Matthias, it works! Thanks a lot. Johnny
On Tue, Nov 27, 2012 at 11:34 PM, Matthias Friedrich <[email protected]> wrote: > Hi, > > I think you have to download the source distribution and build the JARs > for Hadoop 2: > > $ mvn clean install -Dcrunch.platform=2 -DskipTests > > Does it work then? > > Regards, > Matthias > > On Tuesday, 2012-11-27, Johnny Zhang wrote: > > Hi, All: > > I am trying to run Crunch 0.4.0 with Hadoop 2.0.0. I got the error below: > > > > Exception in thread "main" java.lang.IncompatibleClassChangeError: Found > > interface org.apache.hadoop.mapreduce.JobContext, but class was expected > > at > > > org.apache.crunch.hadoop.mapreduce.lib.output.CrunchMultipleOutputs.getNamedOutputsList(CrunchMultipleOutputs.java:210) > > at > > > org.apache.crunch.hadoop.mapreduce.lib.output.CrunchMultipleOutputs.checkNamedOutputName(CrunchMultipleOutputs.java:197) > > at > > > org.apache.crunch.hadoop.mapreduce.lib.output.CrunchMultipleOutputs.addNamedOutput(CrunchMultipleOutputs.java:256) > > at > > > org.apache.crunch.io.impl.FileTargetImpl.configureForMapReduce(FileTargetImpl.java:65) > > at > > > org.apache.crunch.io.text.TextFileTarget.configureForMapReduce(TextFileTarget.java:70) > > at > > > org.apache.crunch.impl.mr.plan.MSCROutputHandler.configure(MSCROutputHandler.java:63) > > at > org.apache.crunch.io.impl.FileTargetImpl.accept(FileTargetImpl.java:71) > > at > > > org.apache.crunch.io.impl.SourceTargetImpl.accept(SourceTargetImpl.java:58) > > at > > > org.apache.crunch.impl.mr.plan.MSCROutputHandler.configureNode(MSCROutputHandler.java:51) > > at > org.apache.crunch.impl.mr.plan.JobPrototype.build(JobPrototype.java:138) > > at > > > org.apache.crunch.impl.mr.plan.JobPrototype.getCrunchJob(JobPrototype.java:114) > > at org.apache.crunch.impl.mr.plan.MSCRPlanner.plan(MSCRPlanner.java:111) > > at org.apache.crunch.impl.mr.MRPipeline.plan(MRPipeline.java:144) > > at org.apache.crunch.impl.mr.MRPipeline.run(MRPipeline.java:154) > > at org.apache.crunch.impl.mr.MRPipeline.done(MRPipeline.java:183) > > at org.apache.crunch.examples.WordCount.run(WordCount.java:70) > > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) > > at org.apache.crunch.examples.WordCount.main(WordCount.java:76) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at > > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at org.apache.hadoop.util.RunJar.main(RunJar.java:208) > > > > Looks like JobContext is expected a class, but Hadoop 2.0.0 change it to > a > > interface. > > > > Does anyone has the similar experience? Any suggestion? Thanks a lot. > > > > Johnny Zhang >
