/**
* 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.oozie.test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.OutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import junit.framework.TestCase;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.security.UserGroupInformation;
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.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.security.authorize.ProxyUsers;
import org.apache.oozie.BundleActionBean;
import org.apache.oozie.BundleJobBean;
import org.apache.oozie.CoordinatorActionBean;
import org.apache.oozie.CoordinatorJobBean;
import org.apache.oozie.SLAEventBean;
import org.apache.oozie.WorkflowActionBean;
import org.apache.oozie.WorkflowJobBean;
import org.apache.oozie.service.ConfigurationService;
import org.apache.oozie.service.Services;
import org.apache.oozie.service.WorkflowAppService;
import org.apache.oozie.store.CoordinatorStore;
import org.apache.oozie.store.StoreException;
import org.apache.oozie.util.IOUtils;
import org.apache.oozie.util.ParamChecker;
import org.apache.oozie.util.XLog;
/**
* Base JUnit <code>TestCase</code> subclass used by all Oozie testcases.
* <p/>
* This class provides the following functionality:
* <p/>
* <ul>
* <li>Creates a unique test working directory per test method.</li>
* <li>Resets changed system properties to their original values after every test.</li>
* <li>WaitFor that supports a predicate,to wait for a condition. It has timeout.</li>
* </ul>
* <p/>
* The base directory for the test working directory must be specified via
* the system property <code>oozie.test.dir</code>, there default value is '/tmp'.
* <p/>
* From within testcases, system properties must be changed using the {@link #setSystemProperty} method.
*/
public abstract class XTestCase extends TestCase {
private Map<String, String> sysProps;
private String testCaseDir;
private String testCaseConfDir;
private String hadoopVersion;
protected XLog log = new XLog(LogFactory.getLog(getClass()));
private static File OOZIE_SRC_DIR = null;
private static final String OOZIE_TEST_PROPERTIES = "oozie.test.properties";
public static float WAITFOR_RATIO = Float.parseFloat(System.getProperty("oozie.test.waitfor.ratio", "1"));
static {
try {
OOZIE_SRC_DIR = new File("core").getAbsoluteFile();
if (!OOZIE_SRC_DIR.exists()) {
OOZIE_SRC_DIR = OOZIE_SRC_DIR.getParentFile().getParentFile();
OOZIE_SRC_DIR = new File(OOZIE_SRC_DIR, "core");
}
if (!OOZIE_SRC_DIR.exists()) {
System.err.println();
System.err.println("Could not determine project root directory");
System.err.println();
System.exit(-1);
}
OOZIE_SRC_DIR = OOZIE_SRC_DIR.getParentFile();
String testPropsFile = System.getProperty(OOZIE_TEST_PROPERTIES, "test.properties");
File file = (testPropsFile.startsWith("/"))
? new File(testPropsFile) : new File(OOZIE_SRC_DIR, testPropsFile);
if (file.exists()) {
System.out.println();
System.out.println("*********************************************************************************");
System.out.println("Loading test system properties from: " + file.getAbsolutePath());
System.out.println();
Properties props = new Properties();
props.load(new FileReader(file));
for (Map.Entry entry : props.entrySet()) {
if (!System.getProperties().containsKey(entry.getKey())) {
System.setProperty((String) entry.getKey(), (String) entry.getValue());
System.out.println(entry.getKey() + " = " + entry.getValue());
}
else {
System.out.println(entry.getKey() + " IGNORED, using command line value = " +
System.getProperty((String) entry.getKey()));
}
}
System.out.println("*********************************************************************************");
System.out.println();
}
else {
if (System.getProperty(OOZIE_TEST_PROPERTIES) != null) {
System.err.println();
System.err.println("ERROR: Specified test file does not exist: " +
System.getProperty(OOZIE_TEST_PROPERTIES));
System.err.println();
System.exit(-1);
}
}
}
catch (IOException ex) {
throw new RuntimeException(ex);
}
}
/**
* System property to specify the parent directory for the 'oozietests' directory to be used as base for all test
* working directories. </p> If this property is not set, the assumed value is '/tmp'.
