/**
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.mapreduce;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Deque;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.RegionServerCallable;
import org.apache.hadoop.hbase.client.RpcRetryingCallerFactory;
import org.apache.hadoop.hbase.client.coprocessor.SecureBulkLoadClient;
import org.apache.hadoop.hbase.io.HalfStoreFileReader;
import org.apache.hadoop.hbase.io.Reference;
import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFile;
import org.apache.hadoop.hbase.io.hfile.HFileContext;
import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
import org.apache.hadoop.hbase.io.hfile.HFileScanner;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.regionserver.BloomType;
import org.apache.hadoop.hbase.regionserver.HStore;
import org.apache.hadoop.hbase.regionserver.StoreFile;
import org.apache.hadoop.hbase.security.UserProvider;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
/**
* Tool to load the output of HFileOutputFormat into an existing table.
* @see #usage()
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public class LoadIncrementalHFiles extends Configured implements Tool {
private static final Log LOG = LogFactory.getLog(LoadIncrementalHFiles.class);
static final AtomicLong regionCount = new AtomicLong(0);
private HBaseAdmin hbAdmin;
private Configuration cfg;
public static final String NAME = "completebulkload";
private static final String ASSIGN_SEQ_IDS = "hbase.mapreduce.bulkload.assign.sequenceNumbers";
private boolean assignSeqIds;
private boolean hasForwardedToken;
private Token<?> userToken;
private String bulkToken;
private UserProvider userProvider;
public LoadIncrementalHFiles(Configuration conf) throws Exception {
super(conf);
this.cfg = conf;
this.hbAdmin = new HBaseAdmin(conf);
this.userProvider = UserProvider.instantiate(conf);
assignSeqIds = conf.getBoolean(ASSIGN_SEQ_IDS, true);
}
private void usage() {
System.err.println("usage: " + NAME +
" /path/to/hfileoutputformat-output " +
"tablename");
}
/**
* Represents an HFile waiting to be loaded. An queue is used
* in this class in order to support the case where a region has
* split during the process of the load. When this happens,
* the HFile is split into two physical parts across the new
* region boundary, and each part is added back into the queue.
* The import process finishes when the queue is empty.
*/
static class LoadQueueItem {
final byte[] family;
final Path hfilePath;
public LoadQueueItem(byte[] family, Path hfilePath) {
this.family = family;
this.hfilePath = hfilePath;
}
public String toString() {
return "family:"+ Bytes.toString(family) + " path:" + hfilePath.toString();
}
}
/**
* Walk the given directory for all HFiles, and return a Queue
* containing all such files.
*/
private void discoverLoadQueue(Deque<LoadQueueItem> ret, Path hfofDir)
throws IOException {
FileSystem fs = hfofDir.getFileSystem(getConf());
if (!fs.exists(hfofDir)) {
throw new FileNotFoundException("HFileOutputFormat dir " +
hfofDir + " not found");
}
FileStatus[] familyDirStatuses = fs.listStatus(hfofDir);
if (familyDirStatuses == null) {
throw new FileNotFoundException("No families found in " + hfofDir);
}
for (FileStatus stat : familyDirStatuses) {
if (!stat.isDir()) {
LOG.warn("Skipping non-directory " + stat.getPath());
continue;
}
Path familyDir = stat.getPath();
// Skip _logs, etc
if (familyDir.getName().startsWith("_")) continue;
byte[] family = familyDir.getName().getBytes();
Path[] hfiles = FileUtil.stat2Paths(fs.listStatus(familyDir));
for (Path hfile : hfiles) {
if (hfile.getName().startsWith("_")) continue;
ret.add(new LoadQueueItem(family, hfile));
}
}
}
/**
* Perform a bulk load of the given directory into the given
* pre-existing table. This method is not threadsafe.
