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Posted to commits@accumulo.apache.org by ec...@apache.org on 2013/11/29 19:24:39 UTC
[05/15] Merge branch '1.4.5-SNAPSHOT' into 1.5.1-SNAPSHOT
http://git-wip-us.apache.org/repos/asf/accumulo/blob/27c1d770/server/src/main/java/org/apache/accumulo/server/tabletserver/Tablet.java
----------------------------------------------------------------------
diff --cc server/src/main/java/org/apache/accumulo/server/tabletserver/Tablet.java
index a3d3627,0000000..3acf6f1
mode 100644,000000..100644
--- a/server/src/main/java/org/apache/accumulo/server/tabletserver/Tablet.java
+++ b/server/src/main/java/org/apache/accumulo/server/tabletserver/Tablet.java
@@@ -1,3925 -1,0 +1,3923 @@@
+/*
+ * 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.accumulo.server.tabletserver;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.EnumSet;
+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.PriorityQueue;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.TreeSet;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.concurrent.locks.ReentrantLock;
+
+import org.apache.accumulo.core.Constants;
+import org.apache.accumulo.core.client.Connector;
+import org.apache.accumulo.core.client.IteratorSetting;
+import org.apache.accumulo.core.client.impl.ScannerImpl;
+import org.apache.accumulo.core.conf.AccumuloConfiguration;
+import org.apache.accumulo.core.conf.ConfigurationObserver;
+import org.apache.accumulo.core.conf.Property;
+import org.apache.accumulo.core.constraints.Violations;
+import org.apache.accumulo.core.data.ByteSequence;
+import org.apache.accumulo.core.data.Column;
+import org.apache.accumulo.core.data.ColumnUpdate;
+import org.apache.accumulo.core.data.Key;
+import org.apache.accumulo.core.data.KeyExtent;
+import org.apache.accumulo.core.data.KeyValue;
+import org.apache.accumulo.core.data.Mutation;
+import org.apache.accumulo.core.data.Range;
+import org.apache.accumulo.core.data.Value;
+import org.apache.accumulo.core.data.thrift.IterInfo;
+import org.apache.accumulo.core.data.thrift.MapFileInfo;
+import org.apache.accumulo.core.file.FileOperations;
+import org.apache.accumulo.core.file.FileSKVIterator;
+import org.apache.accumulo.core.file.FileUtil;
+import org.apache.accumulo.core.iterators.IterationInterruptedException;
+import org.apache.accumulo.core.iterators.IteratorEnvironment;
+import org.apache.accumulo.core.iterators.IteratorUtil;
+import org.apache.accumulo.core.iterators.IteratorUtil.IteratorScope;
+import org.apache.accumulo.core.iterators.SortedKeyValueIterator;
+import org.apache.accumulo.core.iterators.system.ColumnFamilySkippingIterator;
+import org.apache.accumulo.core.iterators.system.ColumnQualifierFilter;
+import org.apache.accumulo.core.iterators.system.DeletingIterator;
+import org.apache.accumulo.core.iterators.system.InterruptibleIterator;
+import org.apache.accumulo.core.iterators.system.MultiIterator;
+import org.apache.accumulo.core.iterators.system.SourceSwitchingIterator;
+import org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.DataSource;
+import org.apache.accumulo.core.iterators.system.StatsIterator;
+import org.apache.accumulo.core.iterators.system.VisibilityFilter;
+import org.apache.accumulo.core.master.thrift.TabletLoadState;
+import org.apache.accumulo.core.security.Authorizations;
+import org.apache.accumulo.core.security.ColumnVisibility;
+import org.apache.accumulo.core.security.CredentialHelper;
+import org.apache.accumulo.core.security.thrift.TCredentials;
+import org.apache.accumulo.core.util.CachedConfiguration;
+import org.apache.accumulo.core.util.LocalityGroupUtil;
+import org.apache.accumulo.core.util.MetadataTable.DataFileValue;
+import org.apache.accumulo.core.util.Pair;
+import org.apache.accumulo.core.util.UtilWaitThread;
+import org.apache.accumulo.fate.zookeeper.IZooReaderWriter;
+import org.apache.accumulo.server.ServerConstants;
+import org.apache.accumulo.server.client.HdfsZooInstance;
+import org.apache.accumulo.server.conf.ServerConfiguration;
+import org.apache.accumulo.server.conf.TableConfiguration;
+import org.apache.accumulo.server.constraints.ConstraintChecker;
