<p>SetTerminationProtection locks a cluster (job flow) so the EC2 instances in the cluster cannot be terminated by user intervention, an API call, or in the event of a job-flow error. The cluster still terminates upon successful completion of the job flow. Calling <code>SetTerminationProtection</code> on a cluster is similar to calling the Amazon EC2 <code>DisableAPITermination</code> API on all EC2 instances in a cluster.</p> <p> <code>SetTerminationProtection</code> is used to prevent accidental termination of a cluster and to ensure that in the event of an error, the instances persist so that you can recover any data stored in their ephemeral instance storage.</p> <p> To terminate a cluster that has been locked by setting <code>SetTerminationProtection</code> to <code>true</code>, you must first unlock the job flow by a subsequent call to <code>SetTerminationProtection</code> in which you set the value to <code>false</code>. </p> <p> For more information, see<a href="https://docs.aws.amazon.com/emr/latest/ManagementGuide/UsingEMR_TerminationProtection.html">Managing Cluster Termination</a> in the <i>Amazon EMR Management Guide</i>. </p>

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