*
* @param hfofDir the directory that was provided as the output path
* of a job using HFileOutputFormat
* @param table the table to load into
* @throws TableNotFoundException if table does not yet exist
*/
@SuppressWarnings("deprecation")
public void doBulkLoad(Path hfofDir, final HTable table)
throws TableNotFoundException, IOException
{
final HConnection conn = table.getConnection();
if (!conn.isTableAvailable(table.getName())) {
throw new TableNotFoundException("Table " +
Bytes.toStringBinary(table.getTableName()) +
"is not currently available.");
}
// initialize thread pools
int nrThreads = cfg.getInt("hbase.loadincremental.threads.max",
Runtime.getRuntime().availableProcessors());
ThreadFactoryBuilder builder = new ThreadFactoryBuilder();
builder.setNameFormat("LoadIncrementalHFiles-%1$d");
ExecutorService pool = new ThreadPoolExecutor(nrThreads, nrThreads,
60, TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
builder.build());
((ThreadPoolExecutor)pool).allowCoreThreadTimeOut(true);
// LQI queue does not need to be threadsafe -- all operations on this queue
// happen in this thread
Deque<LoadQueueItem> queue = new LinkedList<LoadQueueItem>();
try {
discoverLoadQueue(queue, hfofDir);
// check whether there is invalid family name in HFiles to be bulkloaded
Collection<HColumnDescriptor> families = table.getTableDescriptor().getFamilies();
ArrayList<String> familyNames = new ArrayList<String>();
for (HColumnDescriptor family : families) {
familyNames.add(family.getNameAsString());
}
ArrayList<String> unmatchedFamilies = new ArrayList<String>();
for (LoadQueueItem lqi : queue) {
String familyNameInHFile = Bytes.toString(lqi.family);
if (!familyNames.contains(familyNameInHFile)) {
unmatchedFamilies.add(familyNameInHFile);
}
}
if (unmatchedFamilies.size() > 0) {
String msg =
"Unmatched family names found: unmatched family names in HFiles to be bulkloaded: "
+ unmatchedFamilies + "; valid family names of table "
+ Bytes.toString(table.getTableName()) + " are: " + familyNames;
LOG.error(msg);
throw new IOException(msg);
}
int count = 0;
if (queue.isEmpty()) {
LOG.warn("Bulk load operation did not find any files to load in " +
"directory " + hfofDir.toUri() + ". Does it contain files in " +
"subdirectories that correspond to column family names?");
return;
}
//If using secure bulk load
//prepare staging directory and token
if (userProvider.isHBaseSecurityEnabled()) {
FileSystem fs = FileSystem.get(cfg);
//This condition is here for unit testing
//Since delegation token doesn't work in mini cluster
if (userProvider.isHadoopSecurityEnabled()) {
userToken = userProvider.getCurrent().getToken("HDFS_DELEGATION_TOKEN",
fs.getCanonicalServiceName());
if (userToken == null) {
hasForwardedToken = false;
userToken = fs.getDelegationToken("renewer");
} else {
hasForwardedToken = true;
LOG.info("Use the existing token: " + userToken);
}
}
bulkToken = new SecureBulkLoadClient(table).prepareBulkLoad(table.getName());
}
// Assumes that region splits can happen while this occurs.
while (!queue.isEmpty()) {
// need to reload split keys each iteration.
final Pair<byte[][], byte[][]> startEndKeys = table.getStartEndKeys();
if (count != 0) {
LOG.info("Split occured while grouping HFiles, retry attempt " +
+ count + " with " + queue.size() + " files remaining to group or split");
}
int maxRetries = cfg.getInt("hbase.bulkload.retries.number", 0);
if (maxRetries != 0 && count >= maxRetries) {
LOG.error("Retry attempted " + count + " times without completing, bailing out");
return;
}
count++;
// Using ByteBuffer for byte[] equality semantics
Multimap<ByteBuffer, LoadQueueItem> regionGroups = groupOrSplitPhase(table,
pool, queue, startEndKeys);
bulkLoadPhase(table, conn, pool, queue, regionGroups);
// NOTE: The next iteration's split / group could happen in parallel to
// atomic bulkloads assuming that there are splits and no merges, and
// that we can atomically pull out the groups we want to retry.
