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From aaron morton <aa...@thelastpickle.com>
Subject Re: mmap segment underflow
Date Mon, 19 Sep 2011 23:29:15 GMT
I've also found it useful to disable memmapped file access until the scrub is complete by adding
this to the yaml

disk_access_mode: standard

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com

On 20/09/2011, at 6:55 AM, Jonathan Ellis wrote:

> You should start with scrub.
> 
> On Mon, Sep 19, 2011 at 1:04 PM, Eric Czech <eric@nextbigsound.com> wrote:
>> I'm getting a lot of errors that look something like "java.io.IOError:
>> java.io.IOException: mmap segment underflow; remaining is 348268797
>> but 892417075 requested" on one node in a 10 node cluster.  I'm
>> currently running version 0.8.4 but this is data that was carried over
>> from much earlier versions.  Should I try to run scrub or are there
>> any other general guidelines for dealing with this sort of error?
>> 
>> Thanks everyone!
>> 
> 
> 
> 
> -- 
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com


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