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From Rodrigo Felix <rodrigofelixdealme...@gmail.com>
Subject TimeoutException and keyspace exceptions
Date Tue, 30 Jul 2013 01:00:07 GMT
Hi,

   I'm running a heavy load with about 3200 clients accessing cassandra to
execute read and update queries via YCSB.
   At certain moment, YCSB starts throwing exceptions indefinitely like the
following:

*   [30/07/2013 00:04:50] Read Exception (Thread: 5007; Host:
10.191.54.26): TimedOutException()*
[30/07/2013 00:04:50] Read Exception (Thread: 4840; Host: 10.191.54.26):
TimedOutException()
*[30/07/2013 00:04:50] Read Exception (Thread: 5007; Host: 10.139.3.20):
InvalidRequestException(why:You have not set a keyspace for this session)*
[30/07/2013 00:04:50] Read Exception (Thread: 1644; Host: 10.191.54.26):
TimedOutException()

   I'm using Cassandra 1.1.5 in a cluster with 2 seeds and 2 other nodes
that I add (remove) on demand. Each node is a m1.large machine on Amazon.
   Any suggestion on what it could be?
   Unfortunately, upgrading the EC2 instance type is not an option for me.

Other info:
   rpc_timeout_in_ms: 30000
   thrift_framed_transport_size_in_mb: 60
   thrift_max_message_length_in_mb: 64

Att.

*Rodrigo Felix de Almeida*
LSBD - Universidade Federal do CearĂ¡
Project Manager
MBA, CSM, CSPO, SCJP

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