synchronized List<Block> invalidateWork(final DatanodeDescriptor dn) {
final long delay = getInvalidationDelay();
if (delay > 0) {
if (BlockManager.LOG.isDebugEnabled()) {
BlockManager.LOG.debug(
"Block deletion is delayed during NameNode startup. "
+ "The deletion will start after "
+ delay
+ " ms.");
}
return null;
}
final LightWeightHashSet<Block> set = node2blocks.get(dn);
if (set == null) {
return null;
}
// # blocks that can be sent in one message is limited
final int limit = blockInvalidateLimit;
final List<Block> toInvalidate = set.pollN(limit);
// If we send everything in this message, remove this node entry
if (set.isEmpty()) {
remove(dn);
}
dn.addBlocksToBeInvalidated(toInvalidate);
numBlocks -= toInvalidate.size();
return toInvalidate;
}
/** Remove the specified number of blocks to be invalidated */
public Block[] getInvalidateBlocks(int maxblocks) {
synchronized (invalidateBlocks) {
Block[] deleteList =
invalidateBlocks.pollToArray(new Block[Math.min(invalidateBlocks.size(), maxblocks)]);
return deleteList.length == 0 ? null : deleteList;
}
}
/**
* @return true if the given storage has the given block listed for invalidation. Blocks are
* compared including their generation stamps: if a block is pending invalidation but with a
* different generation stamp, returns false.
*/
synchronized boolean contains(final DatanodeInfo dn, final Block block) {
final LightWeightHashSet<Block> s = node2blocks.get(dn);
if (s == null) {
return false; // no invalidate blocks for this storage ID
}
Block blockInSet = s.getElement(block);
return blockInSet != null && block.getGenerationStamp() == blockInSet.getGenerationStamp();
}
/** Remove the block from the specified storage. */
synchronized void remove(final DatanodeInfo dn, final Block block) {
final LightWeightHashSet<Block> v = node2blocks.get(dn);
if (v != null && v.remove(block)) {
numBlocks--;
if (v.isEmpty()) {
node2blocks.remove(dn);
}
}
}
/** Add a block to the block collection which will be invalidated on the specified datanode. */
synchronized void add(final Block block, final DatanodeInfo datanode, final boolean log) {
LightWeightHashSet<Block> set = node2blocks.get(datanode);
if (set == null) {
set = new LightWeightHashSet<Block>();
node2blocks.put(datanode, set);
}
if (set.add(block)) {
numBlocks++;
if (log) {
NameNode.blockStateChangeLog.info(
"BLOCK* " + getClass().getSimpleName() + ": add " + block + " to " + datanode);
}
}
}
/** Print the contents to out. */
synchronized void dump(final PrintWriter out) {
final int size = node2blocks.values().size();
out.println("Metasave: Blocks " + numBlocks + " waiting deletion from " + size + " datanodes.");
if (size == 0) {
return;
}
for (Map.Entry<DatanodeInfo, LightWeightHashSet<Block>> entry : node2blocks.entrySet()) {
final LightWeightHashSet<Block> blocks = entry.getValue();
if (blocks.size() > 0) {
out.println(entry.getKey());
out.println(blocks);
}
}
}
/** Store block invalidation work. */
void addBlocksToBeInvalidated(List<Block> blocklist) {
assert (blocklist != null && blocklist.size() > 0);
synchronized (invalidateBlocks) {
for (Block blk : blocklist) {
invalidateBlocks.add(blk);
}
}
}
@Override
public String dumpDatanode() {
StringBuilder sb = new StringBuilder(super.dumpDatanode());
int repl = replicateBlocks.size();
if (repl > 0) {
sb.append(" ").append(repl).append(" blocks to be replicated;");
}
int inval = invalidateBlocks.size();
if (inval > 0) {
sb.append(" ").append(inval).append(" blocks to be invalidated;");
}
int recover = recoverBlocks.size();
if (recover > 0) {
sb.append(" ").append(recover).append(" blocks to be recovered;");
}
return sb.toString();
}
/** Remove a storage from the invalidatesSet */
synchronized void remove(final DatanodeInfo dn) {
final LightWeightHashSet<Block> blocks = node2blocks.remove(dn);
if (blocks != null) {
numBlocks -= blocks.size();
}
}
/** The number of block invalidation items that are pending to be sent to the datanode */
int getNumberOfBlocksToBeInvalidated() {
synchronized (invalidateBlocks) {
return invalidateBlocks.size();
}
}