本文整理匯總了Java中org.apache.hadoop.hdfs.DistributedFileSystem.recoverLease方法的典型用法代碼示例。如果您正苦於以下問題：Java DistributedFileSystem.recoverLease方法的具體用法？Java DistributedFileSystem.recoverLease怎麽用？Java DistributedFileSystem.recoverLease使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類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個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: recoverLease
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
/**
* 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;
}
示例2: testOpenFileWhenNNAndClientCrashAfterAddBlock
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
/** 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();
}
}