*/
public static final String OOZIE_TEST_DIR = "oozie.test.dir";
/**
* System property to specify the Hadoop Job Tracker to use for testing. </p> If this property is not set, the
* assumed value is 'locahost:9001'.
*/
public static final String OOZIE_TEST_JOB_TRACKER = "oozie.test.job.tracker";
/**
* System property to specify the Hadoop Name Node to use for testing. </p> If this property is not set, the assumed
* value is 'locahost:9000'.
*/
public static final String OOZIE_TEST_NAME_NODE = "oozie.test.name.node";
/**
* System property to specify the Hadoop Version to use for testing. </p> If this property is not set, the assumed
* value is "0.20.0"
*/
public static final String HADOOP_VERSION = "hadoop.version";
/**
* System property that specifies the user that test oozie instance runs as.
* The value of this property defaults to the "${user.name} system property.
*/
public static final String TEST_OOZIE_USER_PROP = "oozie.test.user.oozie";
/**
* System property that specifies the default test user name used by
* the tests. The defalt value of this property is <tt>test</tt>.
*/
public static final String TEST_USER1_PROP = "oozie.test.user.test";
/**
* System property that specifies an auxilliary test user name used by the
* tests. The default value of this property is <tt>test2</tt>.
*/
public static final String TEST_USER2_PROP = "oozie.test.user.test2";
/**
* System property that specifies another auxilliary test user name used by
* the tests. The default value of this property is <tt>test3</tt>.
*/
public static final String TEST_USER3_PROP = "oozie.test.user.test3";
/**
* System property that specifies the test groiup used by the tests.
* The default value of this property is <tt>testg</tt>.
*/
public static final String TEST_GROUP_PROP = "oozie.test.group";
/**
* Initialize the test working directory. <p/> If it does not exist it creates it, if it already exists it deletes
* all its contents. <p/> The test working directory it is not deleted after the test runs. <p/>
*
* @throws Exception if the test workflow working directory could not be created.
*/
@Override
protected void setUp() throws Exception {
super.setUp();
String baseDir = System.getProperty(OOZIE_TEST_DIR, new File("target/test-data").getAbsolutePath());
String msg = null;
if (!baseDir.startsWith("/")) {
msg = XLog.format("System property [{0}]=[{1}] must be set to an absolute path", OOZIE_TEST_DIR, baseDir);
}
else {
if (baseDir.length() < 4) {
msg = XLog.format("System property [{0}]=[{1}] path must be at least 4 chars", OOZIE_TEST_DIR, baseDir);
}
}
if (msg != null) {
System.err.println();
System.err.println(msg);
System.exit(-1);
}
File f = new File(baseDir);
f.mkdirs();
if (!f.exists() || !f.isDirectory()) {
System.err.println();
System.err.println(XLog.format("Could not create test dir [{0}]", baseDir));
System.exit(-1);
}
hadoopVersion = System.getProperty(HADOOP_VERSION, "0.20.0");
sysProps = new HashMap<String, String>();
testCaseDir = createTestCaseDir(this, true);
//setting up Oozie HOME and Oozie conf directory
setSystemProperty(Services.OOZIE_HOME_DIR, testCaseDir);
Services.setOozieHome();
testCaseConfDir = createTestCaseSubDir("conf");
// load test Oozie site
String oozieTestDB = System.getProperty("oozie.test.db", "hsqldb");
String defaultOozieSize =
new File(OOZIE_SRC_DIR, "core/src/test/resources/" + oozieTestDB + "-oozie-site.xml").getAbsolutePath();
String customOozieSite = System.getProperty("oozie.test.config.file", defaultOozieSize);
File source = (customOozieSite.startsWith("/"))
? new File(customOozieSite) : new File(OOZIE_SRC_DIR, customOozieSite);
source = source.getAbsoluteFile();
if (!source.exists()) {
System.err.println();
System.err.println(XLog.format("Custom configuration file for testing does no exist [{0}]",
source.getAbsolutePath()));
System.err.println();
System.exit(-1);
}
File target = new File(testCaseConfDir, "oozie-site.xml");
IOUtils.copyStream(new FileInputStream(source), new FileOutputStream(target));
