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HRegion.java
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HRegion.java
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/**
* 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.regionserver;
import static org.apache.hadoop.hbase.HConstants.REPLICATION_SCOPE_LOCAL;
import static org.apache.hadoop.hbase.regionserver.HStoreFile.MAJOR_COMPACTION_KEY;
import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.io.EOFException;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.lang.reflect.Constructor;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.text.ParseException;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.NavigableMap;
import java.util.NavigableSet;
import java.util.Objects;
import java.util.Optional;
import java.util.RandomAccess;
import java.util.Set;
import java.util.TreeMap;
import java.util.UUID;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.LongAdder;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellBuilderType;
import org.apache.hadoop.hbase.CellComparator;
import org.apache.hadoop.hbase.CellComparatorImpl;
import org.apache.hadoop.hbase.CellComparatorImpl.MetaCellComparator;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.CompareOperator;
import org.apache.hadoop.hbase.CompoundConfiguration;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.DroppedSnapshotException;
import org.apache.hadoop.hbase.ExtendedCellBuilderFactory;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HConstants.OperationStatusCode;
import org.apache.hadoop.hbase.HDFSBlocksDistribution;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.NamespaceDescriptor;
import org.apache.hadoop.hbase.NotServingRegionException;
import org.apache.hadoop.hbase.PrivateCellUtil;
import org.apache.hadoop.hbase.RegionTooBusyException;
import org.apache.hadoop.hbase.Tag;
import org.apache.hadoop.hbase.TagUtil;
import org.apache.hadoop.hbase.UnknownScannerException;
import org.apache.hadoop.hbase.client.Append;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
import org.apache.hadoop.hbase.client.CompactionState;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Increment;
import org.apache.hadoop.hbase.client.IsolationLevel;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.PackagePrivateFieldAccessor;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Row;
import org.apache.hadoop.hbase.client.RowMutations;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.TableDescriptor;
import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
import org.apache.hadoop.hbase.conf.ConfigurationManager;
import org.apache.hadoop.hbase.conf.PropagatingConfigurationObserver;
import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
import org.apache.hadoop.hbase.errorhandling.ForeignExceptionSnare;
import org.apache.hadoop.hbase.exceptions.FailedSanityCheckException;
import org.apache.hadoop.hbase.exceptions.TimeoutIOException;
import org.apache.hadoop.hbase.exceptions.UnknownProtocolException;
import org.apache.hadoop.hbase.filter.ByteArrayComparable;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterWrapper;
import org.apache.hadoop.hbase.filter.IncompatibleFilterException;
import org.apache.hadoop.hbase.io.HFileLink;
import org.apache.hadoop.hbase.io.HeapSize;
import org.apache.hadoop.hbase.io.TimeRange;
import org.apache.hadoop.hbase.io.hfile.BlockCache;
import org.apache.hadoop.hbase.io.hfile.HFile;
import org.apache.hadoop.hbase.ipc.CallerDisconnectedException;
import org.apache.hadoop.hbase.ipc.CoprocessorRpcUtils;
import org.apache.hadoop.hbase.ipc.RpcCall;
import org.apache.hadoop.hbase.ipc.RpcServer;
import org.apache.hadoop.hbase.mob.MobFileCache;
import org.apache.hadoop.hbase.monitoring.MonitoredTask;
import org.apache.hadoop.hbase.monitoring.TaskMonitor;
import org.apache.hadoop.hbase.quotas.RegionServerSpaceQuotaManager;
import org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl.WriteEntry;
import org.apache.hadoop.hbase.regionserver.ScannerContext.LimitScope;
import org.apache.hadoop.hbase.regionserver.ScannerContext.NextState;
import org.apache.hadoop.hbase.regionserver.compactions.CompactionContext;
import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;
import org.apache.hadoop.hbase.regionserver.compactions.ForbidMajorCompactionChecker;
import org.apache.hadoop.hbase.regionserver.throttle.CompactionThroughputControllerFactory;
import org.apache.hadoop.hbase.regionserver.throttle.NoLimitThroughputController;
import org.apache.hadoop.hbase.regionserver.throttle.StoreHotnessProtector;
import org.apache.hadoop.hbase.regionserver.throttle.ThroughputController;
import org.apache.hadoop.hbase.regionserver.wal.WALUtil;
import org.apache.hadoop.hbase.replication.ReplicationUtils;
import org.apache.hadoop.hbase.replication.regionserver.ReplicationObserver;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
import org.apache.hadoop.hbase.snapshot.SnapshotManifest;
import org.apache.hadoop.hbase.trace.TraceUtil;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.CancelableProgressable;
import org.apache.hadoop.hbase.util.ClassSize;