+import org.apache.accumulo.server.master.state.TServerInstance;
+import org.apache.accumulo.server.master.tableOps.CompactRange.CompactionIterators;
+import org.apache.accumulo.server.problems.ProblemReport;
+import org.apache.accumulo.server.problems.ProblemReports;
+import org.apache.accumulo.server.problems.ProblemType;
+import org.apache.accumulo.server.security.SecurityConstants;
+import org.apache.accumulo.server.tabletserver.Compactor.CompactionCanceledException;
+import org.apache.accumulo.server.tabletserver.Compactor.CompactionEnv;
+import org.apache.accumulo.server.tabletserver.FileManager.ScanFileManager;
+import org.apache.accumulo.server.tabletserver.InMemoryMap.MemoryIterator;
+import org.apache.accumulo.server.tabletserver.TabletServer.TservConstraintEnv;
+import org.apache.accumulo.server.tabletserver.TabletServerResourceManager.TabletResourceManager;
+import org.apache.accumulo.server.tabletserver.TabletStatsKeeper.Operation;
+import org.apache.accumulo.server.tabletserver.log.DfsLogger;
+import org.apache.accumulo.server.tabletserver.log.MutationReceiver;
+import org.apache.accumulo.server.tabletserver.mastermessage.TabletStatusMessage;
+import org.apache.accumulo.server.tabletserver.metrics.TabletServerMinCMetrics;
+import org.apache.accumulo.server.trace.TraceFileSystem;
+import org.apache.accumulo.server.util.MapCounter;
+import org.apache.accumulo.server.util.MetadataTable;
+import org.apache.accumulo.server.util.MetadataTable.LogEntry;
+import org.apache.accumulo.server.util.TabletOperations;
+import org.apache.accumulo.server.zookeeper.ZooReaderWriter;
+import org.apache.accumulo.start.classloader.vfs.AccumuloVFSClassLoader;
+import org.apache.accumulo.trace.instrument.Span;
+import org.apache.accumulo.trace.instrument.Trace;
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.binary.Hex;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.Trash;
+import org.apache.hadoop.io.Text;
+import org.apache.log4j.Logger;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.KeeperException.NoNodeException;
+
+
+/*
+ * We need to be able to have the master tell a tabletServer to
+ * close this file, and the tablet server to handle all pending client reads
+ * before closing
+ *
+ */
+
+/**
+ *
+ * this class just provides an interface to read from a MapFile mostly takes care of reporting start and end keys
+ *
+ * need this because a single row extent can have multiple columns this manages all the columns (each handled by a store) for a single row-extent
+ *
+ *
+ */
+
+public class Tablet {
+
+ enum MajorCompactionReason {
+ // do not change the order, the order of this enum determines the order
+ // in which queued major compactions are executed
+ USER,
+ CHOP,
+ NORMAL,
+ IDLE
+ }
+
+ enum MinorCompactionReason {
+ USER, SYSTEM, CLOSE
+ }
+
+ public class CommitSession {
+
+ private int seq;
+ private InMemoryMap memTable;
+ private int commitsInProgress;
+ private long maxCommittedTime = Long.MIN_VALUE;
+
+ private CommitSession(int seq, InMemoryMap imm) {
+ this.seq = seq;
+ this.memTable = imm;
+ commitsInProgress = 0;
+ }
+
+ public int getWALogSeq() {
+ return seq;
+ }
+
+ private void decrementCommitsInProgress() {
+ if (commitsInProgress < 1)
+ throw new IllegalStateException("commitsInProgress = " + commitsInProgress);
+
+ commitsInProgress--;
+ if (commitsInProgress == 0)
+ Tablet.this.notifyAll();
+ }
+
+ private void incrementCommitsInProgress() {
+ if (commitsInProgress < 0)
+ throw new IllegalStateException("commitsInProgress = " + commitsInProgress);
+
+ commitsInProgress++;
+ }
+
+ private void waitForCommitsToFinish() {
+ while (commitsInProgress > 0) {
+ try {
+ Tablet.this.wait(50);
+ } catch (InterruptedException e) {
+ log.warn(e, e);
+ }
+ }
+ }
+
+ public void abortCommit(List<Mutation> value) {
+ Tablet.this.abortCommit(this, value);
+ }
+
+ public void commit(List<Mutation> mutations) {
+ Tablet.this.commit(this, mutations);
+ }
+
+ public Tablet getTablet() {
+ return Tablet.this;
+ }
+
+ public boolean beginUpdatingLogsUsed(ArrayList<DfsLogger> copy, boolean mincFinish) {