File hadoopConfDir = new File(testCaseConfDir, "hadoop-conf");
hadoopConfDir.mkdir();
File actionConfDir = new File(testCaseConfDir, "action-conf");
actionConfDir.mkdir();
source = new File(OOZIE_SRC_DIR, "core/src/test/resources/hadoop-config.xml");
target = new File(hadoopConfDir, "hadoop-site.xml");
IOUtils.copyStream(new FileInputStream(source), new FileOutputStream(target));
if (System.getProperty("oozielocal.log") == null) {
setSystemProperty("oozielocal.log", "/tmp/oozielocal.log");
}
if (System.getProperty("oozie.test.hadoop.security", "simple").equals("kerberos")) {
System.setProperty("oozie.service.HadoopAccessorService.kerberos.enabled", "true");
}
if (System.getProperty("oozie.test.hadoop.minicluster", "true").equals("true")) {
setUpEmbeddedHadoop(getTestCaseDir());
}
if (System.getProperty("oozie.test.db.host") == null) {
System.setProperty("oozie.test.db.host", "localhost");
}
setSystemProperty(ConfigurationService.OOZIE_DATA_DIR, testCaseDir);
if (mrCluster != null) {
OutputStream os = new FileOutputStream(new File(hadoopConfDir, "core-site.xml"));
Configuration conf = mrCluster.createJobConf();
conf.writeXml(os);
os.close();
}
}
/**
* Clean up the test case.
*/
@Override
protected void tearDown() throws Exception {
resetSystemProperties();
sysProps = null;
testCaseDir = null;
super.tearDown();
}
/**
* Return the test working directory. The directory name is the full class name of the test plus the test method
* name.
*
* @return the test working directory path, it is always an absolute path.
*/
protected String getTestCaseDir() {
return testCaseDir;
}
/**
* Return the Oozie configuration directory for the testcase.
*
* @return the Oozie configuration directory for the testcase.
*/
protected String getTestCaseConfDir() {
return testCaseConfDir;
}
public String getHadoopVersion() {
return hadoopVersion;
}
/**
* Return the user Id use to run Oozie during the test cases.
*
* @return Oozie's user Id for running the test cases.
*/
public static String getOozieUser() {
return System.getProperty(TEST_OOZIE_USER_PROP, System.getProperty("user.name"));
}
/**
* Return the defaul test user Id. The user belongs to the test group.
*
* @return the user Id.
*/
protected static String getTestUser() {
return System.getProperty(TEST_USER1_PROP, "test");
}
/**
* Return an alternate test user Id that belongs
to the test group.
*
* @return the user Id.
*/
protected static String getTestUser2() {
return System.getProperty(TEST_USER2_PROP, "test2");
}
/**
* Return an alternate test user Id that does not belong
* to the test group.
*
* @return the user Id.
*/
protected static String getTestUser3() {
return System.getProperty(TEST_USER3_PROP, "test3");
}
/**
* Return the test group.
*
* @return the test group.
*/
protected static String getTestGroup() {
return System.getProperty(TEST_GROUP_PROP, "testg");
}
/**
* Return the test working directory.
* <p/>
* It returns <code>${oozie.test.dir}/oozietests/TESTCLASSNAME/TESTMETHODNAME</code>.
*
* @param testCase testcase instance to obtain the working directory.
* @return the test working directory.
*/
private String getTestCaseDirInternal(TestCase testCase) {
ParamChecker.notNull(testCase, "testCase");
File dir = new File(System.getProperty(OOZIE_TEST_DIR, "target/test-data"));
dir = new File(dir, "oozietests").getAbsoluteFile();
dir = new File(dir, testCase.getClass().getName());
dir = new File(dir, testCase.getName());
return dir.getAbsolutePath();
}
protected void delete(File file) throws IOException {
ParamChecker.notNull(file, "file");
if (file.getAbsolutePath().length() < 5) {
throw new RuntimeException(XLog.format("path [{0}] is too short, not deleting", file.getAbsolutePath()));
}
if (file.exists()) {
if (file.isDirectory()) {
File[] children = file.listFiles();
if (children != null) {
for (File child : children) {
delete(child);
}
}
}
if (!file.delete()) {
throw new RuntimeException(XLog.format("could not delete path [{0}]", file.getAbsolutePath()));
}
}
}
/**
* Create the test working directory.
