org.apache.flink.yarn.YarnClientYarnClusterInformationRetriever Maven / Gradle / Ivy
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* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.flink.yarn;
import org.apache.flink.util.FlinkException;
import org.apache.hadoop.yarn.api.records.NodeState;
import org.apache.hadoop.yarn.client.api.YarnClient;
import org.apache.hadoop.yarn.exceptions.YarnException;
import java.io.IOException;
/**
* {@link YarnClusterInformationRetriever} implementation which queries the Yarn cluster using a
* {@link YarnClient} instance.
*/
public final class YarnClientYarnClusterInformationRetriever
implements YarnClusterInformationRetriever {
private final YarnClient yarnClient;
private YarnClientYarnClusterInformationRetriever(YarnClient yarnClient) {
this.yarnClient = yarnClient;
}
@Override
public int getMaxVcores() throws FlinkException {
try {
return yarnClient.getNodeReports(NodeState.RUNNING).stream()
.mapToInt(report -> report.getCapability().getVirtualCores())
.max()
.orElse(0);
} catch (YarnException | IOException e) {
throw new FlinkException(
"Couldn't get cluster description, please check on the YarnConfiguration", e);
}
}
public static YarnClientYarnClusterInformationRetriever create(YarnClient yarnClient) {
return new YarnClientYarnClusterInformationRetriever(yarnClient);
}
}