}
} finally {
if (userProvider.isHBaseSecurityEnabled()) {
if (userToken != null && !hasForwardedToken) {
try {
userToken.cancel(cfg);
} catch (Exception e) {
LOG.warn("Failed to cancel HDFS delegation token.", e);
}
}
if(bulkToken != null) {
new SecureBulkLoadClient(table).cleanupBulkLoad(bulkToken);
}
}
pool.shutdown();
if (queue != null && !queue.isEmpty()) {
StringBuilder err = new StringBuilder();
err.append("-------------------------------------------------\n");
err.append("Bulk load aborted with some files not yet loaded:\n");
err.append("-------------------------------------------------\n");
for (LoadQueueItem q : queue) {
err.append(" ").append(q.hfilePath).append('\n');
}
LOG.error(err);
}
}
if (queue != null && !queue.isEmpty()) {
throw new RuntimeException("Bulk load aborted with some files not yet loaded."
+ "Please check log for more details.");
}
}
/**
* This takes the LQI's grouped by likely regions and attempts to bulk load
* them. Any failures are re-queued for another pass with the
* groupOrSplitPhase.
*/
protected void bulkLoadPhase(final HTable table, final HConnection conn,
ExecutorService pool, Deque<LoadQueueItem> queue,
final Multimap<ByteBuffer, LoadQueueItem> regionGroups) throws IOException {
// atomically bulk load the groups.
Set<Future<List<LoadQueueItem>>> loadingFutures = new HashSet<Future<List<LoadQueueItem>>>();
for (Entry<ByteBuffer, ? extends Collection<LoadQueueItem>> e: regionGroups.asMap().entrySet()) {
final byte[] first = e.getKey().array();
final Collection<LoadQueueItem> lqis = e.getValue();
final Callable<List<LoadQueueItem>> call = new Callable<List<LoadQueueItem>>() {
public List<LoadQueueItem> call() throws Exception {
List<LoadQueueItem> toRetry =
tryAtomicRegionLoad(conn, table.getName(), first, lqis);
return toRetry;
}
};
loadingFutures.add(pool.submit(call));
}
// get all the results.
for (Future<List<LoadQueueItem>> future : loadingFutures) {
try {
List<LoadQueueItem> toRetry = future.get();
// LQIs that are requeued to be regrouped.
queue.addAll(toRetry);
} catch (ExecutionException e1) {
Throwable t = e1.getCause();
if (t instanceof IOException) {
// At this point something unrecoverable has happened.
// TODO Implement bulk load recovery
throw new IOException("BulkLoad encountered an unrecoverable problem", t);
}
LOG.error("Unexpected execution exception during bulk load", e1);
throw new IllegalStateException(t);
} catch (InterruptedException e1) {
LOG.error("Unexpected interrupted exception during bulk load", e1);
throw (InterruptedIOException)new InterruptedIOException().initCause(e1);
}
}
}
/**
* @return A Multimap<startkey, LoadQueueItem> that groups LQI by likely
* bulk load region targets.
*/
private Multimap<ByteBuffer, LoadQueueItem> groupOrSplitPhase(final HTable table,
ExecutorService pool, Deque<LoadQueueItem> queue,
final Pair<byte[][], byte[][]> startEndKeys) throws IOException {
// <region start key, LQI> need synchronized only within this scope of this
// phase because of the puts that happen in futures.