*
* @param testCase testcase instance to obtain the working directory.
* @param cleanup indicates if the directory should be cleaned up if it exists.
* @return return the path of the test working directory, it is always an absolute path.
* @throws Exception if the test working directory could not be created or cleaned up.
*/
private String createTestCaseDir(TestCase testCase, boolean cleanup) throws Exception {
String testCaseDir = getTestCaseDirInternal(testCase);
System.out.println();
System.out.println(XLog.format("Setting testcase work dir[{0}]", testCaseDir));
if (cleanup) {
delete(new File(testCaseDir));
}
File dir = new File(testCaseDir);
if (!dir.mkdirs()) {
throw new RuntimeException(XLog.format("Could not create testcase dir[{0}]", testCaseDir));
}
return testCaseDir;
}
/**
* Create a Test case sub directory.
*
* @param subDirName sub directory name.
* @return the absolute path to the created directory.
*/
protected String createTestCaseSubDir(String subDirName) {
ParamChecker.notNull(subDirName, "subDirName");
File dir = new File(testCaseDir, subDirName);
if (!dir.mkdirs()) {
throw new RuntimeException(XLog.format("Could not create testcase subdir[{0}]", dir));
}
return dir.getAbsolutePath();
}
/**
* Set a system property for the duration of the method test case.
* <p/>
* After the test method ends the original value is restored.
*
* @param name system property name.
* @param value value to set.
*/
protected void setSystemProperty(String name, String value) {
if (!sysProps.containsKey(name)) {
String currentValue = System.getProperty(name);
sysProps.put(name, currentValue);
}
if (value != null) {
System.setProperty(name, value);
}
else {
System.getProperties().remove(name);
}
}
/**
* Reset changed system properties to their original values. <p/> Called from {@link #tearDown}.
*/
private void resetSystemProperties() {
for (Map.Entry<String, String> entry : sysProps.entrySet()) {
if (entry.getValue() != null) {
System.setProperty(entry.getKey(), entry.getValue());
}
else {
System.getProperties().remove(entry.getKey());
}
}
sysProps.clear();
}
/**
* A predicate 'closure' used by {@link XTestCase#waitFor} method.
*/
public static interface Predicate {
/**
* Perform a predicate evaluation.
*
* @return the boolean result of the evaluation.
* @throws Exception thrown if the predicate evaluation could not evaluate.
*/
public boolean evaluate() throws Exception;
}
/**
* Wait for a condition, expressed via a {@link Predicate} to become true.
*
* @param timeout maximum time in milliseconds to wait for the predicate to become true.
* @param predicate predicate waiting on.
* @return the waited time.
*/
protected long waitFor(int timeout, Predicate predicate) {
ParamChecker.notNull(predicate, "predicate");
XLog log = new XLog(LogFactory.getLog(getClass()));
long started = System.currentTimeMillis();
long mustEnd = System.currentTimeMillis() + (long)(WAITFOR_RATIO * timeout);
long lastEcho = 0;
try {
long waiting = mustEnd - System.currentTimeMillis();
log.info("Waiting up to [{0}] msec", waiting);
boolean eval;
while (!(eval = predicate.evaluate()) && System.currentTimeMillis() < mustEnd) {
if ((System.currentTimeMillis() - lastEcho) > 1000) {
waiting = mustEnd - System.currentTimeMillis();
log.info("Waiting up to [{0}] msec", waiting);
lastEcho = System.currentTimeMillis();
}
Thread.sleep(1000);
}
if (!eval) {
log.info("Waiting timed out after [{0}] msec", timeout);
}
return System.currentTimeMillis() - started;
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
/**
* Return the Hadoop Job Tracker to use for testing. </p> The value is taken from the Java sytem property {@link
* #OOZIE_TEST_JOB_TRACKER}, if this property is not set, the assumed value is 'locahost:9001'.
