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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: StorageProxy.mutate
Date Sun, 18 Jul 2010 12:42:26 GMT
UnavailableException means the node(s) with the requested data are
down.  A sub-case of this is when no nodes at all are known, which may
be what you are seeing.

On Sat, Jul 17, 2010 at 10:00 PM, Mubarak Seyed <mubarak.seyed@gmail.com> wrote:
> I am trying to load data using contrib/client_only/ClientOnlyExample.java to
> write mutations using
> StorageProxy.mutate().
> When i run the ClientOnlyExample.class with write option against single node
> server, it prints as if key has written, and shutting down the message
> service, i had to kill the JVM (as documented)
> When i try to read data using same key values, i am getting
> 19:54:01,618 DEBUG DatabaseDescriptor:213 - Syncing log with a period of
> 10000
> 19:54:01,624  INFO DatabaseDescriptor:229 - Auto DiskAccessMode determined
> to be mmap
> 19:54:01,772 DEBUG DatabaseDescriptor:401 - setting autoBootstrap to false
> 19:54:02,292 DEBUG StorageProxy:347 - weakreadremote reading
> SliceByNamesReadCommand(table='Keyspace1', key='key0',
> columnParent='QueryPath(columnFamilyName='Standard1',
> superColumnName='null', columnName='null')', columns=[636f6c62,])
> Exception in thread "main" java.lang.RuntimeException:
> UnavailableException()
> at ClientOnlyExample.testReading(ClientOnlyExample.java:118)
> at ClientOnlyExample.main(ClientOnlyExample.java:156)
> Caused by: UnavailableException()
> at
> org.apache.cassandra.service.StorageService.findSuitableEndPoint(StorageService.java:1203)
> at
> org.apache.cassandra.service.StorageProxy.weakReadRemote(StorageProxy.java:354)
> at
> org.apache.cassandra.service.StorageProxy.readProtocol(StorageProxy.java:409)
> at ClientOnlyExample.testReading(ClientOnlyExample.java:102)
> ... 1 more
> How can i make sure that StorageProxy.mutate(List<RowMutation>) works fine?
> --
> Thanks,
> Mubarak Seyed.
>



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

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