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From "Ralph Romanos (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-4813) Problem using BulkOutputFormat while streaming several SSTables simultaneously from a given node.
Date Tue, 16 Oct 2012 08:59:03 GMT
Ralph Romanos created CASSANDRA-4813:
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             Summary: Problem using BulkOutputFormat while streaming several SSTables simultaneously
from a given node.
                 Key: CASSANDRA-4813
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4813
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 1.1.5, 1.1.3
         Environment: I am using SLES 10 SP3, 4 Cassandra + Hadoop nodes, 3 Hadoop only nodes
(datanodes/tasktrackers), 1 namenode/jobtracker. The machines used are Six-Core AMD Opteron(tm)
Processor 8431, 24 cores and 33 GB of RAM. I get the issue on both cassandra 1.1.3, 1.1.5
and I am using Hadoop 0.20.2.
            Reporter: Ralph Romanos


The issue occurs when streaming simultaneously SSTables from the same node to a cassandra
cluster using SSTableloader. It seems to me that Cassandra cannot handle receiving simultaneously
SSTables from the same node. However, when it receives simultaneously SSTables from two different
nodes, everything works fine. As a consequence, when using BulkOutputFormat to generate SSTables
and stream them to a cassandra cluster, I cannot use more than one reducer per node otherwise
I get a java.io.EOFException in the tasktracker's logs and a java.io.IOException: Broken pipe
in the Cassandra logs.

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