本文整理汇总了Java中org.apache.hadoop.hdfs.server.datanode.DataNode.getBlockLocalPathInfo方法的典型用法代码示例。如果您正苦于以下问题：Java DataNode.getBlockLocalPathInfo方法的具体用法？Java DataNode.getBlockLocalPathInfo怎么用？Java DataNode.getBlockLocalPathInfo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.getBlockLocalPathInfo方法的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: testBlockRecoveryWithLessMetafile
import org.apache.hadoop.hdfs.server.datanode.DataNode; //导入方法依赖的package包/类
/**
* Block Recovery when the meta file not having crcs for all chunks in block
* file
*/
@Test
public void testBlockRecoveryWithLessMetafile() throws Exception {
Configuration conf = new Configuration();
conf.set(DFSConfigKeys.DFS_BLOCK_LOCAL_PATH_ACCESS_USER_KEY,
UserGroupInformation.getCurrentUser().getShortUserName());
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
Path file = new Path("/testRecoveryFile");
DistributedFileSystem dfs = cluster.getFileSystem();
FSDataOutputStream out = dfs.create(file);
int count = 0;
while (count < 2 * 1024 * 1024) {
out.writeBytes("Data");
count += 4;
}
out.hsync();
// abort the original stream
((DFSOutputStream) out.getWrappedStream()).abort();
LocatedBlocks locations = cluster.getNameNodeRpc().getBlockLocations(
file.toString(), 0, count);
ExtendedBlock block = locations.get(0).getBlock();
DataNode dn = cluster.getDataNodes().get(0);
BlockLocalPathInfo localPathInfo = dn.getBlockLocalPathInfo(block, null);
File metafile = new File(localPathInfo.getMetaPath());
assertTrue(metafile.exists());
// reduce the block meta file size
RandomAccessFile raf = new RandomAccessFile(metafile, "rw");
raf.setLength(metafile.length() - 20);
raf.close();
// restart DN to make replica to RWR
DataNodeProperties dnProp = cluster.stopDataNode(0);
cluster.restartDataNode(dnProp, true);
// try to recover the lease
DistributedFileSystem newdfs = (DistributedFileSystem) FileSystem
.newInstance(cluster.getConfiguration(0));
count = 0;
while (++count < 10 && !newdfs.recoverLease(file)) {
Thread.sleep(1000);
}
assertTrue("File should be closed", newdfs.recoverLease(file));
}