hadoop SubClusterState 源码
haddop SubClusterState 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/federation/store/records/SubClusterState.java
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.apache.hadoop.yarn.server.federation.store.records;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* <p>
* State of a <code>SubCluster</code>.
* </p>
*/
@Private
@Unstable
public enum SubClusterState {
/** Newly registered subcluster, before the first heartbeat. */
SC_NEW,
/** Subcluster is registered and the RM sent a heartbeat recently. */
SC_RUNNING,
/** Subcluster is unhealthy. */
SC_UNHEALTHY,
/** Subcluster is in the process of being out of service. */
SC_DECOMMISSIONING,
/** Subcluster is out of service. */
SC_DECOMMISSIONED,
/** RM has not sent a heartbeat for some configured time threshold. */
SC_LOST,
/** Subcluster has unregistered. */
SC_UNREGISTERED;
public boolean isUnusable() {
return (this != SC_RUNNING && this != SC_NEW);
}
public boolean isActive() {
return this == SC_RUNNING;
}
public boolean isFinal() {
return (this == SC_UNREGISTERED || this == SC_DECOMMISSIONED
|| this == SC_LOST);
}
public static final Logger LOG =
LoggerFactory.getLogger(SubClusterState.class);
/**
* Convert a string into {@code SubClusterState}.
*
* @param state the string to convert in SubClusterState
* @return the respective {@code SubClusterState}
*/
public static SubClusterState fromString(String state) {
try {
return SubClusterState.valueOf(state);
} catch (Exception e) {
LOG.error("Invalid SubCluster State value({}) in the StateStore does not"
+ " match with the YARN Federation standard.", state);
return null;
}
}
}
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