import org.apache.hadoop.hbase.util.CommonFSUtils;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.HashedBytes;
import org.apache.hadoop.hbase.util.NonceKey;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;
import org.apache.hadoop.hbase.util.TableDescriptorChecker;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.wal.WAL;
import org.apache.hadoop.hbase.wal.WALEdit;
import org.apache.hadoop.hbase.wal.WALFactory;
import org.apache.hadoop.hbase.wal.WALKey;
import org.apache.hadoop.hbase.wal.WALKeyImpl;
import org.apache.hadoop.hbase.wal.WALSplitUtil;
import org.apache.hadoop.hbase.wal.WALSplitUtil.MutationReplay;
import org.apache.hadoop.util.StringUtils;
import org.apache.htrace.core.TraceScope;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
import org.apache.hbase.thirdparty.com.google.common.collect.Iterables;
import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
import org.apache.hbase.thirdparty.com.google.common.collect.Maps;
import org.apache.hbase.thirdparty.com.google.common.io.Closeables;
import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor;
import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.ServiceDescriptor;
import org.apache.hbase.thirdparty.com.google.protobuf.Message;
import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;
import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;
import org.apache.hbase.thirdparty.com.google.protobuf.Service;
import org.apache.hbase.thirdparty.com.google.protobuf.TextFormat;
import org.apache.hbase.thirdparty.com.google.protobuf.UnsafeByteOperations;
import org.apache.hbase.thirdparty.org.apache.commons.collections4.CollectionUtils;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceCall;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterStatusProtos.RegionLoad;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterStatusProtos.StoreSequenceId;
import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.CompactionDescriptor;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.FlushDescriptor;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.FlushDescriptor.FlushAction;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.FlushDescriptor.StoreFlushDescriptor;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.RegionEventDescriptor;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.RegionEventDescriptor.EventType;
import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.StoreDescriptor;
/**
* Regions store data for a certain region of a table. It stores all columns
* for each row. A given table consists of one or more Regions.
*
* <p>An Region is defined by its table and its key extent.
*
* <p>Locking at the Region level serves only one purpose: preventing the
* region from being closed (and consequently split) while other operations
* are ongoing. Each row level operation obtains both a row lock and a region
* read lock for the duration of the operation. While a scanner is being
* constructed, getScanner holds a read lock. If the scanner is successfully
* constructed, it holds a read lock until it is closed. A close takes out a
* write lock and consequently will block for ongoing operations and will block
* new operations from starting while the close is in progress.
*/
@SuppressWarnings("deprecation")
@InterfaceAudience.Private
public class HRegion implements HeapSize, PropagatingConfigurationObserver, Region {
private static final Logger LOG = LoggerFactory.getLogger(HRegion.class);
public static final String LOAD_CFS_ON_DEMAND_CONFIG_KEY =
"hbase.hregion.scan.loadColumnFamiliesOnDemand";
public static final String HBASE_MAX_CELL_SIZE_KEY = "hbase.server.keyvalue.maxsize";
public static final int DEFAULT_MAX_CELL_SIZE = 10485760;
public static final String HBASE_REGIONSERVER_MINIBATCH_SIZE =
"hbase.regionserver.minibatch.size";
public static final int DEFAULT_HBASE_REGIONSERVER_MINIBATCH_SIZE = 20000;
public static final String WAL_HSYNC_CONF_KEY = "hbase.wal.hsync";
public static final boolean DEFAULT_WAL_HSYNC = false;
/**
* This is for for using HRegion as a local storage, where we may put the recovered edits in a
* special place. Once this is set, we will only replay the recovered edits under this directory
* and ignore the original replay directory configs.
*/
public static final String SPECIAL_RECOVERED_EDITS_DIR =
"hbase.hregion.special.recovered.edits.dir";
/**
* Whether to use {@link MetaCellComparator} even if we are not meta region. Used when creating
* master local region.
*/
public static final String USE_META_CELL_COMPARATOR = "hbase.region.use.meta.cell.comparator";
public static final boolean DEFAULT_USE_META_CELL_COMPARATOR = false;
final AtomicBoolean closed = new AtomicBoolean(false);
/* Closing can take some time; use the closing flag if there is stuff we don't
* want to do while in closing state; e.g. like offer this region up to the
* master as a region to close if the carrying regionserver is overloaded.
* Once set, it is never cleared.
*/
final AtomicBoolean closing = new AtomicBoolean(false);
/**
* The max sequence id of flushed data on this region. There is no edit in memory that is
* less that this sequence id.
