YARN-8845. Removed unused hadoop.registry.rm reference.
Contributed by Íñigo Goiri
This commit is contained in:
Eric Yang
parent
d5dd6f31fc
commit
bf04f19456
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@ -2753,22 +2753,6 @@
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<!-- YARN registry -->
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<property>
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<name>hadoop.registry.rm.enabled</name>
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<value>false</value>
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<description>
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Is the registry enabled in the YARN Resource Manager?
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If true, the YARN RM will, as needed.
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create the user and system paths, and purge
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service records when containers, application attempts
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and applications complete.
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If false, the paths must be created by other means,
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and no automatic cleanup of service records will take place.
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</description>
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</property>
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<property>
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<name>hadoop.registry.zk.root</name>
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<value>/registry</value>
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@ -50,17 +50,6 @@ public interface RegistryConstants {
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*/
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String DNS_PREFIX = REGISTRY_PREFIX + "dns.";
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/**
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* flag to indicate whether or not the registry should
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* be enabled in the RM: {@value}.
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*/
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String KEY_REGISTRY_ENABLED = REGISTRY_PREFIX + "rm.enabled";
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/**
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* Defaut value for enabling the registry in the RM: {@value}.
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*/
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boolean DEFAULT_REGISTRY_ENABLED = false;
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/**
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* flag to indicate whether or not the registry should
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* be enabled in the RM: {@value}.
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@ -36,51 +36,6 @@ the values, so enabling them to read from and potentially write to the registry.
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## Core Settings
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### Enabling the Registry in the Resource Manager
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The Resource Manager manages user directory creation and record cleanup
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on YARN container/application attempt/application completion.
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```
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<property>
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<description>
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Is the registry enabled in the YARN Resource Manager?
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If true, the YARN RM will, as needed.
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create the user and system paths, and purge
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service records when containers, application attempts
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and applications complete.
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If false, the paths must be created by other means,
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and no automatic cleanup of service records will take place.
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</description>
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<name>hadoop.registry.rm.enabled</name>
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<value>false</value>
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</property>
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```
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If the property is set in `core-site.xml` or `yarn-site.xml`,
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the YARN Resource Manager will behave as follows:
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1. On startup: create the initial root paths of `/`, `/services` and `/users`.
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On a secure cluster, access will be restricted to the system accounts (see below).
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2. When a user submits a job: create the user path under `/users`.
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3. When a container is completed: delete from the registry all service records
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with a `yarn:persistence` field of value `container`, and a `yarn:id` field
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whose value matches the ID of the completed container.
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4. When an application attempt is completed: remove all service records with
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`yarn:persistence` set to `application-attempt` and `yarn:id` set to the
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pplication attempt ID.
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5. When an application finishes: remove all service records with
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`yarn:persistence` set to `application` and `yarn:id` set to the
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application ID.
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All these operations are asynchronous, so that zookeeper connectivity problems
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do not delay RM operations or work scheduling.
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If the property `hadoop.registry.rm.enabled` is set to `false`, the RM will
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not interact with the registry —and the listed operations will not take place.
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The root paths may be created by other means, but service record cleanup will not take place.
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### Setting the Zookeeper Quorum: `hadoop.registry.zk.quorum`
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This is an essential setting: it identifies the lists of zookeeper hosts
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@ -326,17 +281,6 @@ concluding that the quorum is unreachable and failing.
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```
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<!-- YARN registry -->
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<property>
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<description>
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Is the registry enabled: does the RM start it up,
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create the user and system paths, and purge
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service records when containers, application attempts
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and applications complete
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</description>
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<name>hadoop.registry.rm.enabled</name>
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<value>false</value>
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</property>
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<property>
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<description>
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A comma separated list of hostname:port pairs defining the
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@ -379,21 +379,6 @@ lack this string before attempting to parse the data with a JSON parser.
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### YARN Persistence policies
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The YARN Resource Manager integration integrates cleanup of service records
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as an application, attempt or container is completed.
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This allows service to register entries which have a lifespan bound to one of
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these aspects of YARN applications' lifecycles. This is a feature which is only
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supported when the RM has had its registry integration enabled via the
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configuration option `hadoop.registry.rm.enabled`.
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If this option is enabled, and the YARN resource manager is running,
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it will clean up service records as defined
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below.
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If the option is disabled, the RM does not provide any registry support at all.
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The attributes, `yarn:id` and `yarn:persistence` specify which records
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*and any child entries* may be deleted as the associated YARN components complete.
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