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POWhat is wrong with my boto elastic mapreduce jar jobflow parameters?
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2011-01-24T22:57:49.540
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I am using the boto library to create a job flow in Amazons Elastic MapReduce Webservice (EMR). The following code should create a step: <pre><code>step2 = JarStep(name='Find similiar items', jar='s3n://recommendertest/mahout-core/mahout-core-0.5-SNAPSHOT.jar', main_class='org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob', step_args=['s3n://bucket/output/' + run_id + '/aggregate_watched/', 's3n://bucket/output/' + run_id + '/similiar_items/', 'SIMILARITY_PEARSON_CORRELATION' ]) </code></pre> When I run the job flow, it always fails throwing this error: <pre><code>java.lang.NoClassDefFoundError: org/apache/hadoop/mapreduce/JobContext at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.apache.hadoop.util.RunJar.main(RunJar.java:148) at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapreduce.JobContext </code></pre> This is the line in the EMR logs invoking the java code: <pre><code>2011-01-24T22:18:54.491Z INFO Executing /usr/lib/jvm/java-6-sun/bin/java \ -cp /home/hadoop/conf:/usr/lib/jvm/java-6-sun/lib/tools.jar:/home/hadoop:/home/hadoop \ /hadoop-0.18-core.jar:/home/hadoop/hadoop-0.18-tools.jar:/home/hadoop/lib/*:/home/hadoop/lib/jetty-ext/* \ -Xmx1000m \ -Dhadoop.log.dir=/mnt/var/log/hadoop/steps/3 \ -Dhadoop.log.file=syslog \ -Dhadoop.home.dir=/home/hadoop \ -Dhadoop.id.str=hadoop \ -Dhadoop.root.logger=INFO,DRFA \ -Djava.io.tmpdir=/mnt/var/lib/hadoop/steps/3/tmp \ -Djava.library.path=/home/hadoop/lib/native/Linux-i386-32 \ org.apache.hadoop.mapred.JobShell \ /mnt/var/lib/hadoop/steps/3/mahout-core-0.5-SNAPSHOT.jar \ org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob \ s3n://..../output/job_2011-01-24_23:09:29/aggregate_watched/ \ s3n://..../output/job_2011-01-24_23:09:29/similiar_items/ \ SIMILARITY_PEARSON_CORRELATION </code></pre> What is wrong with the parameters? The java class definition can be found here: <a href="https://hudson.apache.org/hudson/job/Mahout-Quality/javadoc/org/apache/mahout/cf/taste/hadoop/similarity/item/ItemSimilarityJob.html" rel="nofollow">https://hudson.apache.org/hudson/job/Mahout-Quality/javadoc/org/apache/mahout/cf/taste/hadoop/similarity/item/ItemSimilarityJob.html</a>
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<python><hadoop><boto><mahout><amazon-emr>
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What is wrong with my boto elastic mapreduce jar jobflow parameters?
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