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Java DistributedFileSystem.recoverLease方法代码示例

本文整理汇总了Java中org.apache.hadoop.hdfs.DistributedFileSystem.recoverLease方法的典型用法代码示例。如果您正苦于以下问题:Java DistributedFileSystem.recoverLease方法的具体用法?Java DistributedFileSystem.recoverLease怎么用?Java DistributedFileSystem.recoverLease使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在org.apache.hadoop.hdfs.DistributedFileSystem的用法示例。


在下文中一共展示了DistributedFileSystem.recoverLease方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: recoverLease

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
 * Try to recover the lease.
 * @param dfs
 * @param nbAttempt
 * @param p
 * @param startWaiting
 * @return True if dfs#recoverLease came by true.
 * @throws FileNotFoundException
 */
boolean recoverLease(final DistributedFileSystem dfs, final int nbAttempt, final Path p,
    final long startWaiting)
throws FileNotFoundException {
  boolean recovered = false;
  try {
    recovered = dfs.recoverLease(p);
    LOG.info((recovered? "Recovered lease, ": "Failed to recover lease, ") +
      getLogMessageDetail(nbAttempt, p, startWaiting));
  } catch (IOException e) {
    if (e instanceof LeaseExpiredException && e.getMessage().contains("File does not exist")) {
      // This exception comes out instead of FNFE, fix it
      throw new FileNotFoundException("The given WAL wasn't found at " + p);
    } else if (e instanceof FileNotFoundException) {
      throw (FileNotFoundException)e;
    }
    LOG.warn(getLogMessageDetail(nbAttempt, p, startWaiting), e);
  }
  return recovered;
}
 
开发者ID:fengchen8086,项目名称:ditb,代码行数:29,代码来源:FSHDFSUtils.java

示例2: testOpenFileWhenNNAndClientCrashAfterAddBlock

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/** Test NN crash and client crash/stuck immediately after block allocation */
@Test(timeout = 100000)
public void testOpenFileWhenNNAndClientCrashAfterAddBlock() throws Exception {
  cluster.getConfiguration(0).set(
      DFSConfigKeys.DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY, "1.0f");
  String testData = "testData";
  // to make sure we write the full block before creating dummy block at NN.
  cluster.getConfiguration(0).setInt("io.bytes.per.checksum",
      testData.length());
  cluster.restartNameNode(0);
  try {
    cluster.waitActive();
    cluster.transitionToActive(0);
    cluster.transitionToStandby(1);
    DistributedFileSystem dfs = cluster.getFileSystem(0);
    String pathString = "/tmp1.txt";
    Path filePath = new Path(pathString);
    FSDataOutputStream create = dfs.create(filePath,
        FsPermission.getDefault(), true, 1024, (short) 3, testData.length(),
        null);
    create.write(testData.getBytes());
    create.hflush();
    long fileId = ((DFSOutputStream)create.
        getWrappedStream()).getFileId();
    FileStatus fileStatus = dfs.getFileStatus(filePath);
    DFSClient client = DFSClientAdapter.getClient(dfs);
    // add one dummy block at NN, but not write to DataNode
    ExtendedBlock previousBlock =
        DFSClientAdapter.getPreviousBlock(client, fileId);
    DFSClientAdapter.getNamenode(client).addBlock(
        pathString,
        client.getClientName(),
        new ExtendedBlock(previousBlock),
        new DatanodeInfo[0],
        DFSClientAdapter.getFileId((DFSOutputStream) create
            .getWrappedStream()), null);
    cluster.restartNameNode(0, true);
    cluster.restartDataNode(0);
    cluster.transitionToActive(0);
    // let the block reports be processed.
    Thread.sleep(2000);
    FSDataInputStream is = dfs.open(filePath);
    is.close();
    dfs.recoverLease(filePath);// initiate recovery
    assertTrue("Recovery also should be success", dfs.recoverLease(filePath));
  } finally {
    cluster.shutdown();
  }
}
 
开发者ID:naver,项目名称:hadoop,代码行数:50,代码来源:TestHASafeMode.java


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