Examples of org.apache.hadoop.hdfs.MiniDFSCluster.restartNameNode()

Class org.apache.hadoop.hdfs.MiniDFSCluster

Examples of org.apache.hadoop.hdfs.MiniDFSCluster.restartNameNode()

org.apache.hadoop.hdfs.MiniDFSCluster.restartNameNode()
Restart namenode.

      
      assertTrue(cluster.getFileSystem().exists(TEST_PATH));
      cluster.getFileSystem().mkdirs(TEST_PATH_2);
      
      // Restart the NN again and make sure both edits are persisted.
      cluster.restartNameNode();
      assertTrue(cluster.getFileSystem().exists(TEST_PATH));
      assertTrue(cluster.getFileSystem().exists(TEST_PATH_2));
    } finally {
      cluster.shutdown();
    }

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      System.out.println(contents);
      assertTrue(Pattern.compile("1 txns/\\d+ms behind").matcher(contents)
          .find());


      // Restart NN while JN0 is still down.
      cluster.restartNameNode();


      contents = DFSTestUtil.urlGet(url); 
      System.out.println(contents);
      assertTrue(Pattern.compile("never written").matcher(contents)
          .find());

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      } catch (IOException ioe) {
        // This is expected.
      }
      Mockito.reset(faultInjector);
      // Namenode should still restart successfully
      cluster.restartNameNode();
    } finally {
      if (fs != null) {
        fs.close();
      }
      cleanup(secondary);

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      LOG.info("Namenode has bad files. " + badFiles.size());
      assertTrue("Namenode has " + badFiles.size() + " bad files. Expecting 1.",
          badFiles.size() == 1);
 
      // restart namenode
      cluster.restartNameNode(0);
      fs = cluster.getFileSystem();


      // wait until replication queues have been initialized
      while (!cluster.getNameNode().namesystem.isPopulatingReplQueues()) {
        try {

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       * previous test, this test should also run while namenode is down. The
       * setup for this test depends on the previous test.
       */


      // restart the namenode and then shut it down for test
      cluster.restartNameNode(0);
      cluster.shutdownNameNode(0);


      // verify blockSeekTo() still works (forced to use cached tokens)
      in1.seek(0);
      assertTrue(checkFile1(in1));

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       * re-fetching tokens and is able to re-fetch tokens transparently. The
       * setup of this test depends on the previous test.
       */


      // restore the cluster and restart the datanodes for test
      cluster.restartNameNode(0);
      assertTrue(cluster.restartDataNodes(true));
      cluster.waitActive();
      assertEquals(numDataNodes, cluster.getDataNodes().size());


      // shutdown namenode so that DFSClient can't get new tokens from namenode

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      assertFalse(checkFile1(in1));
      // verify fetchBlockByteRange() fails (cached tokens become invalid)
      assertFalse(checkFile2(in3));


      // restart the namenode to allow DFSClient to re-fetch tokens
      cluster.restartNameNode(0);
      // verify blockSeekTo() works again (by transparently re-fetching
      // tokens from namenode)
      in1.seek(0);
      assertTrue(checkFile1(in1));
      in2.seekToNewSource(0);

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        // and one current copy. This test wants to ensure that the old genstamp
        // copy is the one that is deleted.


        LOG.info("=========================== restarting cluster");
        DataNodeProperties otherNode = cluster.stopDataNode(0);
        cluster.restartNameNode();
        
        // Restart the datanode with the corrupt replica first.
        cluster.restartDataNode(oldGenstampNode);
        cluster.waitActive();

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          }
        }
      };
      Thread.sleep(2000);
      clientThread.start();
      cluster.restartNameNode();
      clientThread.join();
      Assert.assertFalse(assertionFailedInThread.get());
    } finally {
      cluster.shutdown();
    }

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       * previous test, this test should also run while namenode is down. The
       * setup for this test depends on the previous test.
       */


      // restart the namenode and then shut it down for test
      cluster.restartNameNode();
      cluster.shutdownNameNode();


      // verify blockSeekTo() still works (forced to use cached tokens)
      in1.seek(0);
      assertTrue(checkFile1(in1));

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