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AddJobFlowSteps adds new steps to a running cluster. A maximum of 256 steps are allowed in each job flow.
If your cluster is long-running (such as a Hive data warehouse) or complex, you may require more than 256 steps to process your data. You can bypass the 256-step limitation in various ways, including using SSH to connect to the master node and submitting queries directly to the software running on the master node, such as Hive and Hadoop.
A step specifies the location of a JAR file stored either on the master node of the cluster or in Amazon S3. Each step is performed by the main function of the main class of the JAR file. The main class can be specified either in the manifest of the JAR or by using the MainFunction parameter of the step.
Amazon EMR executes each step in the order listed. For a step to be considered complete, the main function must exit with a zero exit code and all Hadoop jobs started while the step was running must have completed and run successfully.
You can only add steps to a cluster that is in one of the following states: STARTING, BOOTSTRAPPING, RUNNING, or WAITING.
The string values passed into HadoopJarStep object cannot exceed a total of
10240 characters.
For .NET Core this operation is only available in asynchronous form. Please refer to AddJobFlowStepsAsync.
Namespace: Amazon.ElasticMapReduce
Assembly: AWSSDK.ElasticMapReduce.dll
Version: 3.x.y.z
public abstract AddJobFlowStepsResponse AddJobFlowSteps( AddJobFlowStepsRequest request )
Container for the necessary parameters to execute the AddJobFlowSteps service method.
| Exception | Condition |
|---|---|
| InternalServerErrorException | Indicates that an error occurred while processing the request and that the request was not completed. |
.NET Framework:
Supported in: 4.5 and newer, 3.5