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From Sonny Heer <>
Subject Timeouts running batch_mutate
Date Fri, 14 May 2010 16:55:58 GMT

I'm running a map/reduce job, reading from HDFS directory, and
reducing to Cassandra using the batch_mutate method.

The reducer builds the list of rowmutations for a single row, and
calls batch_mutate at the end.  As I move to a larger dataset, i'm
seeing the following exception:

Caused by: TimedOutException()
        at org.apache.cassandra.thrift.Cassandra$
        at org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(
        at org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(

I changed the RpcTimeoutInMillis to 60 seconds with no changes.  What
configuration changes should i make when doing intensive write
operations using batch mutate?

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