[MAHOUT-822] Mahout needs to be made compatible with Hadoop .23 releases

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.6
• Fix Version/s: 0.7
• Component/s: build-classic
• Labels: bigtop
• Assignee: Tom Pierce
• Reporter: Roman Shaposhnik
• Created: 29/Sep/11 22:37
• Updated: 14/Feb/13 23:26
• Resolved: 12/Mar/12 19:19

Description

As part of the Hadoop stack integration project (Apache Bigtop) we are now trying to compile Mahout's upcoming 0.6 release against Hadoop 0.22 and 0.23.

I'm attaching the patch to Mahout's Maven build system that made it possible. I would also like to request help in solving the real issues that poped
up when we tried to compile Mahout: http://bigtop01.cloudera.org:8080/job/Bigtop-hadoop22/COMPONENT=mahout,label=centos5/6/console

[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/Step0JobTest.java:[182,33] org.apache.hadoop.mapreduce.TaskAttemptContext is abstract; cannot be instantiated
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/Step0JobTest.java:[218,9] org.apache.mahout.df.mapreduce.partial.Step0JobTest.Step0Context is not abstract and does not override abstract method getInputSplit() in org.apache.hadoop.mapreduce.MapContext
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/Step0JobTest.java:[229,12] cannot find symbol
[ERROR] symbol  : constructor Context(org.apache.hadoop.conf.Configuration,org.apache.hadoop.mapreduce.TaskAttemptID,<nulltype>,<nulltype>,<nulltype>,<nulltype>,<nulltype>)
[ERROR] location: class org.apache.hadoop.mapreduce.Mapper.Context
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/common/DummyRecordWriter.java:[68,18] org.apache.hadoop.mapreduce.Mapper.Context is abstract; cannot be instantiated
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/common/DummyRecordWriter.java:[77,19] org.apache.hadoop.mapreduce.Reducer.Context is abstract; cannot be instantiated
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/PartialSequentialBuilder.java:[110,30] org.apache.hadoop.mapreduce.TaskAttemptContext is abstract; cannot be instantiated
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/PartialSequentialBuilder.java:[206,28] org.apache.hadoop.mapreduce.JobContext is abstract; cannot be instantiated
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/PartialSequentialBuilder.java:[227,30] org.apache.hadoop.mapreduce.TaskAttemptContext is abstract; cannot be instantiated
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/MockContext.java:[30,6] org.apache.mahout.df.mapreduce.partial.MockContext is not abstract and does not override abstract method getInputSplit() in org.apache.hadoop.mapreduce.MapContext
[ERROR] /mnt/jenkins/workspace/workspace/Bigtop-hadoop22/COMPONENT/mahout/label/centos5/build/mahout/rpm/BUILD/apache-mahout-c298f70/core/src/test/java/org/apache/mahout/df/mapreduce/partial/MockContext.java:[38,10] cannot find symbol

Issue Links

• relates to: MRUNIT-31 Support Hadoop 0.22 and 0.23
• relates to: MAHOUT-950 Change BtJob to use new MultipleOutputs API