*
* @return the job tracker URI.
*/
protected String getJobTrackerUri() {
return System.getProperty(OOZIE_TEST_JOB_TRACKER, "localhost:9001");
}
/**
* Return the Hadoop Name Node to use for testing. </p> The value is taken from the Java sytem property {@link
* #OOZIE_TEST_NAME_NODE}, if this property is not set, the assumed value is 'locahost:9000'.
*
* @return the name node URI.
*/
protected String getNameNodeUri() {
return System.getProperty(OOZIE_TEST_NAME_NODE, "hdfs://localhost:9000");
}
public String getKeytabFile() {
String defaultFile = new File(System.getProperty("user.home"), "oozie.keytab").getAbsolutePath();
return System.getProperty("oozie.test.kerberos.keytab.file", defaultFile);
}
public String getRealm() {
return System.getProperty("oozie.test.kerberos.realm", "LOCALHOST");
}
public String getOoziePrincipal() {
return System.getProperty("oozie.test.kerberos.oozie.principal",
getOozieUser() + "/localhost") + "@" + getRealm();
}
//TODO Fix this
/**
* Clean up database schema
*
* @param conf
* @throws Exception
*/
protected void cleanUpDB(Configuration conf) throws Exception {
}
/**
* Clean up tables
*
* @throws StoreException
*/
protected void cleanUpDBTables() throws StoreException {
CoordinatorStore store = new CoordinatorStore(false);
EntityManager entityManager = store.getEntityManager();
store.beginTrx();
Query q = entityManager.createNamedQuery("GET_WORKFLOWS");
List<WorkflowJobBean> wfjBeans = q.getResultList();
int wfjSize = wfjBeans.size();
for (WorkflowJobBean w : wfjBeans) {
entityManager.remove(w);
}
q = entityManager.createNamedQuery("GET_ACTIONS");
List<WorkflowActionBean> wfaBeans = q.getResultList();
int wfaSize = wfaBeans.size();
for (WorkflowActionBean w : wfaBeans) {
entityManager.remove(w);
}
q = entityManager.createNamedQuery("GET_COORD_JOBS");
List<CoordinatorJobBean> cojBeans = q.getResultList();
int cojSize = cojBeans.size();
for (CoordinatorJobBean w : cojBeans) {
entityManager.remove(w);
}
q = entityManager.createNamedQuery("GET_COORD_ACTIONS");
List<CoordinatorActionBean> coaBeans = q.getResultList();
int coaSize = coaBeans.size();
for (CoordinatorActionBean w : coaBeans) {
entityManager.remove(w);
}
q = entityManager.createNamedQuery("GET_BUNDLE_JOBS");
List<BundleJobBean> bjBeans = q.getResultList();
int bjSize = bjBeans.size();
for (BundleJobBean w : bjBeans) {
entityManager.remove(w);
}
q = entityManager.createNamedQuery("GET_BUNDLE_ACTIONS");
List<BundleActionBean> baBeans = q.getResultList();
int baSize = baBeans.size();
for (BundleActionBean w : baBeans) {
entityManager.remove(w);
}
q = entityManager.createNamedQuery("GET_SLA_EVENTS");
List<SLAEventBean> slaBeans = q.getResultList();
int slaSize = slaBeans.size();
for (SLAEventBean w : slaBeans) {
entityManager.remove(w);
}
store.commitTrx();
store.closeTrx();
log.info(wfjSize + " entries in WF_JOBS removed from DB!");
log.info(wfaSize + " entries in WF_ACTIONS removed from DB!");
log.info(cojSize + " entries in COORD_JOBS removed from DB!");
log.info(coaSize + " entries in COORD_ACTIONS removed from DB!");
log.info(bjSize + " entries in BUNDLE_JOBS removed from DB!");
log.info(baSize + " entries in BUNDLE_ACTIONS removed from DB!");
log.info(slaSize + " entries in SLA_EVENTS removed from DB!");
