/**
* Ensure that the given NameNode marks the specified DataNode as entirely dead/expired.
*
* @param nn the NameNode to manipulate
* @param dnName the name of the DataNode
*/
public static void noticeDeadDatanode(NameNode nn, String dnName) {
FSNamesystem namesystem = nn.getNamesystem();
namesystem.writeLock();
try {
DatanodeManager dnm = namesystem.getBlockManager().getDatanodeManager();
HeartbeatManager hbm = dnm.getHeartbeatManager();
DatanodeDescriptor[] dnds = hbm.getDatanodes();
DatanodeDescriptor theDND = null;
for (DatanodeDescriptor dnd : dnds) {
if (dnd.getXferAddr().equals(dnName)) {
theDND = dnd;
}
}
Assert.assertNotNull("Could not find DN with name: " + dnName, theDND);
synchronized (hbm) {
DFSTestUtil.setDatanodeDead(theDND);
hbm.heartbeatCheck();
}
} finally {
namesystem.writeUnlock();
}
}