*/
private volatile long maxFlushedSeqId = HConstants.NO_SEQNUM;
/**
* Record the sequence id of last flush operation. Can be in advance of
* {@link #maxFlushedSeqId} when flushing a single column family. In this case,
* {@link #maxFlushedSeqId} will be older than the oldest edit in memory.
*/
private volatile long lastFlushOpSeqId = HConstants.NO_SEQNUM;
/**
* The sequence id of the last replayed open region event from the primary region. This is used
* to skip entries before this due to the possibility of replay edits coming out of order from
* replication.
*/
protected volatile long lastReplayedOpenRegionSeqId = -1L;
protected volatile long lastReplayedCompactionSeqId = -1L;
//////////////////////////////////////////////////////////////////////////////
// Members
//////////////////////////////////////////////////////////////////////////////
// map from a locked row to the context for that lock including:
// - CountDownLatch for threads waiting on that row
// - the thread that owns the lock (allow reentrancy)
// - reference count of (reentrant) locks held by the thread
// - the row itself
private final ConcurrentHashMap<HashedBytes, RowLockContext> lockedRows =
new ConcurrentHashMap<>();
protected final Map<byte[], HStore> stores =
new ConcurrentSkipListMap<>(Bytes.BYTES_RAWCOMPARATOR);
// TODO: account for each registered handler in HeapSize computation
private Map<String, Service> coprocessorServiceHandlers = Maps.newHashMap();
// Track data size in all memstores
private final MemStoreSizing memStoreSizing = new ThreadSafeMemStoreSizing();
@VisibleForTesting
RegionServicesForStores regionServicesForStores;
// Debug possible data loss due to WAL off
final LongAdder numMutationsWithoutWAL = new LongAdder();
final LongAdder dataInMemoryWithoutWAL = new LongAdder();
// Debug why CAS operations are taking a while.
final LongAdder checkAndMutateChecksPassed = new LongAdder();
final LongAdder checkAndMutateChecksFailed = new LongAdder();
// Number of requests
// Count rows for scan
final LongAdder readRequestsCount = new LongAdder();
final LongAdder cpRequestsCount = new LongAdder();
final LongAdder filteredReadRequestsCount = new LongAdder();
// Count rows for multi row mutations
final LongAdder writeRequestsCount = new LongAdder();
// Number of requests blocked by memstore size.
private final LongAdder blockedRequestsCount = new LongAdder();
// Compaction LongAdders
final LongAdder compactionsFinished = new LongAdder();
final LongAdder compactionsFailed = new LongAdder();
final LongAdder compactionNumFilesCompacted = new LongAdder();
final LongAdder compactionNumBytesCompacted = new LongAdder();
final LongAdder compactionsQueued = new LongAdder();
final LongAdder flushesQueued = new LongAdder();
private BlockCache blockCache;
private MobFileCache mobFileCache;
private final WAL wal;
private final HRegionFileSystem fs;
protected final Configuration conf;
private final Configuration baseConf;
private final int rowLockWaitDuration;
static final int DEFAULT_ROWLOCK_WAIT_DURATION = 30000;
private Path regionDir;
private FileSystem walFS;
// set to true if the region is restored from snapshot
private boolean isRestoredRegion = false;
public void setRestoredRegion(boolean restoredRegion) {
isRestoredRegion = restoredRegion;
}
// The internal wait duration to acquire a lock before read/update
// from the region. It is not per row. The purpose of this wait time
// is to avoid waiting a long time while the region is busy, so that
// we can release the IPC handler soon enough to improve the
// availability of the region server. It can be adjusted by
// tuning configuration "hbase.busy.wait.duration".
final long busyWaitDuration;
static final long DEFAULT_BUSY_WAIT_DURATION = HConstants.DEFAULT_HBASE_RPC_TIMEOUT;
// If updating multiple rows in one call, wait longer,
// i.e. waiting for busyWaitDuration * # of rows. However,
// we can limit the max multiplier.
final int maxBusyWaitMultiplier;
// Max busy wait duration. There is no point to wait longer than the RPC
// purge timeout, when a RPC call will be terminated by the RPC engine.
final long maxBusyWaitDuration;
// Max cell size. If nonzero, the maximum allowed size for any given cell
// in bytes
final long maxCellSize;
// Number of mutations for minibatch processing.
private final int miniBatchSize;
// negative number indicates infinite timeout
static final long DEFAULT_ROW_PROCESSOR_TIMEOUT = 60 * 1000L;
final ExecutorService rowProcessorExecutor = Executors.newCachedThreadPool();
private final ConcurrentHashMap<RegionScanner, Long> scannerReadPoints;
/**
* The sequence ID that was enLongAddered when this region was opened.