Multimap<ByteBuffer, LoadQueueItem> rgs = HashMultimap.create();
final Multimap<ByteBuffer, LoadQueueItem> regionGroups = Multimaps.synchronizedMultimap(rgs);
// drain LQIs and figure out bulk load groups
Set<Future<List<LoadQueueItem>>> splittingFutures = new HashSet<Future<List<LoadQueueItem>>>();
while (!queue.isEmpty()) {
final LoadQueueItem item = queue.remove();
final Callable<List<LoadQueueItem>> call = new Callable<List<LoadQueueItem>>() {
public List<LoadQueueItem> call() throws Exception {
List<LoadQueueItem> splits = groupOrSplit(regionGroups, item, table, startEndKeys);
return splits;
}
};
splittingFutures.add(pool.submit(call));
}
// get all the results. All grouping and splitting must finish before
// we can attempt the atomic loads.
for (Future<List<LoadQueueItem>> lqis : splittingFutures) {
try {
List<LoadQueueItem> splits = lqis.get();
if (splits != null) {
queue.addAll(splits);
}
} catch (ExecutionException e1) {
Throwable t = e1.getCause();
if (t instanceof IOException) {
LOG.error("IOException during splitting", e1);
throw (IOException)t; // would have been thrown if not parallelized,
}
LOG.error("Unexpected execution exception during splitting", e1);
throw new IllegalStateException(t);
} catch (InterruptedException e1) {
LOG.error("Unexpected interrupted exception during splitting", e1);
throw (InterruptedIOException)new InterruptedIOException().initCause(e1);
}
}
return regionGroups;
}
// unique file name for the table
String getUniqueName(TableName tableName) {
String name = tableName + "," + regionCount.incrementAndGet();
return name;
}
protected List<LoadQueueItem> splitStoreFile(final LoadQueueItem item,
final HTable table, byte[] startKey,
byte[] splitKey) throws IOException {
final Path hfilePath = item.hfilePath;
// We use a '_' prefix which is ignored when walking directory trees
// above.
final Path tmpDir = new Path(item.hfilePath.getParent(), "_tmp");
LOG.info("HFile at " + hfilePath + " no longer fits inside a single " +
"region. Splitting...");
String uniqueName = getUniqueName(table.getName());
HColumnDescriptor familyDesc = table.getTableDescriptor().getFamily(item.family);
Path botOut = new Path(tmpDir, uniqueName + ".bottom");
Path topOut = new Path(tmpDir, uniqueName + ".top");
splitStoreFile(getConf(), hfilePath, familyDesc, splitKey,
botOut, topOut);
// Add these back at the *front* of the queue, so there's a lower
// chance that the region will just split again before we get there.
List<LoadQueueItem> lqis = new ArrayList<LoadQueueItem>(2);
lqis.add(new LoadQueueItem(item.family, botOut));
lqis.add(new LoadQueueItem(item.family, topOut));
LOG.info("Successfully split into new HFiles " + botOut + " and " + topOut);
return lqis;
}
/**
* Attempt to assign the given load queue item into its target region group.
* If the hfile boundary no longer fits into a region, physically splits
* the hfile such that the new bottom half will fit and returns the list of
* LQI's corresponding to the resultant hfiles.
*
* protected for testing
*/
protected List<LoadQueueItem> groupOrSplit(Multimap<ByteBuffer, LoadQueueItem> regionGroups,
final LoadQueueItem item, final HTable table,
final Pair<byte[][], byte[][]> startEndKeys)
throws IOException {
final Path hfilePath = item.hfilePath;
final FileSystem fs = hfilePath.getFileSystem(getConf());
HFile.Reader hfr = HFile.createReader(fs, hfilePath,
new CacheConfig(getConf()), getConf());
final byte[] first, last;
try {
hfr.loadFileInfo();
first = hfr.getFirstRowKey();
last = hfr.getLastRowKey();
} finally {
hfr.close();
}
LOG.info("Trying to load hfile=" + hfilePath +
" first=" + Bytes.toStringBinary(first) +
" last=" + Bytes.toStringBinary(last));
if (first == null || last == null) {
assert first == null && last == null;
// TODO what if this is due to a bad HFile?
