/*
* 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.ambari.server.checks;
import java.util.Arrays;
import java.util.Map;
import org.apache.ambari.server.AmbariException;
import org.apache.ambari.server.ServiceComponentNotFoundException;
import org.apache.ambari.server.controller.PrereqCheckRequest;
import org.apache.ambari.server.state.Cluster;
import org.apache.ambari.server.state.Service;
import org.apache.ambari.server.state.ServiceComponent;
import org.apache.ambari.server.state.ServiceComponentHost;
import org.apache.ambari.server.state.stack.PrereqCheckStatus;
import org.apache.ambari.server.state.stack.PrerequisiteCheck;
import com.google.inject.Singleton;
/**
* The {@link HiveMultipleMetastoreCheck} checks that there are at least 2 Hive
* Metastore instances in the cluster.
*/
@Singleton
@UpgradeCheck(group = UpgradeCheckGroup.MULTIPLE_COMPONENT_WARNING, order = 20.1f)
public class HiveMultipleMetastoreCheck extends AbstractCheckDescriptor {
/**
* Constructor.
*/
public HiveMultipleMetastoreCheck() {
super(CheckDescription.SERVICES_HIVE_MULTIPLE_METASTORES);
}
/**
* {@inheritDoc}
*/
@Override
public boolean isApplicable(PrereqCheckRequest request) throws AmbariException {
return super.isApplicable(request, Arrays.asList("HIVE"), true);
}
/**
* {@inheritDoc}
*/
@Override
public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException {
final String clusterName = request.getClusterName();
final Cluster cluster = clustersProvider.get().getCluster(clusterName);
try {
Service hive = cluster.getService("HIVE");
ServiceComponent metastore = hive.getServiceComponent("HIVE_METASTORE");
Map<String, ServiceComponentHost> metastores = metastore.getServiceComponentHosts();
if (metastores.size() < 2) {
prerequisiteCheck.getFailedOn().add("HIVE");
prerequisiteCheck.setStatus(PrereqCheckStatus.WARNING);
prerequisiteCheck.setFailReason(getFailReason(prerequisiteCheck, request));
}
} catch (ServiceComponentNotFoundException scnfe) {
prerequisiteCheck.getFailedOn().add("HIVE");
prerequisiteCheck.setStatus(PrereqCheckStatus.WARNING);
prerequisiteCheck.setFailReason(getFailReason(prerequisiteCheck, request));
}
}
}