*/
private long openSeqNum = HConstants.NO_SEQNUM;
/**
* The default setting for whether to enable on-demand CF loading for
* scan requests to this region. Requests can override it.
*/
private boolean isLoadingCfsOnDemandDefault = false;
private final AtomicInteger majorInProgress = new AtomicInteger(0);
private final AtomicInteger minorInProgress = new AtomicInteger(0);
//
// Context: During replay we want to ensure that we do not lose any data. So, we
// have to be conservative in how we replay wals. For each store, we calculate
// the maxSeqId up to which the store was flushed. And, skip the edits which
// are equal to or lower than maxSeqId for each store.
// The following map is populated when opening the region
Map<byte[], Long> maxSeqIdInStores = new TreeMap<>(Bytes.BYTES_COMPARATOR);
/** Saved state from replaying prepare flush cache */
private PrepareFlushResult prepareFlushResult = null;
private volatile ConfigurationManager configurationManager;
// Used for testing.
private volatile Long timeoutForWriteLock = null;
private final CellComparator cellComparator;
/**
* @return The smallest mvcc readPoint across all the scanners in this
* region. Writes older than this readPoint, are included in every
* read operation.
*/
public long getSmallestReadPoint() {
long minimumReadPoint;
// We need to ensure that while we are calculating the smallestReadPoint
// no new RegionScanners can grab a readPoint that we are unaware of.
// We achieve this by synchronizing on the scannerReadPoints object.
synchronized (scannerReadPoints) {
minimumReadPoint = mvcc.getReadPoint();
for (Long readPoint : this.scannerReadPoints.values()) {
if (readPoint < minimumReadPoint) {
minimumReadPoint = readPoint;
}
}
}
return minimumReadPoint;
}
/*
* Data structure of write state flags used coordinating flushes,
* compactions and closes.
*/
static class WriteState {
// Set while a memstore flush is happening.
volatile boolean flushing = false;
// Set when a flush has been requested.
volatile boolean flushRequested = false;
// Number of compactions running.
AtomicInteger compacting = new AtomicInteger(0);
// Gets set in close. If set, cannot compact or flush again.
volatile boolean writesEnabled = true;
// Set if region is read-only
volatile boolean readOnly = false;
// whether the reads are enabled. This is different than readOnly, because readOnly is
// static in the lifetime of the region, while readsEnabled is dynamic
volatile boolean readsEnabled = true;
/**
* Set flags that make this region read-only.
*
* @param onOff flip value for region r/o setting
*/
synchronized void setReadOnly(final boolean onOff) {
this.writesEnabled = !onOff;
this.readOnly = onOff;
}
boolean isReadOnly() {
return this.readOnly;
}
boolean isFlushRequested() {
return this.flushRequested;
}
void setReadsEnabled(boolean readsEnabled) {
this.readsEnabled = readsEnabled;
}
static final long HEAP_SIZE = ClassSize.align(
ClassSize.OBJECT + 5 * Bytes.SIZEOF_BOOLEAN);
}
/**
* Objects from this class are created when flushing to describe all the different states that
* that method ends up in. The Result enum describes those states. The sequence id should only
* be specified if the flush was successful, and the failure message should only be specified
* if it didn't flush.
*/
public static class FlushResultImpl implements FlushResult {
final Result result;
final String failureReason;
final long flushSequenceId;
final boolean wroteFlushWalMarker;
/**
* Convenience constructor to use when the flush is successful, the failure message is set to
* null.
* @param result Expecting FLUSHED_NO_COMPACTION_NEEDED or FLUSHED_COMPACTION_NEEDED.
* @param flushSequenceId Generated sequence id that comes right after the edits in the
* memstores.
*/
FlushResultImpl(Result result, long flushSequenceId) {
this(result, flushSequenceId, null, false);
assert result == Result.FLUSHED_NO_COMPACTION_NEEDED || result == Result
.FLUSHED_COMPACTION_NEEDED;
}
/**
* Convenience constructor to use when we cannot flush.
* @param result Expecting CANNOT_FLUSH_MEMSTORE_EMPTY or CANNOT_FLUSH.
* @param failureReason Reason why we couldn't flush.
*/
FlushResultImpl(Result result, String failureReason, boolean wroteFlushMarker) {
this(result, -1, failureReason, wroteFlushMarker);
assert result == Result.CANNOT_FLUSH_MEMSTORE_EMPTY || result == Result.CANNOT_FLUSH;
}
/**
* Constructor with all the parameters.
* @param result Any of the Result.
* @param flushSequenceId Generated sequence id if the memstores were flushed else -1.
* @param failureReason Reason why we couldn't flush, or null.