+ return Tablet.this.beginUpdatingLogsUsed(memTable, copy, mincFinish);
+ }
+
+ public void finishUpdatingLogsUsed() {
+ Tablet.this.finishUpdatingLogsUsed();
+ }
+
+ public int getLogId() {
+ return logId;
+ }
+
+ public KeyExtent getExtent() {
+ return extent;
+ }
+
+ private void updateMaxCommittedTime(long time) {
+ maxCommittedTime = Math.max(time, maxCommittedTime);
+ }
+
+ private long getMaxCommittedTime() {
+ if (maxCommittedTime == Long.MIN_VALUE)
+ throw new IllegalStateException("Tried to read max committed time when it was never set");
+ return maxCommittedTime;
+ }
+
+ }
+
+ private class TabletMemory {
+ private InMemoryMap memTable;
+ private InMemoryMap otherMemTable;
+ private InMemoryMap deletingMemTable;
+ private int nextSeq = 1;
+ private CommitSession commitSession;
+
+ TabletMemory() {
+ memTable = new InMemoryMap(tabletServer.getSystemConfiguration());
+ commitSession = new CommitSession(nextSeq, memTable);
+ nextSeq += 2;
+ }
+
+ InMemoryMap getMemTable() {
+ return memTable;
+ }
+
+ InMemoryMap getMinCMemTable() {
+ return otherMemTable;
+ }
+
+ CommitSession prepareForMinC() {
+ if (otherMemTable != null) {
+ throw new IllegalStateException();
+ }
+
+ if (deletingMemTable != null) {
+ throw new IllegalStateException();
+ }
+
+ otherMemTable = memTable;
+ memTable = new InMemoryMap(tabletServer.getSystemConfiguration());
+
+ CommitSession oldCommitSession = commitSession;
+ commitSession = new CommitSession(nextSeq, memTable);
+ nextSeq += 2;
+
+ tabletResources.updateMemoryUsageStats(memTable.estimatedSizeInBytes(), otherMemTable.estimatedSizeInBytes());
+
+ return oldCommitSession;
+ }
+
+ void finishedMinC() {
+
+ if (otherMemTable == null) {
+ throw new IllegalStateException();
+ }
+
+ if (deletingMemTable != null) {
+ throw new IllegalStateException();
+ }
+
+ deletingMemTable = otherMemTable;
+
+ otherMemTable = null;
+ Tablet.this.notifyAll();
+ }
+
+ void finalizeMinC() {
+ try {
+ deletingMemTable.delete(15000);
+ } finally {
+ synchronized (Tablet.this) {
+ if (otherMemTable != null) {
+ throw new IllegalStateException();
+ }
+
+ if (deletingMemTable == null) {
+ throw new IllegalStateException();
+ }
+
+ deletingMemTable = null;
+
+ tabletResources.updateMemoryUsageStats(memTable.estimatedSizeInBytes(), 0);
+ }
+ }
+ }
+
+ boolean memoryReservedForMinC() {
+ return otherMemTable != null || deletingMemTable != null;
+ }
+
+ void waitForMinC() {
+ while (otherMemTable != null || deletingMemTable != null) {
+ try {
+ Tablet.this.wait(50);
+ } catch (InterruptedException e) {
+ log.warn(e, e);
+ }
+ }
+ }
+
+ void mutate(CommitSession cm, List<Mutation> mutations) {
+ cm.memTable.mutate(mutations);
+ }
+
+ void updateMemoryUsageStats() {
+ long other = 0;
+ if (otherMemTable != null)
+ other = otherMemTable.estimatedSizeInBytes();
+ else if (deletingMemTable != null)
+ other = deletingMemTable.estimatedSizeInBytes();
+
+ tabletResources.updateMemoryUsageStats(memTable.estimatedSizeInBytes(), other);
+ }
+
+ List<MemoryIterator> getIterators() {
+ List<MemoryIterator> toReturn = new ArrayList<MemoryIterator>(2);
+ toReturn.add(memTable.skvIterator());
+ if (otherMemTable != null)
+ toReturn.add(otherMemTable.skvIterator());
+ return toReturn;
+ }
+
+ void returnIterators(List<MemoryIterator> iters) {
+ for (MemoryIterator iter : iters) {
+ iter.close();
+ }
+ }
+
+ public long getNumEntries() {
+ if (otherMemTable != null)
+ return memTable.getNumEntries() + otherMemTable.getNumEntries();
+ return memTable.getNumEntries();
+ }
+
+ CommitSession getCommitSession() {
+ return commitSession;
+ }
+ }
+
+ private TabletMemory tabletMemory;
+
+ private final TabletTime tabletTime;
+ private long persistedTime;
+ private final Object timeLock = new Object();
+
+ private final Path location; // absolute path of this tablets dir
+ private TServerInstance lastLocation;
+
+ private Configuration conf;
+ private FileSystem fs;
+
+ private TableConfiguration acuTableConf;
+
+ private volatile boolean tableDirChecked = false;
+
+ private AtomicLong dataSourceDeletions = new AtomicLong(0);
+ private Set<ScanDataSource> activeScans = new HashSet<ScanDataSource>();
