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https://issues.apache.org/jira/browse/OOZIE-1723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rohini Palaniswamy resolved OOZIE-1723.
---------------------------------------
Resolution: Not A Problem
https://cwiki.apache.org/confluence/display/OOZIE/Map+Reduce+Cookbook
To run MapReduce jobs written using the new API in Oozie, below are the changes
you need to make in workflow.xml.
# change mapred.mapper.class to mapreduce.map.class
# change mapred.reducer.class to mapreduce.reduce.class
# add mapred.output.key.class
# add mapred.output.value.class
# and, include the following property into MR action configuration
{code}
<property>
<name>mapred.reducer.new-api</name>
<value>true</value>
</property>
<property>
<name>mapred.mapper.new-api</name>
<value>true</value>
</property>
{code}
> Setting 'use.new.api=true' gives compatibility error even with using new
> 'mapreduce.*' hadoop api
> -------------------------------------------------------------------------------------------------
>
> Key: OOZIE-1723
> URL: https://issues.apache.org/jira/browse/OOZIE-1723
> Project: Oozie
> Issue Type: Bug
> Affects Versions: trunk, 4.0.0
> Reporter: Mona Chitnis
> Labels: api
>
> Error encountered - JA009: mapred.mapper.class is incompatible with new map
> API mode.
> complete stack trace:
> {code}
> org.apache.oozie.action.ActionExecutorException: JA009: mapred.mapper.class
> is incompatible with new map API mode.
> at
> org.apache.oozie.action.ActionExecutor.convertExceptionHelper(ActionExecutor.java:412)
> at
> org.apache.oozie.action.ActionExecutor.convertException(ActionExecutor.java:396)
> at
> org.apache.oozie.action.hadoop.JavaActionExecutor.submitLauncher(JavaActionExecutor.java:871)
> at
> org.apache.oozie.action.hadoop.JavaActionExecutor.start(JavaActionExecutor.java:1025)
> at
> org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:217)
> at
> org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:62)
> at org.apache.oozie.command.XCommand.call(XCommand.java:280)
> at
> org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:326)
> at
> org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:255)
> at
> org.apache.oozie.service.CallableQueueService$CallableWrapper.run(CallableQueueService.java:175)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.io.IOException: mapred.mapper.class is incompatible with new
> map API mode.
> at org.apache.hadoop.mapreduce.Job.ensureNotSet(Job.java:1122)
> at org.apache.hadoop.mapreduce.Job.setUseNewAPI(Job.java:1149)
> at org.apache.hadoop.mapreduce.Job.submit(Job.java:1211)
> at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:573)
> {code}
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