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From Eric Czech <e...@nextbigsound.com>
Subject Re: mmap segment underflow
Date Mon, 19 Sep 2011 23:34:39 GMT
Ok then I'll shutdown the server, change the access mode, restart, and
run scrub (and then change the access mode back).

Thanks for the pointers and I'll let you know how it goes one way or the other.

On Tue, Sep 20, 2011 at 12:29 AM, aaron morton <aaron@thelastpickle.com> wrote:
> 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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