/**
* 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.mapreduce.v2;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.yarn.api.records.NodeId;
import org.apache.hadoop.yarn.server.resourcemanager.MockNodes;
import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
import org.apache.hadoop.yarn.server.resourcemanager.RMNMInfo;
import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.mockito.Mockito.*;
public class TestRMNMInfo {
private static final Log LOG = LogFactory.getLog(TestRMNMInfo.class);
private static final int NUMNODEMANAGERS = 4;
protected static MiniMRYarnCluster mrCluster;
private static Configuration initialConf = new Configuration();
private static FileSystem localFs;
static {
try {
localFs = FileSystem.getLocal(initialConf);
} catch (IOException io) {
throw new RuntimeException("problem getting local fs", io);
}
}
private static Path TEST_ROOT_DIR =
new Path("target",TestRMNMInfo.class.getName() + "-tmpDir")
.makeQualified(localFs.getUri(), localFs.getWorkingDirectory());
static Path APP_JAR = new Path(TEST_ROOT_DIR, "MRAppJar.jar");
@BeforeClass
public static void setup() throws IOException {
if (!(new File(MiniMRYarnCluster.APPJAR)).exists()) {
LOG.info("MRAppJar " + MiniMRYarnCluster.APPJAR
+ " not found. Not running test.");
return;
}
if (mrCluster == null) {
mrCluster = new MiniMRYarnCluster(TestRMNMInfo.class.getName(),
NUMNODEMANAGERS);
Configuration conf = new Configuration();
mrCluster.init(conf);
mrCluster.start();
}
// workaround the absent public distcache.
localFs.copyFromLocalFile(new Path(MiniMRYarnCluster.APPJAR), APP_JAR);
localFs.setPermission(APP_JAR, new FsPermission("700"));
}
@AfterClass
public static void tearDown() {
if (mrCluster != null) {
mrCluster.stop();
mrCluster = null;
}
}
@Test
public void testRMNMInfo() throws Exception {
if (!(new File(MiniMRYarnCluster.APPJAR)).exists()) {
LOG.info("MRAppJar " + MiniMRYarnCluster.APPJAR
+ " not found. Not running test.");
return;
}
RMContext rmc = mrCluster.getResourceManager().getRMContext();
ResourceScheduler rms = mrCluster.getResourceManager()
.getResourceScheduler();
RMNMInfo rmInfo = new RMNMInfo(rmc,rms);
String liveNMs = rmInfo.getLiveNodeManagers();
ObjectMapper mapper = new ObjectMapper();
JsonNode jn = mapper.readTree(liveNMs);
Assert.assertEquals("Unexpected number of live nodes:",
NUMNODEMANAGERS, jn.size());
Iterator<JsonNode> it = jn.iterator();
while (it.hasNext()) {
JsonNode n = it.next();
Assert.assertNotNull(n.get("HostName"));
Assert.assertNotNull(n.get("Rack"));
Assert.assertTrue("Node " + n.get("NodeId") + " should be RUNNING",
n.get("State").asText().contains("RUNNING"));
Assert.assertNotNull(n.get("NodeHTTPAddress"));
Assert.assertNotNull(n.get("LastHealthUpdate"));
Assert.assertNotNull(n.get("HealthReport"));
Assert.assertNotNull(n.get("NodeManagerVersion"));
Assert.assertNotNull(n.get("NumContainers"));
Assert.assertEquals(
n.get("NodeId") + ": Unexpected number of used containers",
0, n.get("NumContainers").asInt());
Assert.assertEquals(
n.get("NodeId") + ": Unexpected amount of used memory",
0, n.get("UsedMemoryMB").asInt());
Assert.assertNotNull(n.get("AvailableMemoryMB"));
}
}
@Test
public void testRMNMInfoMissmatch() throws Exception {
RMContext rmc = mock(RMContext.class);
ResourceScheduler rms = mock(ResourceScheduler.class);
ConcurrentMap<NodeId, RMNode> map = new ConcurrentHashMap<NodeId, RMNode>();
RMNode node = MockNodes.newNodeInfo(1, MockNodes.newResource(4 * 1024));
map.put(node.getNodeID(), node);
when(rmc.getRMNodes()).thenReturn(map);
RMNMInfo rmInfo = new RMNMInfo(rmc,rms);
String liveNMs = rmInfo.getLiveNodeManagers();
ObjectMapper mapper = new ObjectMapper();
JsonNode jn = mapper.readTree(liveNMs);
Assert.assertEquals("Unexpected number of live nodes:",
1, jn.size());
Iterator<JsonNode> it = jn.iterator();
while (it.hasNext()) {
JsonNode n = it.next();
Assert.assertNotNull(n.get("HostName"));
Assert.assertNotNull(n.get("Rack"));
Assert.assertTrue("Node " + n.get("NodeId") + " should be RUNNING",
n.get("State").asText().contains("RUNNING"));
Assert.assertNotNull(n.get("NodeHTTPAddress"));
Assert.assertNotNull(n.get("LastHealthUpdate"));
Assert.assertNotNull(n.get("HealthReport"));
Assert.assertNotNull(n.get("NodeManagerVersion"));
Assert.assertNull(n.get("NumContainers"));
Assert.assertNull(n.get("UsedMemoryMB"));
Assert.assertNull(n.get("AvailableMemoryMB"));
}
}
}