Help Center/ MapReduce Service/ User Guide/ Managing Clusters/ Managing MRS Cluster Components/ Starting and Stopping an MRS Cluster Component
Updated on 2024-09-23 GMT+08:00
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Starting and Stopping an MRS Cluster Component

You can stop a service component in the MRS cluster as required. After the component is stopped, it will no longer offer any services.

  • Stop the services or abnormal services.
  • Start the service in the Stopped, Stop Failed, or Failed to Start state to use the service again.
  • Restart abnormal services or configure expired services to restore or enable the services.

Prerequisites

  • The IAM users have been synchronized in advance. You can do this by clicking Synchronize next to IAM User Sync on the Dashboard page of the cluster details.
  • You have logged in to MRS Manager. For how to log in, see Accessing MRS Manager.

Impact on the System

Services within the system rely on one another. Therefore, when you initiate, halt, or reboot a service, any services that depend on it will be impacted.

  • If a service is to be started, the lower-layer services dependent on it must be started first.
  • If a service is stopped, the upper-layer services dependent on it are unavailable.
  • If a service is restarted, the running upper-layer services dependent on it must be restarted.

Starting or Stopping a Component on the Console

  1. Log in to the MRS console.
  2. On the Active Clusters page, select a running cluster and click its name to switch to the cluster details page.
  3. On the MRS cluster details page, click Components.
  4. Locate the row that contains the target service and click Stop.

    Click Start to start the service if needed.

Starting or Stopping a Component on Manager

For MRS 3.x or later:

  1. Log in to Manager and choose Cluster > Services to access the service management page.

    The displayed service list contains all installed services in the cluster. If the tile view is selected, the services will be displayed in pane style. If you select the list view, the services will be displayed in a table.

    In this section, the Tile View is used by default.

  2. In the upper right corner of the specified service pane, choose > Stop Service, enter the password, and click OK.

    You can also click the name of the service to be operated, click Stop Service in the upper right corner of the Dashboard page, enter the password, confirm the operation impact, and click OK.

For MRS 2.x or earlier:

  1. Log in to Manager and click Services.
  2. Locate the row that contains the target service and click Stop.

    Click Start to start the service if needed.