Github user rjurney commented on the pull request:
https://github.com/apache/spark/pull/455#issuecomment-50420550
@ericgarcia I am running CDH 4.4 with mapreduce 1, and when I run this on a
cluster running Spark master in standalone mode:
avroRdd =
sc.newAPIHadoopFile("hdfs://hivecluster2:8020/e8/dev/web_proxy_mef/2014/07/28",
"org.apache.avro.mapreduce.AvroKeyInputFormat",
"org.apache.avro.mapred.AvroKey",
"org.apache.hadoop.io.NullWritable",
keyConverter="org.apache.spark.examples.pythonconverters.AvroGenericConverter")
The error is the well known hadoop 1 vs hadoop 2 issue.
Py4JJavaError: An error occurred while calling
z:org.apache.spark.api.python.PythonRDD.newAPIHadoopFile.
: org.apache.hadoop.ipc.RemoteException: Server IPC version 7 cannot
communicate with client version 4
So I also tried hadoopFile, instead of newAPIHadoopFile. I run:
avroRdd =
sc.hadoopFile("hdfs://hivecluster2:8020/e8/dev/web_proxy_mef/2014/07/28/20/part-m-00000.avro",
"org.apache.avro.mapreduce.AvroKeyInputFormat",
"org.apache.avro.mapred.AvroKey",
"org.apache.hadoop.io.NullWritable",
keyConverter="org.apache.spark.examples.pythonconverters.AvroGenericConverter")
And I get:
Py4JJavaError: An error occurred while calling
z:org.apache.spark.api.python.PythonRDD.hadoopFile.
: java.lang.ClassCastException:
org.apache.avro.mapreduce.AvroKeyInputFormat cannot be cast to
org.apache.hadoop.mapred.InputFormat
What am I to do? :(
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