The -config option refers to a local Java properties file containing definitions for the parameters in the workflow XML file, as well as oozie.wf.application.path, which tells Oozie the location of the workflow application in HDFS.Įxample contents of the properties file: nameNode=hdfs://localhost:8020 Run workflow job using- % oozie job -config ch05/src/main/resources/max-temp-workflow.properties -run Export OOZIE_URL environment variable which tells the oozie command which Oozie server to use (here we’re using one running locally): % export OOZIE_URL=" 2. To run this, we will use the Oozie command-line tool (a client program which communicates with the Oozie server).ġ.
#HIVE PIGG OOZIE PROJECTS TASKS HOW TO#
In this section, we will see how to run a workflow job. Such a build need to be copied to HDFS using a command, for example – % hadoop fs -put hadoop-examples/target/ name of workflow Workflow application conforming to this layout can be built with any build tool e.g., Ant or Maven. Lib directory contains Jar files containing MapReduce classes. It is necessary to keep workflow.xml (a workflow definition file) in the top level directory (parent directory with workflow name). Applications need to follow a simple directory structure and are deployed to HDFS so that Oozie can access them.Īn example directory structure is shown below- / Packaging and deploying an Oozie workflow applicationĪ workflow application consists of the workflow definition and all the associated resources such as MapReduce Jar files, Pig scripts etc. Entry-to or exit from an action node may also trigger the callback.
#HIVE PIGG OOZIE PROJECTS TASKS UPDATE#
Start Node, designates the start of the workflow job.Įrror Node designates the occurrence of an error and corresponding error message to be printed.Īt the end of execution of a workflow, HTTP callback is used by Oozie to update the client with the workflow status. Start Node, End Node, and Error Node fall under this category of nodes. Oozie workflow consists of action nodes and control-flow nodes.Īn action node represents a workflow task, e.g., moving files into HDFS, running a MapReduce, Pig or Hive jobs, importing data using Sqoop or running a shell script of a program written in Java.Ī control-flow node controls the workflow execution between actions by allowing constructs like conditional logic wherein different branches may be followed depending on the result of earlier action node.
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