@Test
public void testOpenFilesWithRename() throws Exception {
Path path = new Path("/test");
doWriteAndAbort(fs, path);
// check for zero sized blocks
Path fileWithEmptyBlock = new Path("/test/test/test4");
fs.create(fileWithEmptyBlock);
NamenodeProtocols nameNodeRpc = cluster.getNameNodeRpc();
String clientName = fs.getClient().getClientName();
// create one empty block
nameNodeRpc.addBlock(
fileWithEmptyBlock.toString(),
clientName,
null,
null,
HdfsConstants.GRANDFATHER_INODE_ID,
null);
fs.createSnapshot(path, "s2");
fs.rename(new Path("/test/test"), new Path("/test/test-renamed"));
fs.delete(new Path("/test/test-renamed"), true);
NameNode nameNode = cluster.getNameNode();
NameNodeAdapter.enterSafeMode(nameNode, false);
NameNodeAdapter.saveNamespace(nameNode);
NameNodeAdapter.leaveSafeMode(nameNode);
cluster.restartNameNode(true);
}
private void doTestMultipleSnapshots(boolean saveNamespace) throws IOException {
Path path = new Path("/test");
doWriteAndAbort(fs, path);
fs.createSnapshot(path, "s2");
fs.delete(new Path("/test/test"), true);
fs.deleteSnapshot(path, "s2");
cluster.triggerBlockReports();
if (saveNamespace) {
NameNode nameNode = cluster.getNameNode();
NameNodeAdapter.enterSafeMode(nameNode, false);
NameNodeAdapter.saveNamespace(nameNode);
NameNodeAdapter.leaveSafeMode(nameNode);
}
cluster.restartNameNode(true);
}
@Test
public void testWithCheckpoint() throws Exception {
Path path = new Path("/test");
doWriteAndAbort(fs, path);
fs.delete(new Path("/test/test"), true);
NameNode nameNode = cluster.getNameNode();
NameNodeAdapter.enterSafeMode(nameNode, false);
NameNodeAdapter.saveNamespace(nameNode);
NameNodeAdapter.leaveSafeMode(nameNode);
cluster.restartNameNode(true);
// read snapshot file after restart
String test2snapshotPath = Snapshot.getSnapshotPath(path.toString(), "s1/test/test2");
DFSTestUtil.readFile(fs, new Path(test2snapshotPath));
String test3snapshotPath = Snapshot.getSnapshotPath(path.toString(), "s1/test/test3");
DFSTestUtil.readFile(fs, new Path(test3snapshotPath));
}