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From Bjarke Buur Mortensen <>
Subject Multiple consecutive wildcards (**) causes Out-of-memory
Date Wed, 07 Feb 2018 12:09:46 GMT
Hello list,

Whenever I make a query for ** (two consecutive wildcards) it causes my
Solr to run out of memory.


Why is that?

I realize that this is not a reasonable query to make, but the system
supports input from users, and they might by accident input this query,
causing Solr to crash.

I should add that we use the complexphrase query parser as the default
parser on a Solr 7.1.

Can anyone repro this or explain what causes the problem?

Thanks in advance,
Bjarke Buur Mortensen
Senior Software Engineer
Eluence A/S

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