/**
* Creates a {@link BlockInfo} form a given {@link MasterBlockInfo}, by populating worker
* locations.
*
* <p>NOTE: {@link #mWorkers} should already be locked before calling this method.
*
* @param masterBlockInfo the {@link MasterBlockInfo}
* @return a {@link BlockInfo} from a {@link MasterBlockInfo}. Populates worker locations
*/
private BlockInfo generateBlockInfo(MasterBlockInfo masterBlockInfo) {
// "Join" to get all the addresses of the workers.
List<BlockLocation> locations = new ArrayList<BlockLocation>();
List<MasterBlockLocation> blockLocations = masterBlockInfo.getBlockLocations();
// Sort the block locations by their alias ordinal in the master storage tier mapping
Collections.sort(
blockLocations,
new Comparator<MasterBlockLocation>() {
@Override
public int compare(MasterBlockLocation o1, MasterBlockLocation o2) {
return mGlobalStorageTierAssoc.getOrdinal(o1.getTierAlias())
- mGlobalStorageTierAssoc.getOrdinal(o2.getTierAlias());
}
});
for (MasterBlockLocation masterBlockLocation : blockLocations) {
MasterWorkerInfo workerInfo =
mWorkers.getFirstByField(mIdIndex, masterBlockLocation.getWorkerId());
if (workerInfo != null) {
locations.add(
new BlockLocation()
.setWorkerId(masterBlockLocation.getWorkerId())
.setWorkerAddress(workerInfo.getWorkerAddress())
.setTierAlias(masterBlockLocation.getTierAlias()));
}
}
return new BlockInfo()
.setBlockId(masterBlockInfo.getBlockId())
.setLength(masterBlockInfo.getLength())
.setLocations(locations);
}
/**
* Marks a block as committed on a specific worker.
*
* @param workerId the worker id committing the block
* @param usedBytesOnTier the updated used bytes on the tier of the worker
* @param tierAlias the alias of the storage tier where the worker is committing the block to
* @param blockId the committing block id
* @param length the length of the block
*/
public void commitBlock(
long workerId, long usedBytesOnTier, String tierAlias, long blockId, long length) {
LOG.debug(
"Commit block from worker: {}",
FormatUtils.parametersToString(workerId, usedBytesOnTier, blockId, length));
synchronized (mBlocks) {
synchronized (mWorkers) {
MasterWorkerInfo workerInfo = mWorkers.getFirstByField(mIdIndex, workerId);
workerInfo.addBlock(blockId);
workerInfo.updateUsedBytes(tierAlias, usedBytesOnTier);
workerInfo.updateLastUpdatedTimeMs();
MasterBlockInfo masterBlockInfo = mBlocks.get(blockId);
if (masterBlockInfo == null) {
masterBlockInfo = new MasterBlockInfo(blockId, length);
mBlocks.put(blockId, masterBlockInfo);
BlockInfoEntry blockInfo =
BlockInfoEntry.newBuilder()
.setBlockId(masterBlockInfo.getBlockId())
.setLength(masterBlockInfo.getLength())
.build();
writeJournalEntry(JournalEntry.newBuilder().setBlockInfo(blockInfo).build());
flushJournal();
}
masterBlockInfo.addWorker(workerId, tierAlias);
mLostBlocks.remove(blockId);
}
}
}
@Override
public void streamToJournalCheckpoint(JournalOutputStream outputStream) throws IOException {
outputStream.writeEntry(mBlockContainerIdGenerator.toJournalEntry());
for (MasterBlockInfo blockInfo : mBlocks.values()) {
BlockInfoEntry blockInfoEntry =
BlockInfoEntry.newBuilder()
.setBlockId(blockInfo.getBlockId())
.setLength(blockInfo.getLength())
.build();
outputStream.writeEntry(JournalEntry.newBuilder().setBlockInfo(blockInfoEntry).build());
}
}
/**
* Marks a block as committed, but without a worker location. This means the block is only in ufs.
*
* @param blockId the id of the block to commit
* @param length the length of the block
*/
public void commitBlockInUFS(long blockId, long length) {
LOG.debug("Commit block to ufs: {}", FormatUtils.parametersToString(blockId, length));
synchronized (mBlocks) {
MasterBlockInfo masterBlockInfo = mBlocks.get(blockId);
if (masterBlockInfo == null) {
// The block has not been committed previously, so add the metadata to commit the block.
masterBlockInfo = new MasterBlockInfo(blockId, length);
mBlocks.put(blockId, masterBlockInfo);
BlockInfoEntry blockInfo =
BlockInfoEntry.newBuilder()
.setBlockId(masterBlockInfo.getBlockId())
.setLength(masterBlockInfo.getLength())
.build();
writeJournalEntry(JournalEntry.newBuilder().setBlockInfo(blockInfo).build());
flushJournal();
}
}
}
/**
* Updates the worker and block metadata for blocks removed from a worker.
*
* <p>NOTE: {@link #mBlocks} should already be locked before calling this method.
*
* @param workerInfo The worker metadata object
* @param removedBlockIds A list of block ids removed from the worker
*/
private void processWorkerRemovedBlocks(
MasterWorkerInfo workerInfo, Collection<Long> removedBlockIds) {
for (long removedBlockId : removedBlockIds) {
MasterBlockInfo masterBlockInfo = mBlocks.get(removedBlockId);
if (masterBlockInfo == null) {
LOG.warn(
"Worker {} removed block {} but block does not exist.",
workerInfo.getId(),
removedBlockId);
// Continue to remove the remaining blocks.
continue;
}
LOG.info("Block {} is removed on worker {}.", removedBlockId, workerInfo.getId());
workerInfo.removeBlock(masterBlockInfo.getBlockId());
masterBlockInfo.removeWorker(workerInfo.getId());
if (masterBlockInfo.getNumLocations() == 0) {
mLostBlocks.add(removedBlockId);
}
}
}