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From PJunk <pajgaon...@rhapsody.com>
Subject Getting HexToBytes Error while reading from Cassandra
Date Thu, 16 Feb 2012 18:00:28 GMT

Hello,

We are trying to read data from cassandra via pig. The version of cassandra is 
1.0.7 and pig is 0.9.0.

We get the following error when we try to load the data from the cassandra 
keyspace and columnfamily.

 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2997: Unable to recreate 
exception from backed error: Error: 
org.apache.cassandra.utils.FBUtilities.hexToBytes(Ljava/lang/String;)[B


Following is the pig script:

register /var/pig-0.9.0/lib/pygmalion-1.0.0.jar;

define FromCassandraBag org.pygmalion.udf.FromCassandraBag();

rows = LOAD 'cassandra://Keyspace/ColumnFamily'
       USING org.apache.cassandra.hadoop.pig.CassandraStorage()
       AS (key, columns: bag {T: tuple(columnname, value)}) ;

DUMP rows;


The Cassandra Columnfamily looks like:

 Key Validation Class: org.apache.cassandra.db.marshal.UTF8Type
      Default column value validator: org.apache.cassandra.db.marshal.BytesType
      Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type
      Row cache size / save period in seconds / keys to save : 0.0/0/all
      Row Cache Provider: 
org.apache.cassandra.cache.ConcurrentLinkedHashCacheProvider
      Key cache size / save period in seconds: 200000.0/14400
      GC grace seconds: 864000
      Compaction min/max thresholds: 4/32
      Read repair chance: 1.0
      Replicate on write: false
      Bloom Filter FP chance: default
      Built indexes: []
      Compaction Strategy: 
org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy

Has anyone come across this error and have a solution?

Any help is appreciated.

Thanks





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