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From Brian O'Neill <b...@alumni.brown.edu>
Subject Re: OoM querying very wide-row in CLI
Date Wed, 28 Mar 2012 01:49:46 GMT
10-4.  I'll see if I can track it down and submit a pull request that
specifies a default if one does not exist.

-brian

---- 
Brian O'Neill
Lead Architect, Software Development
Health Market Science | 2700 Horizon Drive | King of Prussia, PA 19406
p: 215.588.6024blog: http://weblogs.java.net/blog/boneill42/
blog: http://brianoneill.blogspot.com/







On 3/27/12 9:45 PM, "Jonathan Ellis" <jbellis@gmail.com> wrote:

>I believe we added support for specifying a column range to the cli
>recently.  I don't know if there is a default limit.
>
>On Tue, Mar 27, 2012 at 8:40 PM, Brian O'Neill <bone@alumni.brown.edu>
>wrote:
>> 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/
>
>
>
>-- 
>Jonathan Ellis
>Project Chair, Apache Cassandra
>co-founder of DataStax, the source for professional Cassandra support
>http://www.datastax.com



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