Implementing a Java action job using Oozie
In the previous recipe, we talked about how to use Oozie to execute the Map Reduce job. In this recipe, we are going to take a look at how to execute any Java class using Oozie.
Getting ready
To perform this recipe, you should have a running Hadoop cluster as well as the latest version of Oozie installed on it.
How to do it
Any Oozie job execution consists of two important things, workflow.xml and a properties file. The workflow.xml is where we need to specify the flow of execution. The following is an example of workflow.xml, which uses a Java action. Here, we need to provide the jar file in which the code is present:
<workflow-app xmlns="uri:oozie:workflow:0.2" name="java-main-wf">
<start to="java-node"/>
<action name="java-node">
<java>
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<configuration>
<property>
<name>mapred.job.queue.name</name>
<...