LOG.info("hfile " + hfilePath + " has no entries, skipping");
return null;
}
if (Bytes.compareTo(first, last) > 0) {
throw new IllegalArgumentException(
"Invalid range: " + Bytes.toStringBinary(first) +
" > " + Bytes.toStringBinary(last));
}
int idx = Arrays.binarySearch(startEndKeys.getFirst(), first,
Bytes.BYTES_COMPARATOR);
if (idx < 0) {
// not on boundary, returns -(insertion index). Calculate region it
// would be in.
idx = -(idx + 1) - 1;
}
final int indexForCallable = idx;
boolean lastKeyInRange =
Bytes.compareTo(last, startEndKeys.getSecond()[idx]) < 0 ||
Bytes.equals(startEndKeys.getSecond()[idx], HConstants.EMPTY_BYTE_ARRAY);
if (!lastKeyInRange) {
List<LoadQueueItem> lqis = splitStoreFile(item, table,
startEndKeys.getFirst()[indexForCallable],
startEndKeys.getSecond()[indexForCallable]);
return lqis;
}
// group regions.
regionGroups.put(ByteBuffer.wrap(startEndKeys.getFirst()[idx]), item);
return null;
}
/**
* @deprecated Use {@link #tryAtomicRegionLoad(HConnection, TableName, byte[], Collection)}
*/
@Deprecated
protected List<LoadQueueItem> tryAtomicRegionLoad(final HConnection conn,
final byte [] tableName, final byte[] first, Collection<LoadQueueItem> lqis)
throws IOException {
return tryAtomicRegionLoad(conn, TableName.valueOf(tableName), first, lqis);
}
/**
* Attempts to do an atomic load of many hfiles into a region. If it fails,
* it returns a list of hfiles that need to be retried. If it is successful
* it will return an empty list.
*
* NOTE: To maintain row atomicity guarantees, region server callable should
* succeed atomically and fails atomically.
*
* Protected for testing.
*
* @return empty list if success, list of items to retry on recoverable
* failure
*/
protected List<LoadQueueItem> tryAtomicRegionLoad(final HConnection conn,
final TableName tableName, final byte[] first, Collection<LoadQueueItem> lqis)
throws IOException {
final List<Pair<byte[], String>> famPaths =
new ArrayList<Pair<byte[], String>>(lqis.size());
for (LoadQueueItem lqi : lqis) {
famPaths.add(Pair.newPair(lqi.family, lqi.hfilePath.toString()));
}
final RegionServerCallable<Boolean> svrCallable =
new RegionServerCallable<Boolean>(conn, tableName, first) {
@Override
public Boolean call() throws Exception {
SecureBulkLoadClient secureClient = null;
boolean success = false;
try {
LOG.debug("Going to connect to server " + getLocation() + " for row "
+ Bytes.toStringBinary(getRow()) + " with hfile group " + famPaths);
byte[] regionName = getLocation().getRegionInfo().getRegionName();
if(!userProvider.isHBaseSecurityEnabled()) {
success = ProtobufUtil.bulkLoadHFile(getStub(), famPaths, regionName, assignSeqIds);
} else {
HTable table = new HTable(conn.getConfiguration(), getTableName());
secureClient = new SecureBulkLoadClient(table);
success = secureClient.bulkLoadHFiles(famPaths, userToken, bulkToken,
getLocation().getRegionInfo().getStartKey());
}
return success;
} finally {
//Best effort copying of files that might not have been imported
//from the staging directory back to original location
//in user directory
if(secureClient != null && !success) {
FileSystem fs = FileSystem.get(cfg);
for(Pair<byte[], String> el : famPaths) {
Path hfileStagingPath = null;
Path hfileOrigPath = new Path(el.getSecond());
try {
hfileStagingPath= new Path(secureClient.getStagingPath(bulkToken, el.getFirst()),
hfileOrigPath.getName());
if(fs.rename(hfileStagingPath, hfileOrigPath)) {
LOG.debug("Moved back file " + hfileOrigPath + " from " +
hfileStagingPath);
} else if(fs.exists(hfileStagingPath)){
LOG.debug("Unable to move back file " + hfileOrigPath + " from " +
hfileStagingPath);
}
} catch(Exception ex) {
LOG.debug("Unable to move back file " + hfileOrigPath + " from " +
hfileStagingPath, ex);
}
}
}
}
}
};
try {
List<LoadQueueItem> toRetry = new ArrayList<LoadQueueItem>();
Configuration conf = getConf();
boolean success = RpcRetryingCallerFactory.instantiate(conf).<Boolean> newCaller()
.callWithRetries(svrCallable);
if (!success) {
LOG.warn("Attempt to bulk load region containing "
+ Bytes.toStringBinary(first) + " into table "
+ tableName + " with files " + lqis
+ " failed. This is recoverable and they will be retried.");
toRetry.addAll(lqis); // return lqi's to retry
}
// success
return toRetry;
} catch (IOException e) {
LOG.error("Encountered unrecoverable error from region server", e);
throw e;
}
}
/**
* Split a storefile into a top and bottom half, maintaining
* the metadata, recreating bloom filters, etc.
