/**
* 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.hadoop.hdfs.server.namenode.ha;
import static org.junit.Assert.fail;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ha.HealthCheckFailedException;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Test;
import org.mockito.Mockito;
public class TestNNHealthCheck {
@Test
public void testNNHealthCheck() throws IOException {
MiniDFSCluster cluster = null;
try {
Configuration conf = new Configuration();
cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(0)
.nnTopology(MiniDFSNNTopology.simpleHATopology())
.build();
NameNodeResourceChecker mockResourceChecker = Mockito.mock(
NameNodeResourceChecker.class);
Mockito.doReturn(true).when(mockResourceChecker).hasAvailableDiskSpace();
cluster.getNameNode(0).getNamesystem()
.setNNResourceChecker(mockResourceChecker);
NamenodeProtocols rpc = cluster.getNameNodeRpc(0);
// Should not throw error, which indicates healthy.
rpc.monitorHealth();
Mockito.doReturn(false).when(mockResourceChecker).hasAvailableDiskSpace();
try {
// Should throw error - NN is unhealthy.
rpc.monitorHealth();
fail("Should not have succeeded in calling monitorHealth");
} catch (HealthCheckFailedException hcfe) {
GenericTestUtils.assertExceptionContains(
"The NameNode has no resources available", hcfe);
}
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}