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From "Brian O'Neill" <b...@alumni.brown.edu>
Subject OoM querying very wide-row in CLI
Date Wed, 28 Mar 2012 01:40:35 GMT
Today, running 1.0.7, we saw a node crash with an OutOfMemory.
We have a single row with ~10million columns in it. (using it as an index)
Accidentally, we attempted to list the CF in CLI that had the wide-row.
 This caused the CLI to hang and then eventually crashed Cassandra with an
OoM.

I know this is a case of "If it hurts when you do that, don't do that", but
we may want to better protect against it in the CLI and/or the DB.  I know
we limit row counts on lists in CLI.  Do we also limit column counts?  If
not, I don't mind submitting a patch for this.

let me know,
brian

-- 
Brian ONeill
Lead Architect, Health Market Science (http://healthmarketscience.com)
mobile:215.588.6024
blog: http://weblogs.java.net/blog/boneill42/
blog: http://brianoneill.blogspot.com/

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