Hi
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 families.
My MR program is configured to run on Hadoop cluster v 0.20.2 (cdh3u3) by
pointing job config params 'fs.default.name' 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 : FAILED
java.lang.RuntimeException: Could not retrieve endpoint ranges:
at
org.apache.cassandra.hadoop.BulkRecordWriter$ExternalClient.init(BulkRecordWriter.java:328)
at
org.apache.cassandra.io.sstable.SSTableLoader.stream(SSTableLoader.java:116)
at
org.apache.cassandra.io.sstable.SSTableLoader.stream(SSTableLoader.java:111)
at
org.apache.cassandra.hadoop.BulkRecordWriter.close(BulkRecordWriter.java:223)
at
org.apache.cassandra.hadoop.BulkRecordWriter.close(BulkRecordWriter.java:208)
at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:573)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:414)
at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157)
at org.apache.hadoop.mapred.Child.main(Child.java:264)
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectE
Please help me out understand the problem.
Regards
Anand B
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