本文整理汇总了Java中org.apache.hadoop.hdfs.server.datanode.DataNode.refreshNamenodes方法的典型用法代码示例。如果您正苦于以下问题：Java DataNode.refreshNamenodes方法的具体用法？Java DataNode.refreshNamenodes怎么用？Java DataNode.refreshNamenodes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类org.apache.hadoop.hdfs.server.datanode.DataNode的用法示例。
在下文中一共展示了DataNode.refreshNamenodes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: addNameNode
import org.apache.hadoop.hdfs.server.datanode.DataNode; //导入方法依赖的package包/类
/**
* Add a namenode to a federated cluster and start it. Configuration of
* datanodes in the cluster is refreshed to register with the new namenode.
*
* @return newly started namenode
*/
public NameNode addNameNode(Configuration conf, int namenodePort)
throws IOException {
if(!federation)
throw new IOException("cannot add namenode to non-federated cluster");
int nnIndex = nameNodes.length;
int numNameNodes = nameNodes.length + 1;
NameNodeInfo[] newlist = new NameNodeInfo[numNameNodes];
System.arraycopy(nameNodes, 0, newlist, 0, nameNodes.length);
nameNodes = newlist;
String nameserviceId = NAMESERVICE_ID_PREFIX + (nnIndex + 1);
String nameserviceIds = conf.get(DFS_NAMESERVICES);
nameserviceIds += "," + nameserviceId;
conf.set(DFS_NAMESERVICES, nameserviceIds);
String nnId = null;
initNameNodeAddress(conf, nameserviceId,
new NNConf(nnId).setIpcPort(namenodePort));
initNameNodeConf(conf, nameserviceId, nnId, true, true, nnIndex);
createNameNode(nnIndex, conf, numDataNodes, true, null, null,
nameserviceId, nnId);
// Refresh datanodes with the newly started namenode
for (DataNodeProperties dn : dataNodes) {
DataNode datanode = dn.datanode;
datanode.refreshNamenodes(conf);
}
// Wait for new namenode to get registrations from all the datanodes
waitActive(nnIndex);
return nameNodes[nnIndex].nameNode;
}
示例2: addNameNode
import org.apache.hadoop.hdfs.server.datanode.DataNode; //导入方法依赖的package包/类
/**
* Add a namenode to a federated cluster and start it. Configuration of
* datanodes in the cluster is refreshed to register with the new namenode.
*
* @return newly started namenode
*/
public void addNameNode(Configuration conf, int namenodePort)
throws IOException {
if(!federation)
throw new IOException("cannot add namenode to non-federated cluster");
int nameServiceIndex = namenodes.keys().size();
String nameserviceId = NAMESERVICE_ID_PREFIX + (namenodes.keys().size() + 1);
String nameserviceIds = conf.get(DFS_NAMESERVICES);
nameserviceIds += "," + nameserviceId;
conf.set(DFS_NAMESERVICES, nameserviceIds);
String nnId = null;
initNameNodeAddress(conf, nameserviceId,
new NNConf(nnId).setIpcPort(namenodePort));
// figure out the current number of NNs
NameNodeInfo[] infos = this.getNameNodeInfos(nameserviceId);
int nnIndex = infos == null ? 0 : infos.length;
initNameNodeConf(conf, nameserviceId, nameServiceIndex, nnId, true, true, nnIndex);
createNameNode(conf, true, null, null, nameserviceId, nnId);
// Refresh datanodes with the newly started namenode
for (DataNodeProperties dn : dataNodes) {
DataNode datanode = dn.datanode;
datanode.refreshNamenodes(conf);
}
// Wait for new namenode to get registrations from all the datanodes
waitActive(nnIndex);
}