*/
static void splitStoreFile(
Configuration conf, Path inFile,
HColumnDescriptor familyDesc, byte[] splitKey,
Path bottomOut, Path topOut) throws IOException
{
// Open reader with no block cache, and not in-memory
Reference topReference = Reference.createTopReference(splitKey);
Reference bottomReference = Reference.createBottomReference(splitKey);
copyHFileHalf(conf, inFile, topOut, topReference, familyDesc);
copyHFileHalf(conf, inFile, bottomOut, bottomReference, familyDesc);
}
/**
* Copy half of an HFile into a new HFile.
*/
private static void copyHFileHalf(
Configuration conf, Path inFile, Path outFile, Reference reference,
HColumnDescriptor familyDescriptor)
throws IOException {
FileSystem fs = inFile.getFileSystem(conf);
CacheConfig cacheConf = new CacheConfig(conf);
HalfStoreFileReader halfReader = null;
StoreFile.Writer halfWriter = null;
try {
halfReader = new HalfStoreFileReader(fs, inFile, cacheConf, reference, conf);
Map<byte[], byte[]> fileInfo = halfReader.loadFileInfo();
int blocksize = familyDescriptor.getBlocksize();
Algorithm compression = familyDescriptor.getCompression();
BloomType bloomFilterType = familyDescriptor.getBloomFilterType();
HFileContext hFileContext = new HFileContextBuilder()
.withCompression(compression)
.withChecksumType(HStore.getChecksumType(conf))
.withBytesPerCheckSum(HStore.getBytesPerChecksum(conf))
.withBlockSize(blocksize)
.withDataBlockEncoding(familyDescriptor.getDataBlockEncoding())
.build();
halfWriter = new StoreFile.WriterBuilder(conf, cacheConf,
fs)
.withFilePath(outFile)
.withBloomType(bloomFilterType)
.withFileContext(hFileContext)
.build();
HFileScanner scanner = halfReader.getScanner(false, false, false);
scanner.seekTo();
do {
KeyValue kv = scanner.getKeyValue();
halfWriter.append(kv);
} while (scanner.next());
for (Map.Entry<byte[],byte[]> entry : fileInfo.entrySet()) {
if (shouldCopyHFileMetaKey(entry.getKey())) {
halfWriter.appendFileInfo(entry.getKey(), entry.getValue());
}
}
} finally {
if (halfWriter != null) halfWriter.close();
if (halfReader != null) halfReader.close(cacheConf.shouldEvictOnClose());
}
}
private static boolean shouldCopyHFileMetaKey(byte[] key) {
return !HFile.isReservedFileInfoKey(key);
}
private boolean doesTableExist(TableName tableName) throws Exception {
return hbAdmin.tableExists(tableName);
}
/*
* Infers region boundaries for a new table.
* Parameter:
* bdryMap is a map between keys to an integer belonging to {+1, -1}
* If a key is a start key of a file, then it maps to +1
* If a key is an end key of a file, then it maps to -1
* Algo:
* 1) Poll on the keys in order:
* a) Keep adding the mapped values to these keys (runningSum)
* b) Each time runningSum reaches 0, add the start Key from when the runningSum had started to a boundary list.