*/
FlushResultImpl(Result result, long flushSequenceId, String failureReason,
boolean wroteFlushMarker) {
this.result = result;
this.flushSequenceId = flushSequenceId;
this.failureReason = failureReason;
this.wroteFlushWalMarker = wroteFlushMarker;
}
/**
* Convenience method, the equivalent of checking if result is
* FLUSHED_NO_COMPACTION_NEEDED or FLUSHED_NO_COMPACTION_NEEDED.
* @return true if the memstores were flushed, else false.
*/
@Override
public boolean isFlushSucceeded() {
return result == Result.FLUSHED_NO_COMPACTION_NEEDED || result == Result
.FLUSHED_COMPACTION_NEEDED;
}
/**
* Convenience method, the equivalent of checking if result is FLUSHED_COMPACTION_NEEDED.
* @return True if the flush requested a compaction, else false (doesn't even mean it flushed).
*/
@Override
public boolean isCompactionNeeded() {
return result == Result.FLUSHED_COMPACTION_NEEDED;
}
@Override
public String toString() {
return new StringBuilder()
.append("flush result:").append(result).append(", ")
.append("failureReason:").append(failureReason).append(",")
.append("flush seq id").append(flushSequenceId).toString();
}
@Override
public Result getResult() {
return result;
}
}
/** A result object from prepare flush cache stage */
@VisibleForTesting
static class PrepareFlushResult {
final FlushResultImpl result; // indicating a failure result from prepare
final TreeMap<byte[], StoreFlushContext> storeFlushCtxs;
final TreeMap<byte[], List<Path>> committedFiles;
final TreeMap<byte[], MemStoreSize> storeFlushableSize;
final long startTime;
final long flushOpSeqId;
final long flushedSeqId;
final MemStoreSizing totalFlushableSize;
/** Constructs an early exit case */
PrepareFlushResult(FlushResultImpl result, long flushSeqId) {
this(result, null, null, null, Math.max(0, flushSeqId), 0, 0, MemStoreSizing.DUD);
}
/** Constructs a successful prepare flush result */
PrepareFlushResult(
TreeMap<byte[], StoreFlushContext> storeFlushCtxs,
TreeMap<byte[], List<Path>> committedFiles,
TreeMap<byte[], MemStoreSize> storeFlushableSize, long startTime, long flushSeqId,
long flushedSeqId, MemStoreSizing totalFlushableSize) {
this(null, storeFlushCtxs, committedFiles, storeFlushableSize, startTime,
flushSeqId, flushedSeqId, totalFlushableSize);
}
private PrepareFlushResult(
FlushResultImpl result,
TreeMap<byte[], StoreFlushContext> storeFlushCtxs,
TreeMap<byte[], List<Path>> committedFiles,
TreeMap<byte[], MemStoreSize> storeFlushableSize, long startTime, long flushSeqId,
long flushedSeqId, MemStoreSizing totalFlushableSize) {
this.result = result;
this.storeFlushCtxs = storeFlushCtxs;
this.committedFiles = committedFiles;
this.storeFlushableSize = storeFlushableSize;
this.startTime = startTime;
this.flushOpSeqId = flushSeqId;
this.flushedSeqId = flushedSeqId;
this.totalFlushableSize = totalFlushableSize;
}
public FlushResult getResult() {
return this.result;
}
}
/**
* A class that tracks exceptions that have been observed in one batch. Not thread safe.
*/
static class ObservedExceptionsInBatch {
private boolean wrongRegion = false;
private boolean failedSanityCheck = false;
private boolean wrongFamily = false;
/**
* @return If a {@link WrongRegionException} has been observed.
*/
boolean hasSeenWrongRegion() {
return wrongRegion;
}
/**
* Records that a {@link WrongRegionException} has been observed.
*/
void sawWrongRegion() {
wrongRegion = true;
}
/**
* @return If a {@link FailedSanityCheckException} has been observed.
*/
boolean hasSeenFailedSanityCheck() {
return failedSanityCheck;
}
/**
* Records that a {@link FailedSanityCheckException} has been observed.
*/
void sawFailedSanityCheck() {
failedSanityCheck = true;
}
/**
* @return If a {@link NoSuchColumnFamilyException} has been observed.
*/
boolean hasSeenNoSuchFamily() {
return wrongFamily;
}
/**
* Records that a {@link NoSuchColumnFamilyException} has been observed.
