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From "11 Nov." <nov.eleve...@gmail.com>
Subject Pipes example wordcount-nopipe.cc failed when reading from input splits
Date Mon, 03 Mar 2008 16:37:51 GMT
hi colleagues,
   I have set up the single node cluster to test pipes examples.
   wordcount-simple and wordcount-part work just fine. but wordcount-nopipe
can't run. Here is my commnad line:

 bin/hadoop pipes -conf src/examples/pipes/conf/word-nopipe.xml -input
input/ -output out-dir-nopipe1

and here is the error message printed on my console:

08/03/03 23:23:06 WARN mapred.JobClient: No job jar file set.  User classes
may not be found. See JobConf(Class) or JobConf#setJar(String).
08/03/03 23:23:06 INFO mapred.FileInputFormat: Total input paths to process
: 1
08/03/03 23:23:07 INFO mapred.JobClient: Running job: job_200803032218_0004
08/03/03 23:23:08 INFO mapred.JobClient:  map 0% reduce 0%
08/03/03 23:23:11 INFO mapred.JobClient: Task Id :
task_200803032218_0004_m_000000_0, Status : FAILED
java.io.IOException: pipe child exception
        at org.apache.hadoop.mapred.pipes.Application.abort(Application.java
        at org.apache.hadoop.mapred.pipes.PipesMapRunner.run(
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java
Caused by: java.io.EOFException
        at java.io.DataInputStream.readByte(DataInputStream.java:250)
        at org.apache.hadoop.io.WritableUtils.readVLong(WritableUtils.java
        at org.apache.hadoop.io.WritableUtils.readVInt(WritableUtils.java

task_200803032218_0004_m_000000_0: Hadoop Pipes Exception: failed to open
at /home/hadoop/hadoop-0.15.2-single-cluster
/src/examples/pipes/impl/wordcount-nopipe.cc:67 in

Could anybody tell me how to fix this? That will be appreciated.
Thanks a lot!

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