* 2) Return the boundary list.
*/
public static byte[][] inferBoundaries(TreeMap<byte[], Integer> bdryMap) {
ArrayList<byte[]> keysArray = new ArrayList<byte[]>();
int runningValue = 0;
byte[] currStartKey = null;
boolean firstBoundary = true;
for (Map.Entry<byte[], Integer> item: bdryMap.entrySet()) {
if (runningValue == 0) currStartKey = item.getKey();
runningValue += item.getValue();
if (runningValue == 0) {
if (!firstBoundary) keysArray.add(currStartKey);
firstBoundary = false;
}
}
return keysArray.toArray(new byte[0][0]);
}
/*
* If the table is created for the first time, then "completebulkload" reads the files twice.
* More modifications necessary if we want to avoid doing it.
*/
private void createTable(TableName tableName, String dirPath) throws Exception {
Path hfofDir = new Path(dirPath);
FileSystem fs = hfofDir.getFileSystem(getConf());
if (!fs.exists(hfofDir)) {
throw new FileNotFoundException("HFileOutputFormat dir " +
hfofDir + " not found");
}
FileStatus[] familyDirStatuses = fs.listStatus(hfofDir);
if (familyDirStatuses == null) {
throw new FileNotFoundException("No families found in " + hfofDir);
}
HTableDescriptor htd = new HTableDescriptor(tableName);
HColumnDescriptor hcd;
// Add column families
// Build a set of keys
byte[][] keys;
TreeMap<byte[], Integer> map = new TreeMap<byte[], Integer>(Bytes.BYTES_COMPARATOR);
for (FileStatus stat : familyDirStatuses) {
if (!stat.isDir()) {
LOG.warn("Skipping non-directory " + stat.getPath());
continue;
}
Path familyDir = stat.getPath();
// Skip _logs, etc
if (familyDir.getName().startsWith("_")) continue;
byte[] family = familyDir.getName().getBytes();
hcd = new HColumnDescriptor(family);
htd.addFamily(hcd);
Path[] hfiles = FileUtil.stat2Paths(fs.listStatus(familyDir));
for (Path hfile : hfiles) {
if (hfile.getName().startsWith("_")) continue;
HFile.Reader reader = HFile.createReader(fs, hfile,
new CacheConfig(getConf()), getConf());
final byte[] first, last;
try {
if (hcd.getCompressionType() != reader.getFileContext().getCompression()) {
hcd.setCompressionType(reader.getFileContext().getCompression());
LOG.info("Setting compression " + hcd.getCompressionType().name() +
" for family " + hcd.toString());
}
reader.loadFileInfo();
first = reader.getFirstRowKey();
last = reader.getLastRowKey();
LOG.info("Trying to figure out region boundaries hfile=" + hfile +
" first=" + Bytes.toStringBinary(first) +
" last=" + Bytes.toStringBinary(last));
// To eventually infer start key-end key boundaries
Integer value = map.containsKey(first)? map.get(first):0;
map.put(first, value+1);
value = map.containsKey(last)? map.get(last):0;
map.put(last, value-1);
} finally {
reader.close();
}
}
}
keys = LoadIncrementalHFiles.inferBoundaries(map);
this.hbAdmin.createTable(htd,keys);
LOG.info("Table "+ tableName +" is available!!");
}
@Override
public int run(String[] args) throws Exception {
if (args.length != 2) {
usage();
return -1;
}
String dirPath = args[0];
TableName tableName = TableName.valueOf(args[1]);
boolean tableExists = this.doesTableExist(tableName);
if (!tableExists) this.createTable(tableName,dirPath);
Path hfofDir = new Path(dirPath);
HTable table = new HTable(this.cfg, tableName);
doBulkLoad(hfofDir, table);
return 0;
}
public static void main(String[] args) throws Exception {
int ret = ToolRunner.run(new LoadIncrementalHFiles(HBaseConfiguration.create()), args);
System.exit(ret);
}
}