Package org.apache.hadoop.fs

Examples of org.apache.hadoop.fs.FSDataOutputStream.hflush()

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      // write a block and a half
      AppendTestUtil.write(stm, 0, BLOCK_AND_A_HALF);
      sizeWritten += BLOCK_AND_A_HALF;
     
      // Make sure all of the blocks are written out before failover.
      stm.hflush();

      LOG.info("Failing over to NN 1");
      scenario.run(cluster);

      // NOTE: explicitly do *not* make any further metadata calls
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      // write a block and a half
      AppendTestUtil.write(stm, 0, BLOCK_AND_A_HALF);
     
      // Make sure all the blocks are written before failover
      stm.hflush();

      LOG.info("Failing over to NN 1");
      scenario.run(cluster);

      assertTrue(fs.exists(TEST_PATH));
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      cluster.stopDataNode(0);

      // write another block and a half
      AppendTestUtil.write(stm, BLOCK_AND_A_HALF, BLOCK_AND_A_HALF);
      stm.hflush();
     
      LOG.info("Failing back to NN 0");
      cluster.transitionToStandby(1);
      cluster.transitionToActive(0);
     
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      cluster.transitionToActive(0);
     
      cluster.stopDataNode(1);
     
      AppendTestUtil.write(stm, BLOCK_AND_A_HALF*2, BLOCK_AND_A_HALF);
      stm.hflush();
     
     
      stm.close();
      stm = null;
     
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      FileSystem fs = HATestUtil.configureFailoverFs(cluster, conf);
      stm = fs.create(TEST_PATH);
     
      // write a block and a half
      AppendTestUtil.write(stm, 0, BLOCK_AND_A_HALF);
      stm.hflush();
     
      LOG.info("Failing over to NN 1");
     
      cluster.transitionToStandby(0);
      cluster.transitionToActive(1);
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      FileSystem fs = HATestUtil.configureFailoverFs(cluster, conf);
      stm = fs.create(TEST_PATH);
     
      // write a half block
      AppendTestUtil.write(stm, 0, BLOCK_SIZE / 2);
      stm.hflush();
     
      // Look into the block manager on the active node for the block
      // under construction.
     
      NameNode nn0 = cluster.getNameNode(0);
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    @Override
    public void doAnAction() throws Exception {
      FSDataOutputStream stm = fs.create(path, true);
      try {
        AppendTestUtil.write(stm, 0, 100);
        stm.hflush();
        loopRecoverLease(fsOtherUser, path);
        AppendTestUtil.check(fs, path, 100);
      } finally {
        try {
          stm.close();
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    try {
      for (int i = 0; i < 5; i++) {
        FSDataOutputStream stm = fs.create(new Path("/test-uc-" + i));
        stms.add(stm);
        stm.write(1);
        stm.hflush();
      }
      // Roll edit log so that, when the SBN restarts, it will load
      // the namespace during startup and enter safemode.
      nn0.getRpcServer().rollEditLog();
    } finally {
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      stm.close();
      // open the file again for append
      stm = fs.append(fileToAppend);
      int mid = rawData.length - 1;
      stm.write(rawData, 1, mid - 1);
      stm.hflush();

      /*
       * wait till token used in stm expires
       */
      Token<BlockTokenIdentifier> token = DFSTestUtil.getBlockToken(stm);
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      FSDataOutputStream stm = writeFile(fs, fileToWrite, (short) numDataNodes,
          BLOCK_SIZE);
      // write a partial block
      int mid = rawData.length - 1;
      stm.write(rawData, 0, mid);
      stm.hflush();

      /*
       * wait till token used in stm expires
       */
      Token<BlockTokenIdentifier> token = DFSTestUtil.getBlockToken(stm);
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