/**
* Test if {@link FSNamesystem#handleHeartbeat} can pick up replication and/or invalidate requests
* and observes the max limit
*/
@Test
public void testHeartbeat() throws Exception {
final Configuration conf = new HdfsConfiguration();
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build();
try {
cluster.waitActive();
final FSNamesystem namesystem = cluster.getNamesystem();
final HeartbeatManager hm =
namesystem.getBlockManager().getDatanodeManager().getHeartbeatManager();
final String poolId = namesystem.getBlockPoolId();
final DatanodeRegistration nodeReg =
DataNodeTestUtils.getDNRegistrationForBP(cluster.getDataNodes().get(0), poolId);
final DatanodeDescriptor dd = NameNodeAdapter.getDatanode(namesystem, nodeReg);
final String storageID = DatanodeStorage.generateUuid();
dd.updateStorage(new DatanodeStorage(storageID));
final int REMAINING_BLOCKS = 1;
final int MAX_REPLICATE_LIMIT =
conf.getInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_MAX_STREAMS_KEY, 2);
final int MAX_INVALIDATE_LIMIT = DFSConfigKeys.DFS_BLOCK_INVALIDATE_LIMIT_DEFAULT;
final int MAX_INVALIDATE_BLOCKS = 2 * MAX_INVALIDATE_LIMIT + REMAINING_BLOCKS;
final int MAX_REPLICATE_BLOCKS = 2 * MAX_REPLICATE_LIMIT + REMAINING_BLOCKS;
final DatanodeStorageInfo[] ONE_TARGET = {dd.getStorageInfo(storageID)};
try {
namesystem.writeLock();
synchronized (hm) {
for (int i = 0; i < MAX_REPLICATE_BLOCKS; i++) {
dd.addBlockToBeReplicated(
new Block(i, 0, GenerationStamp.LAST_RESERVED_STAMP), ONE_TARGET);
}
DatanodeCommand[] cmds =
NameNodeAdapter.sendHeartBeat(nodeReg, dd, namesystem).getCommands();
assertEquals(1, cmds.length);
assertEquals(DatanodeProtocol.DNA_TRANSFER, cmds[0].getAction());
assertEquals(MAX_REPLICATE_LIMIT, ((BlockCommand) cmds[0]).getBlocks().length);
ArrayList<Block> blockList = new ArrayList<Block>(MAX_INVALIDATE_BLOCKS);
for (int i = 0; i < MAX_INVALIDATE_BLOCKS; i++) {
blockList.add(new Block(i, 0, GenerationStamp.LAST_RESERVED_STAMP));
}
dd.addBlocksToBeInvalidated(blockList);
cmds = NameNodeAdapter.sendHeartBeat(nodeReg, dd, namesystem).getCommands();
assertEquals(2, cmds.length);
assertEquals(DatanodeProtocol.DNA_TRANSFER, cmds[0].getAction());
assertEquals(MAX_REPLICATE_LIMIT, ((BlockCommand) cmds[0]).getBlocks().length);
assertEquals(DatanodeProtocol.DNA_INVALIDATE, cmds[1].getAction());
assertEquals(MAX_INVALIDATE_LIMIT, ((BlockCommand) cmds[1]).getBlocks().length);
cmds = NameNodeAdapter.sendHeartBeat(nodeReg, dd, namesystem).getCommands();
assertEquals(2, cmds.length);
assertEquals(DatanodeProtocol.DNA_TRANSFER, cmds[0].getAction());
assertEquals(REMAINING_BLOCKS, ((BlockCommand) cmds[0]).getBlocks().length);
assertEquals(DatanodeProtocol.DNA_INVALIDATE, cmds[1].getAction());
assertEquals(MAX_INVALIDATE_LIMIT, ((BlockCommand) cmds[1]).getBlocks().length);
cmds = NameNodeAdapter.sendHeartBeat(nodeReg, dd, namesystem).getCommands();
assertEquals(1, cmds.length);
assertEquals(DatanodeProtocol.DNA_INVALIDATE, cmds[0].getAction());
assertEquals(REMAINING_BLOCKS, ((BlockCommand) cmds[0]).getBlocks().length);
cmds = NameNodeAdapter.sendHeartBeat(nodeReg, dd, namesystem).getCommands();
assertEquals(0, cmds.length);
}
} finally {
namesystem.writeUnlock();
}
} finally {
cluster.shutdown();
}
}
/**
* Test if {@link FSNamesystem#handleHeartbeat} correctly selects data node targets for block
* recovery.
*/
@Test
public void testHeartbeatBlockRecovery() throws Exception {
final Configuration conf = new HdfsConfiguration();
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
try {
cluster.waitActive();
final FSNamesystem namesystem = cluster.getNamesystem();
final HeartbeatManager hm =
namesystem.getBlockManager().getDatanodeManager().getHeartbeatManager();
final String poolId = namesystem.getBlockPoolId();
final DatanodeRegistration nodeReg1 =
DataNodeTestUtils.getDNRegistrationForBP(cluster.getDataNodes().get(0), poolId);
final DatanodeDescriptor dd1 = NameNodeAdapter.getDatanode(namesystem, nodeReg1);
dd1.updateStorage(new DatanodeStorage(DatanodeStorage.generateUuid()));
final DatanodeRegistration nodeReg2 =
DataNodeTestUtils.getDNRegistrationForBP(cluster.getDataNodes().get(1), poolId);
final DatanodeDescriptor dd2 = NameNodeAdapter.getDatanode(namesystem, nodeReg2);
dd2.updateStorage(new DatanodeStorage(DatanodeStorage.generateUuid()));
final DatanodeRegistration nodeReg3 =
DataNodeTestUtils.getDNRegistrationForBP(cluster.getDataNodes().get(2), poolId);
final DatanodeDescriptor dd3 = NameNodeAdapter.getDatanode(namesystem, nodeReg3);
dd3.updateStorage(new DatanodeStorage(DatanodeStorage.generateUuid()));
try {
namesystem.writeLock();
synchronized (hm) {
NameNodeAdapter.sendHeartBeat(nodeReg1, dd1, namesystem);
NameNodeAdapter.sendHeartBeat(nodeReg2, dd2, namesystem);
NameNodeAdapter.sendHeartBeat(nodeReg3, dd3, namesystem);
// Test with all alive nodes.
