本文整理汇总了Java中org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY属性的典型用法代码示例。如果您正苦于以下问题：Java DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY属性的具体用法？Java DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY怎么用？Java DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类org.apache.hadoop.hdfs.DFSConfigKeys的用法示例。
在下文中一共展示了DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY属性的1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: testCanReadData
/**
* Verify that a file can be read both from NameNode and BackupNode.
*/
@Test
public void testCanReadData() throws IOException {
Path file1 = new Path("/fileToRead.dat");
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = null;
FileSystem fileSys = null;
BackupNode backup = null;
try {
// Start NameNode and BackupNode
cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(0).format(true).build();
fileSys = cluster.getFileSystem();
long txid = cluster.getNameNodeRpc().getTransactionID();
backup = startBackupNode(conf, StartupOption.BACKUP, 1);
waitCheckpointDone(cluster, txid);
// Setup dual NameNode configuration for DataNodes
String rpcAddrKeyPreffix =
DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY + ".bnCluster";
String nnAddr = cluster.getNameNode().getNameNodeAddressHostPortString();
conf.get(DFSConfigKeys.DFS_NAMENODE_RPC_ADDRESS_KEY);
String bnAddr = backup.getNameNodeAddressHostPortString();
conf.set(DFSConfigKeys.DFS_NAMESERVICES, "bnCluster");
conf.set(DFSConfigKeys.DFS_NAMESERVICE_ID, "bnCluster");
conf.set(DFSConfigKeys.DFS_HA_NAMENODES_KEY_PREFIX + ".bnCluster",
"nnActive, nnBackup");
conf.set(rpcAddrKeyPreffix + ".nnActive", nnAddr);
conf.set(rpcAddrKeyPreffix + ".nnBackup", bnAddr);
cluster.startDataNodes(conf, 3, true, StartupOption.REGULAR, null);
DFSTestUtil.createFile(
fileSys, file1, 8192, (short)3, 0);
// Read the same file from file systems pointing to NN and BN
FileSystem bnFS = FileSystem.get(
new Path("hdfs://" + bnAddr).toUri(), conf);
String nnData = DFSTestUtil.readFile(fileSys, file1);
String bnData = DFSTestUtil.readFile(bnFS, file1);
assertEquals("Data read from BackupNode and NameNode is not the same.",
nnData, bnData);
} catch(IOException e) {
LOG.error("Error in TestBackupNode: ", e);
assertTrue(e.getLocalizedMessage(), false);
} finally {
if(fileSys != null) fileSys.close();
if(backup != null) backup.stop();
if(cluster != null) cluster.shutdown();
}
}