*/
void sawNoSuchFamily() {
wrongFamily = true;
}
}
final WriteState writestate = new WriteState();
long memstoreFlushSize;
final long timestampSlop;
final long rowProcessorTimeout;
// Last flush time for each Store. Useful when we are flushing for each column
private final ConcurrentMap<HStore, Long> lastStoreFlushTimeMap = new ConcurrentHashMap<>();
final RegionServerServices rsServices;
private RegionServerAccounting rsAccounting;
private long flushCheckInterval;
// flushPerChanges is to prevent too many changes in memstore
private long flushPerChanges;
private long blockingMemStoreSize;
// Used to guard closes
final ReentrantReadWriteLock lock;
// Stop updates lock
private final ReentrantReadWriteLock updatesLock = new ReentrantReadWriteLock();
private final MultiVersionConcurrencyControl mvcc;
// Coprocessor host
private RegionCoprocessorHost coprocessorHost;
private TableDescriptor htableDescriptor = null;
private RegionSplitPolicy splitPolicy;
private FlushPolicy flushPolicy;
private final MetricsRegion metricsRegion;
private final MetricsRegionWrapperImpl metricsRegionWrapper;
private final Durability regionDurability;
private final boolean regionStatsEnabled;
// Stores the replication scope of the various column families of the table
// that has non-default scope
private final NavigableMap<byte[], Integer> replicationScope = new TreeMap<>(
Bytes.BYTES_COMPARATOR);
private final StoreHotnessProtector storeHotnessProtector;
/**
* HRegion constructor. This constructor should only be used for testing and
* extensions. Instances of HRegion should be instantiated with the
* {@link HRegion#createHRegion} or {@link HRegion#openHRegion} method.
*
* @param tableDir qualified path of directory where region should be located,
* usually the table directory.
* @param wal The WAL is the outbound log for any updates to the HRegion
* The wal file is a logfile from the previous execution that's
* custom-computed for this HRegion. The HRegionServer computes and sorts the
* appropriate wal info for this HRegion. If there is a previous wal file
* (implying that the HRegion has been written-to before), then read it from
* the supplied path.
* @param fs is the filesystem.
* @param confParam is global configuration settings.
* @param regionInfo - RegionInfo that describes the region
* is new), then read them from the supplied path.
* @param htd the table descriptor
* @param rsServices reference to {@link RegionServerServices} or null
* @deprecated Use other constructors.
*/
@Deprecated
@VisibleForTesting
public HRegion(final Path tableDir, final WAL wal, final FileSystem fs,
final Configuration confParam, final RegionInfo regionInfo,
final TableDescriptor htd, final RegionServerServices rsServices) {
this(new HRegionFileSystem(confParam, fs, tableDir, regionInfo),
wal, confParam, htd, rsServices);
}
/**
* HRegion constructor. This constructor should only be used for testing and
* extensions. Instances of HRegion should be instantiated with the
* {@link HRegion#createHRegion} or {@link HRegion#openHRegion} method.
*
* @param fs is the filesystem.
* @param wal The WAL is the outbound log for any updates to the HRegion
* The wal file is a logfile from the previous execution that's
* custom-computed for this HRegion. The HRegionServer computes and sorts the
* appropriate wal info for this HRegion. If there is a previous wal file
* (implying that the HRegion has been written-to before), then read it from
* the supplied path.
* @param confParam is global configuration settings.
* @param htd the table descriptor
* @param rsServices reference to {@link RegionServerServices} or null
*/
public HRegion(final HRegionFileSystem fs, final WAL wal, final Configuration confParam,
final TableDescriptor htd, final RegionServerServices rsServices) {
if (htd == null) {
throw new IllegalArgumentException("Need table descriptor");
}
if (confParam instanceof CompoundConfiguration) {
throw new IllegalArgumentException("Need original base configuration");
}
this.wal = wal;
this.fs = fs;
this.mvcc = new MultiVersionConcurrencyControl(getRegionInfo().getShortNameToLog());
// 'conf' renamed to 'confParam' b/c we use this.conf in the constructor
this.baseConf = confParam;
this.conf = new CompoundConfiguration().add(confParam).addBytesMap(htd.getValues());
this.cellComparator = htd.isMetaTable() ||
conf.getBoolean(USE_META_CELL_COMPARATOR, DEFAULT_USE_META_CELL_COMPARATOR) ?
