hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestCIBadHostname.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.client;
  19
  20 import static org.junit.Assert.fail;
  21
  22 import java.net.UnknownHostException;
  23 import org.apache.hadoop.hbase.HBaseClassTestRule;
  24 import org.apache.hadoop.hbase.HBaseTestingUtility;
  25 import org.apache.hadoop.hbase.HConstants;
  26 import org.apache.hadoop.hbase.ServerName;
  27 import org.apache.hadoop.hbase.testclassification.ClientTests;
  28 import org.apache.hadoop.hbase.testclassification.MediumTests;
  29 import org.junit.AfterClass;
  30 import org.junit.BeforeClass;
  31 import org.junit.ClassRule;
  32 import org.junit.Test;
  33 import org.junit.experimental.categories.Category;
  34
  35 /**
  36  * Tests that we fail fast when hostname resolution is not working and do not cache unresolved
  37  * InetSocketAddresses.
  38  */
  39 @Category({ MediumTests.class, ClientTests.class })
  40 public class TestCIBadHostname {
  41
  42   @ClassRule
  43   public static final HBaseClassTestRule CLASS_RULE =
  44     HBaseClassTestRule.forClass(TestCIBadHostname.class);
  45
  46   private static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
  47   private static AsyncConnectionImpl CONN;
  48
  49   @BeforeClass
  50   public static void setupBeforeClass() throws Exception {
  51     TEST_UTIL.startMiniCluster();
  52     CONN = (AsyncConnectionImpl) ConnectionFactory
  53       .createAsyncConnection(TEST_UTIL.getConfiguration()).get();
  54   }
  55
  56   @AfterClass
  57   public static void teardownAfterClass() throws Exception {
  58     CONN.close();
  59     TEST_UTIL.shutdownMiniCluster();
  60   }
  61
  62   @Test(expected = UnknownHostException.class)
  63   public void testGetAdminBadHostname() throws Exception {
  64     // verify that we can get an instance with the cluster hostname
  65     ServerName master = TEST_UTIL.getHBaseCluster().getMaster().getServerName();
  66     try {
  67       CONN.getAdminStub(master);
  68     } catch (UnknownHostException uhe) {
  69       fail("Obtaining admin to the cluster master should have succeeded");
  70     }
  71
  72     // test that we fail to get a client to an unresolvable hostname, which
  73     // means it won't be cached
  74     ServerName badHost = ServerName.valueOf("unknownhost.invalid:" + HConstants.DEFAULT_MASTER_PORT,
  75       System.currentTimeMillis());
  76     CONN.getAdminStub(badHost);
  77     fail("Obtaining admin to unresolvable hostname should have failed");
  78   }
  79
  80   @Test(expected = UnknownHostException.class)
  81   public void testGetClientBadHostname() throws Exception {
  82     // verify that we can get an instance with the cluster hostname
  83     ServerName rs = TEST_UTIL.getHBaseCluster().getRegionServer(0).getServerName();
  84     try {
  85       CONN.getRegionServerStub(rs);
  86     } catch (UnknownHostException uhe) {
  87       fail("Obtaining client to the cluster regionserver should have succeeded");
  88     }
  89
  90     // test that we fail to get a client to an unresolvable hostname, which
  91     // means it won't be cached
  92     ServerName badHost = ServerName.valueOf(
  93       "unknownhost.invalid:" + HConstants.DEFAULT_REGIONSERVER_PORT, System.currentTimeMillis());
  94     CONN.getRegionServerStub(badHost);
  95     fail("Obtaining client to unresolvable hostname should have failed");
  96   }
  97 }