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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Cause possible for a "cound not connect" TTransportException.NOT_OPEN , during load datas ?
Date Thu, 20 May 2010 21:06:59 GMT
"disseminating load info" is not related to your problem.

certainly you should be using connection pooling rather than opening a
ton of sockets.

You didn't say what CL you are using, but you should not use CL.ZERO
for load tests.

On Thu, May 20, 2010 at 11:14 AM, xavier manach <xav@tekio.org> wrote:
> Hi.
>
>   I am neebie in Cassandra. I study and compare performance of databases for
> choose my future architecture.
>
>   I try to load a lot of datas in cassandra.
> I use python with protocol thrift (very simple, whithout threading)
> I do sequentials requests : client.batch_mutate and client.get_slice.
> (around 1M mutate y 0.3M get mixed for 10 columns family)
> I didn't wait between each request.
> I use only one node (I have the same probleme with 2 nodes)
>
>   It's start fine, but in the middle of the load
> during  an  transport.open()
> I have this exception  :
>   TTransportException.NOT_OPEN error
> with the message : could not connect to <IP>:<PORT>
>
>   The server didn't respond for seconds ( between 1 and 30)
> After,  it's work again...
>
>   I turn the log to DEBUG,
> When the server did'nt respond, I have this message :
>   Disseminating load info...
>  Whats mean this ?
>
>   I had forget something ? What is wrong ?
> How avoid it ?
>
>
> Thanks for your help.
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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