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From <>
Subject BulkOutputFormat error - org.apache.thrift.transport.TTransportException
Date Thu, 13 Dec 2012 20:57:19 GMT

I am a newbie to Cassandra. Was trying out a sample (word count) code on BulkOutputFormat
and got stuck with an error.

What I am trying to do is - migrate all Hive tables (from Hadoop cluster) to Cassandra column
My MR program is configured to run on Hadoop cluster v 0.20.2 (cdh3u3) by pointing job config
params '' and 'mapred.job.tracker' appropriately.
The output is pointed to my local Cassandra v1.1.7.
Have set the following params for writing to Cassandra:
conf.set("cassandra.output.keyspace", "Customer");
       conf.set("cassandra.output.columnfamily", "words");
       conf.set("cassandra.output.partitioner.class", "org.apache.cassandra.dht.RandomPartitioner");
       conf.set("cassandra.output.thrift.port","9160");    // default
       conf.set("cassandra.output.thrift.address", "localhost");
       conf.set("mapreduce.output.bulkoutputformat.streamthrottlembits", "10");

But, programs fails with the below error:
12/12/13 15:32:55 INFO security.UserGroupInformation: JAAS Configuration already set up for
Hadoop, not re-installing.
Cassandra thrift address   :      localhost
Cassandra thrift port      :      9160
12/12/13 15:32:56 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments.
Applications should implement Tool for the same.
12/12/13 15:34:21 INFO input.FileInputFormat: Total input paths to process : 1
12/12/13 15:34:21 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your
platform... using builtin-java classes where applicable
12/12/13 15:34:21 WARN snappy.LoadSnappy: Snappy native library not loaded
12/12/13 15:34:22 INFO mapred.JobClient: Running job: job_201212111101_4622
12/12/13 15:34:23 INFO mapred.JobClient:  map 0% reduce 0%
12/12/13 15:34:28 INFO mapred.JobClient:  map 100% reduce 0%
12/12/13 15:34:37 INFO mapred.JobClient:  map 100% reduce 33%
12/12/13 15:34:39 INFO mapred.JobClient: Task Id : attempt_201212111101_4622_r_000000_0, Status
java.lang.RuntimeException: Could not retrieve endpoint ranges:
       at org.apache.cassandra.hadoop.BulkRecordWriter$ExternalClient.init(
       at org.apache.cassandra.hadoop.BulkRecordWriter.close(
       at org.apache.cassandra.hadoop.BulkRecordWriter.close(
       at org.apache.hadoop.mapred.ReduceTask.runNewReducer(
       at org.apache.hadoop.mapred.Child$
       at Method)
       at org.apache.hadoop.mapred.Child.main(
Caused by: org.apache.thrift.transport.TTransportException:

Please help me out understand the problem.

Anand B


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