.1437537973/study\:cca9365f-b292-484f-9eab-2c143bebb2b4.ttl 
Adding data from file: /tmp/grafli-ui-rebuild.1437537973/study:cca9365f-b292-484f-9eab-2c143bebb2b4.ttl
Added 263,255 triples in 00:00:01.609

[conradL@qimr13054 ~]$ stardog query  test "SELECT ?g (count(?s) as ?n) WHERE { GRAPH ?g { ?s ?p ?o } } GROUP BY ?g"
+---------+-------+
|    g    |   n   |
+---------+-------+
| foo:bar | 2146  |
+---------+-------+

Query returned 1 results in 00:00:00.033

[conradL@qimr13054 ~]$ stardog query  test "SELECT (count(?s) as ?n) WHERE { ?s ?p ?o }"
+--------+
|   n    |
+--------+
| 263255 |
+--------+

At this point, navigating to http://localhost:5820/test#!/schema works just fine.

Same behaviour if one uses SPARQL MOVE to move data between default & named graphs, e.g MOVE <baz:quux> TO DEFAULT makes the UI browser behave again; MOVE DEFAULT TO <baz:quux> shows the "Couldn't load Schema..." message.

I can supply the data if you wish.

Michael Grove

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Jul 22, 2015, 2:41:10 PM7/22/15

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This sounds like a known issue, #2387, and it's been fixed for the next revision.

Cheers,

Mike

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Pavel Klinov

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Jul 22, 2015, 3:43:26 PM7/22/15

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Again, we wouldn't mind having the data to verify that it's been fixed.

Thanks,

Pavel

Conrad Leonard

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Jul 22, 2015, 8:27:42 PM7/22/15

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Hi Pavel;

I have uploaded obfuscated data & a simple script to reproduce the behaviour to "Conrad's data/UI class browser issue with named graphs" folder in Dropbox.