CellComparatorImpl.META_COMPARATOR :
CellComparatorImpl.COMPARATOR;
this.lock = new ReentrantReadWriteLock(conf.getBoolean(FAIR_REENTRANT_CLOSE_LOCK,
DEFAULT_FAIR_REENTRANT_CLOSE_LOCK));
this.flushCheckInterval = conf.getInt(MEMSTORE_PERIODIC_FLUSH_INTERVAL,
DEFAULT_CACHE_FLUSH_INTERVAL);
this.flushPerChanges = conf.getLong(MEMSTORE_FLUSH_PER_CHANGES, DEFAULT_FLUSH_PER_CHANGES);
if (this.flushPerChanges > MAX_FLUSH_PER_CHANGES) {
throw new IllegalArgumentException(MEMSTORE_FLUSH_PER_CHANGES + " can not exceed "
+ MAX_FLUSH_PER_CHANGES);
}
this.rowLockWaitDuration = conf.getInt("hbase.rowlock.wait.duration",
DEFAULT_ROWLOCK_WAIT_DURATION);
this.isLoadingCfsOnDemandDefault = conf.getBoolean(LOAD_CFS_ON_DEMAND_CONFIG_KEY, true);
this.htableDescriptor = htd;
Set<byte[]> families = this.htableDescriptor.getColumnFamilyNames();
for (byte[] family : families) {
if (!replicationScope.containsKey(family)) {
int scope = htd.getColumnFamily(family).getScope();
// Only store those families that has NON-DEFAULT scope
if (scope != REPLICATION_SCOPE_LOCAL) {
// Do a copy before storing it here.
replicationScope.put(Bytes.copy(family), scope);
}
}
}
this.rsServices = rsServices;
if (this.rsServices != null) {
this.blockCache = rsServices.getBlockCache().orElse(null);
this.mobFileCache = rsServices.getMobFileCache().orElse(null);
}
this.regionServicesForStores = new RegionServicesForStores(this, rsServices);
setHTableSpecificConf();
this.scannerReadPoints = new ConcurrentHashMap<>();
this.busyWaitDuration = conf.getLong(
"hbase.busy.wait.duration", DEFAULT_BUSY_WAIT_DURATION);
this.maxBusyWaitMultiplier = conf.getInt("hbase.busy.wait.multiplier.max", 2);
if (busyWaitDuration * maxBusyWaitMultiplier <= 0L) {
throw new IllegalArgumentException("Invalid hbase.busy.wait.duration ("
+ busyWaitDuration + ") or hbase.busy.wait.multiplier.max ("
+ maxBusyWaitMultiplier + "). Their product should be positive");
}
this.maxBusyWaitDuration = conf.getLong("hbase.ipc.client.call.purge.timeout",
2 * HConstants.DEFAULT_HBASE_RPC_TIMEOUT);
/*
* timestamp.slop provides a server-side constraint on the timestamp. This
* assumes that you base your TS around currentTimeMillis(). In this case,
* throw an error to the user if the user-specified TS is newer than now +
* slop. LATEST_TIMESTAMP == don't use this functionality
*/
this.timestampSlop = conf.getLong(
"hbase.hregion.keyvalue.timestamp.slop.millisecs",
HConstants.LATEST_TIMESTAMP);
/**
* Timeout for the process time in processRowsWithLocks().
* Use -1 to switch off time bound.
*/
this.rowProcessorTimeout = conf.getLong(
"hbase.hregion.row.processor.timeout", DEFAULT_ROW_PROCESSOR_TIMEOUT);
this.storeHotnessProtector = new StoreHotnessProtector(this, conf);
boolean forceSync = conf.getBoolean(WAL_HSYNC_CONF_KEY, DEFAULT_WAL_HSYNC);
/**
* This is the global default value for durability. All tables/mutations not defining a
* durability or using USE_DEFAULT will default to this value.
*/
Durability defaultDurability = forceSync ? Durability.FSYNC_WAL : Durability.SYNC_WAL;
this.regionDurability =
this.htableDescriptor.getDurability() == Durability.USE_DEFAULT ? defaultDurability :
this.htableDescriptor.getDurability();
decorateRegionConfiguration(conf);
if (rsServices != null) {
this.rsAccounting = this.rsServices.getRegionServerAccounting();
// don't initialize coprocessors if not running within a regionserver
// TODO: revisit if coprocessors should load in other cases
this.coprocessorHost = new RegionCoprocessorHost(this, rsServices, conf);
this.metricsRegionWrapper = new MetricsRegionWrapperImpl(this);
this.metricsRegion = new MetricsRegion(this.metricsRegionWrapper, conf);
} else {
this.metricsRegionWrapper = null;
this.metricsRegion = null;
}
if (LOG.isDebugEnabled()) {
// Write out region name, its encoded name and storeHotnessProtector as string.
