[Wikidata-tech] rdfs:label referring to non-existent column causes Blazegraph high CPU/RAM and then MemoryManagerOutOfMemory

Mon, 24 Apr 2017 05:29:15 -0700 

Hi,
I'm referring to a query like this, based on the Wikidata cats example:

SELECT ?item
WHERE
{
    ?item wdt:P31 wd:Q146 .
    ?crash rdfs:label ?_crashLabel
}

on my local Blazegraph, I can see that it uses up all the CPU cores and
goes up in RAM, and eventually kills the query with:
Caused by: com.bigdata.rwstore.sector.MemoryManagerOutOfMemory
        at
com.bigdata.rwstore.sector.MemoryManager.getSectorFromFreeList(MemoryManager.java:646)

Could Blazegraph prevent this query from even starting?
Thanks!

Cheers
Miguel

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