}
private static MiniDFSCluster dfsCluster = null;
private static MiniMRCluster mrCluster = null;
private void setUpEmbeddedHadoop(String testCaseDir) throws Exception {
if (dfsCluster == null && mrCluster == null) {
if (System.getProperty("hadoop.log.dir") == null) {
System.setProperty("hadoop.log.dir", testCaseDir);
}
int taskTrackers = 2;
int dataNodes = 2;
String oozieUser = getOozieUser();
JobConf conf = new JobConf();
conf.set("dfs.block.access.token.enable", "false");
conf.set("dfs.permissions", "true");
conf.set("hadoop.security.authentication", "simple");
//Doing this because Hadoop 1.x does not support '*' and
//Hadoop 0.23.x does not process wildcard if the value is
// '*,127.0.0.1'
StringBuilder sb = new StringBuilder();
sb.append("127.0.0.1,localhost");
for (InetAddress i : InetAddress.getAllByName(InetAddress.getLocalHost().getHostName())) {
sb.append(",").append(i.getCanonicalHostName());
}
conf.set("hadoop.proxyuser." + oozieUser + ".hosts", sb.toString());
conf.set("hadoop.proxyuser." + oozieUser + ".groups", getTestGroup());
conf.set("mapred.tasktracker.map.tasks.maximum", "4");
conf.set("mapred.tasktracker.reduce.tasks.maximum", "4");
String [] userGroups = new String[] { getTestGroup() };
UserGroupInformation.createUserForTesting(oozieUser, userGroups);
UserGroupInformation.createUserForTesting(getTestUser(), userGroups);
UserGroupInformation.createUserForTesting(getTestUser2(), userGroups);
UserGroupInformation.createUserForTesting(getTestUser3(), new String[] { "users" } );
conf.set("hadoop.tmp.dir", "target/test-data"+"/minicluster");
dfsCluster = new MiniDFSCluster(conf, dataNodes, true, null);
FileSystem fileSystem = dfsCluster.getFileSystem();
fileSystem.mkdirs(new Path("target/test-data"));
fileSystem.mkdirs(new Path("target/test-data"+"/minicluster/mapred"));
fileSystem.mkdirs(new Path("/user"));
fileSystem.mkdirs(new Path("/tmp"));
fileSystem.mkdirs(new Path("/hadoop/mapred/system"));
fileSystem.setPermission(new Path("target/test-data"), FsPermission.valueOf("-rwxrwxrwx"));
fileSystem.setPermission(new Path("target/test-data"+"/minicluster"), FsPermission.valueOf("-rwxrwxrwx"));
fileSystem.setPermission(new Path("target/test-data"+"/minicluster/mapred"), FsPermission.valueOf("-rwxrwxrwx"));
fileSystem.setPermission(new Path("/user"), FsPermission.valueOf("-rwxrwxrwx"));
fileSystem.setPermission(new Path("/tmp"), FsPermission.valueOf("-rwxrwxrwx"));
fileSystem.setPermission(new Path("/hadoop/mapred/system"), FsPermission.valueOf("-rwx------"));
String nnURI = fileSystem.getUri().toString();
int numDirs = 1;
String[] racks = null;
String[] hosts = null;
mrCluster = new MiniMRCluster(0, 0, taskTrackers, nnURI, numDirs, racks, hosts, null, conf);
JobConf jobConf = mrCluster.createJobConf();
System.setProperty(OOZIE_TEST_JOB_TRACKER, jobConf.get("mapred.job.tracker"));
System.setProperty(OOZIE_TEST_NAME_NODE, jobConf.get("fs.default.name"));
ProxyUsers.refreshSuperUserGroupsConfiguration(conf);
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
try {
if (mrCluster != null) {
mrCluster.shutdown();
}
}
catch (Exception ex) {
System.out.println(ex);
}
try {
if (dfsCluster != null) {
dfsCluster.shutdown();
}
}
catch (Exception ex) {
System.out.println(ex);
}
}
});
}
}
}