LOG.debug("Instantiated " + this +"; "+ storeHotnessProtector.toString());
}
configurationManager = null;
// disable stats tracking system tables, but check the config for everything else
this.regionStatsEnabled = htd.getTableName().getNamespaceAsString().equals(
NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR) ?
false :
conf.getBoolean(HConstants.ENABLE_CLIENT_BACKPRESSURE,
HConstants.DEFAULT_ENABLE_CLIENT_BACKPRESSURE);
this.maxCellSize = conf.getLong(HBASE_MAX_CELL_SIZE_KEY, DEFAULT_MAX_CELL_SIZE);
this.miniBatchSize = conf.getInt(HBASE_REGIONSERVER_MINIBATCH_SIZE,
DEFAULT_HBASE_REGIONSERVER_MINIBATCH_SIZE);
// recover the metrics of read and write requests count if they were retained
if (rsServices != null && rsServices.getRegionServerAccounting() != null) {
Pair<Long, Long> retainedRWRequestsCnt = rsServices.getRegionServerAccounting()
.getRetainedRegionRWRequestsCnt().get(getRegionInfo().getEncodedName());
if (retainedRWRequestsCnt != null) {
this.setReadRequestsCount(retainedRWRequestsCnt.getFirst());
this.setWriteRequestsCount(retainedRWRequestsCnt.getSecond());
// remove them since won't use again
rsServices.getRegionServerAccounting().getRetainedRegionRWRequestsCnt()
.remove(getRegionInfo().getEncodedName());
}
}
}
void setHTableSpecificConf() {
if (this.htableDescriptor == null) return;
long flushSize = this.htableDescriptor.getMemStoreFlushSize();
if (flushSize <= 0) {
flushSize = conf.getLong(HConstants.HREGION_MEMSTORE_FLUSH_SIZE,
TableDescriptorBuilder.DEFAULT_MEMSTORE_FLUSH_SIZE);
}
this.memstoreFlushSize = flushSize;
long mult = conf.getLong(HConstants.HREGION_MEMSTORE_BLOCK_MULTIPLIER,
HConstants.DEFAULT_HREGION_MEMSTORE_BLOCK_MULTIPLIER);
this.blockingMemStoreSize = this.memstoreFlushSize * mult;
}
/**
* Initialize this region.
* Used only by tests and SplitTransaction to reopen the region.
* You should use createHRegion() or openHRegion()
* @return What the next sequence (edit) id should be.
* @throws IOException e
* @deprecated use HRegion.createHRegion() or HRegion.openHRegion()
*/
@Deprecated
public long initialize() throws IOException {
return initialize(null);
}
/**
* Initialize this region.
*
* @param reporter Tickle every so often if initialize is taking a while.
* @return What the next sequence (edit) id should be.
* @throws IOException e
*/
@VisibleForTesting
long initialize(final CancelableProgressable reporter) throws IOException {
//Refuse to open the region if there is no column family in the table
if (htableDescriptor.getColumnFamilyCount() == 0) {
throw new DoNotRetryIOException("Table " + htableDescriptor.getTableName().getNameAsString()+
" should have at least one column family.");
}
MonitoredTask status = TaskMonitor.get().createStatus("Initializing region " + this);
status.enableStatusJournal(true);
long nextSeqId = -1;
try {
nextSeqId = initializeRegionInternals(reporter, status);
return nextSeqId;
} catch (IOException e) {
LOG.warn("Failed initialize of region= {}, starting to roll back memstore",
getRegionInfo().getRegionNameAsString(), e);
// global memstore size will be decreased when dropping memstore
try {
//drop the memory used by memstore if open region fails
dropMemStoreContents();
} catch (IOException ioE) {
if (conf.getBoolean(MemStoreLAB.USEMSLAB_KEY, MemStoreLAB.USEMSLAB_DEFAULT)) {
LOG.warn("Failed drop memstore of region= {}, "
+ "some chunks may not released forever since MSLAB is enabled",
getRegionInfo().getRegionNameAsString());
}
}
throw e;
} finally {
// nextSeqid will be -1 if the initialization fails.
// At least it will be 0 otherwise.
if (nextSeqId == -1) {
status.abort("Exception during region " + getRegionInfo().getRegionNameAsString() +
" initialization.");
}
if (LOG.isDebugEnabled()) {
LOG.debug("Region open journal for {}:\n{}", this.getRegionInfo().getEncodedName(),
status.prettyPrintJournal());
}
status.cleanup();
}
}
private long initializeRegionInternals(final CancelableProgressable reporter,
final MonitoredTask status) throws IOException {
if (coprocessorHost != null) {
status.setStatus("Running coprocessor pre-open hook");
coprocessorHost.preOpen();
}
// Write HRI to a file in case we need to recover hbase:meta
// Only the primary replica should write .regioninfo
if (this.getRegionInfo().getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {
status.setStatus("Writing region info on filesystem");
fs.checkRegionInfoOnFilesystem();
}