Releasing an E-MapReduce (EMR) cluster stops billing and permanently deletes the cluster. After a cluster is released, the data of the cluster cannot be recovered. Proceed with caution.
Releasing a cluster permanently deletes the data of the cluster. This action cannot be undone.
To reuse a cluster's configuration after releasing it, save the configuration as a cluster template before you release the cluster. For more information, see Create a cluster template. To create a cluster from a saved template, see Create a cluster based on a cluster template.
Prerequisites
Before you begin, ensure that:
Pay-as-you-go cluster: The cluster is in the Initializing, Running, or Idle state.
Subscription cluster: The cluster is in the Running or Startup Failed state, and no ECS instances exist in the cluster. To release ECS instances, see Release an instance.
Release protection is disabled for the cluster. For more information, see Enable and disable release protection.
Usage notes
Subscription clusters: Release all ECS instances in the cluster before releasing the cluster. If any ECS instance is stopped but not released, the cluster cannot be released. After all ECS instances are released, the EMR cluster is automatically released within 15 minutes.
If an ECS instance has a running task when it is released, the task fails.
Refunds: If you release ECS instances from a subscription cluster before it expires, the system refunds the fees for unused resources. To check your refund status, go to the Expenses and Costs console and choose Bills > Bill Details. For refund rules, see Refund policy.
Release a cluster
Log on to the EMR console. In the left-side navigation pane, click EMR on ECS.
In the top navigation bar, select the region and resource group for your cluster.
On the EMR on ECS page, find the cluster you want to release. Move the pointer over the
icon and select Release. Alternatively, click the cluster name to open the cluster details page, go to the Basic Information tab, and choose All Operations > Cluster Operation > Release in the upper-right corner.In the Release Cluster dialog, click OK.
FAQ
How do I reuse a cluster's configuration after releasing it?
Create a cluster template based on the cluster's configurations before you release it. After release, configurations cannot be recovered. For more information, see Create a cluster template. To create a new cluster from the template, see Create a cluster based on a cluster template.
You can also save a cluster's configuration as a template during cluster creation. For more information, see Create a cluster.