DFSTestUtil.resetLastUpdatesWithOffset(dd1, 0);
DFSTestUtil.resetLastUpdatesWithOffset(dd2, 0);
DFSTestUtil.resetLastUpdatesWithOffset(dd3, 0);
final DatanodeStorageInfo[] storages = {
dd1.getStorageInfos()[0], dd2.getStorageInfos()[0], dd3.getStorageInfos()[0]
};
BlockInfo blockInfo =
new BlockInfoContiguous(
new Block(0, 0, GenerationStamp.LAST_RESERVED_STAMP), (short) 3);
blockInfo.convertToBlockUnderConstruction(BlockUCState.UNDER_RECOVERY, storages);
dd1.addBlockToBeRecovered(blockInfo);
DatanodeCommand[] cmds =
NameNodeAdapter.sendHeartBeat(nodeReg1, dd1, namesystem).getCommands();
assertEquals(1, cmds.length);
assertEquals(DatanodeProtocol.DNA_RECOVERBLOCK, cmds[0].getAction());
BlockRecoveryCommand recoveryCommand = (BlockRecoveryCommand) cmds[0];
assertEquals(1, recoveryCommand.getRecoveringBlocks().size());
DatanodeInfo[] recoveringNodes =
recoveryCommand
.getRecoveringBlocks()
.toArray(new BlockRecoveryCommand.RecoveringBlock[0])[0]
.getLocations();
assertEquals(3, recoveringNodes.length);
assertEquals(recoveringNodes[0], dd1);
assertEquals(recoveringNodes[1], dd2);
assertEquals(recoveringNodes[2], dd3);
// Test with one stale node.
DFSTestUtil.resetLastUpdatesWithOffset(dd1, 0);
// More than the default stale interval of 30 seconds.
DFSTestUtil.resetLastUpdatesWithOffset(dd2, -40 * 1000);
DFSTestUtil.resetLastUpdatesWithOffset(dd3, 0);
blockInfo =
new BlockInfoContiguous(
new Block(0, 0, GenerationStamp.LAST_RESERVED_STAMP), (short) 3);
blockInfo.convertToBlockUnderConstruction(BlockUCState.UNDER_RECOVERY, storages);
dd1.addBlockToBeRecovered(blockInfo);
cmds = NameNodeAdapter.sendHeartBeat(nodeReg1, dd1, namesystem).getCommands();
assertEquals(1, cmds.length);
assertEquals(DatanodeProtocol.DNA_RECOVERBLOCK, cmds[0].getAction());
recoveryCommand = (BlockRecoveryCommand) cmds[0];
assertEquals(1, recoveryCommand.getRecoveringBlocks().size());
recoveringNodes =
recoveryCommand
.getRecoveringBlocks()
.toArray(new BlockRecoveryCommand.RecoveringBlock[0])[0]
.getLocations();
assertEquals(2, recoveringNodes.length);
// dd2 is skipped.
assertEquals(recoveringNodes[0], dd1);
assertEquals(recoveringNodes[1], dd3);
// Test with all stale node.
DFSTestUtil.resetLastUpdatesWithOffset(dd1, -60 * 1000);
// More than the default stale interval of 30 seconds.
DFSTestUtil.resetLastUpdatesWithOffset(dd2, -40 * 1000);
DFSTestUtil.resetLastUpdatesWithOffset(dd3, -80 * 1000);
blockInfo =
new BlockInfoContiguous(
new Block(0, 0, GenerationStamp.LAST_RESERVED_STAMP), (short) 3);
blockInfo.convertToBlockUnderConstruction(BlockUCState.UNDER_RECOVERY, storages);
dd1.addBlockToBeRecovered(blockInfo);
cmds = NameNodeAdapter.sendHeartBeat(nodeReg1, dd1, namesystem).getCommands();
assertEquals(1, cmds.length);
assertEquals(DatanodeProtocol.DNA_RECOVERBLOCK, cmds[0].getAction());
recoveryCommand = (BlockRecoveryCommand) cmds[0];
assertEquals(1, recoveryCommand.getRecoveringBlocks().size());
recoveringNodes =
recoveryCommand
.getRecoveringBlocks()
.toArray(new BlockRecoveryCommand.RecoveringBlock[0])[0]
.getLocations();
// Only dd1 is included since it heart beated and hence its not stale
// when the list of recovery blocks is constructed.
assertEquals(3, recoveringNodes.length);
assertEquals(recoveringNodes[0], dd1);
assertEquals(recoveringNodes[1], dd2);
assertEquals(recoveringNodes[2], dd3);
}
} finally {
namesystem.writeUnlock();
}
} finally {
cluster.shutdown();
}
}