+
+ private volatile boolean closing = false;
+ private boolean closed = false;
+ private boolean closeComplete = false;
+
+ private long lastFlushID = -1;
+ private long lastCompactID = -1;
+
+ private KeyExtent extent;
+
+ private TabletResourceManager tabletResources;
+ final private DatafileManager datafileManager;
+ private volatile boolean majorCompactionInProgress = false;
+ private volatile boolean majorCompactionWaitingToStart = false;
+ private Set<MajorCompactionReason> majorCompactionQueued = Collections.synchronizedSet(EnumSet.noneOf(MajorCompactionReason.class));
+ private volatile boolean minorCompactionInProgress = false;
+ private volatile boolean minorCompactionWaitingToStart = false;
+
+ private boolean updatingFlushID = false;
+
+ private AtomicReference<ConstraintChecker> constraintChecker = new AtomicReference<ConstraintChecker>();
+
+ private final String tabletDirectory;
+
+ private int writesInProgress = 0;
+
+ private static final Logger log = Logger.getLogger(Tablet.class);
+ public TabletStatsKeeper timer;
+
+ private Rate queryRate = new Rate(0.2);
+ private long queryCount = 0;
+
+ private Rate queryByteRate = new Rate(0.2);
+ private long queryBytes = 0;
+
+ private Rate ingestRate = new Rate(0.2);
+ private long ingestCount = 0;
+
+ private Rate ingestByteRate = new Rate(0.2);
+ private long ingestBytes = 0;
+
+ private byte[] defaultSecurityLabel = new byte[0];
+
+ private long lastMinorCompactionFinishTime;
+ private long lastMapFileImportTime;
+
+ private volatile long numEntries;
+ private volatile long numEntriesInMemory;
+
+
+ // a count of the amount of data read by the iterators
+ private AtomicLong scannedCount = new AtomicLong(0);
+ private Rate scannedRate = new Rate(0.2);
+
+ private ConfigurationObserver configObserver;
+
+ private TabletServer tabletServer;
+
+ private final int logId;
+ // ensure we only have one reader/writer of our bulk file notes at at time
+ public final Object bulkFileImportLock = new Object();
+
+ public int getLogId() {
+ return logId;
+ }
+
+ public static class TabletClosedException extends RuntimeException {
+ public TabletClosedException(Exception e) {
+ super(e);
+ }
+
+ public TabletClosedException() {
+ super();
+ }
+
+ private static final long serialVersionUID = 1L;
+ }
+
+ String getNextMapFilename(String prefix) throws IOException {
+ String extension = FileOperations.getNewFileExtension(tabletServer.getTableConfiguration(extent));
+ checkTabletDir();
+ return location.toString() + "/" + prefix + UniqueNameAllocator.getInstance().getNextName() + "." + extension;
+ }
+
+ private void checkTabletDir() throws IOException {
+ if (!tableDirChecked) {
+ checkTabletDir(this.location);
+ tableDirChecked = true;
+ }
+ }
+
+ private void checkTabletDir(Path tabletDir) throws IOException {
+
+ FileStatus[] files = null;
+ try {
+ files = fs.listStatus(tabletDir);
+ } catch (FileNotFoundException ex) {
+ // ignored
+ }
+
+ if (files == null) {
+ if (tabletDir.getName().startsWith("c-"))
+ log.debug("Tablet " + extent + " had no dir, creating " + tabletDir); // its a clone dir...
+ else
+ log.warn("Tablet " + extent + " had no dir, creating " + tabletDir);
+
+ fs.mkdirs(tabletDir);
+ }
+ }
+
+ private static String rel2abs(String relPath, KeyExtent extent) {
+ if (relPath.startsWith("../"))
+ return ServerConstants.getTablesDir() + relPath.substring(2);
+ else
+ return ServerConstants.getTablesDir() + "/" + extent.getTableId() + relPath;
+ }
+
+ class DatafileManager {
+ // access to datafilesizes needs to be synchronized: see CompactionRunner#getNumFiles
+ final private Map<Path,DataFileValue> datafileSizes = Collections.synchronizedMap(new TreeMap<Path,DataFileValue>());
+
+ DatafileManager(SortedMap<String,DataFileValue> datafileSizes) {
+ for (Entry<String,DataFileValue> datafiles : datafileSizes.entrySet())
+ this.datafileSizes.put(new Path(rel2abs(datafiles.getKey(), extent)), datafiles.getValue());
+ }
+
+ Path mergingMinorCompactionFile = null;
+ Set<Path> filesToDeleteAfterScan = new HashSet<Path>();
+ Map<Long,Set<Path>> scanFileReservations = new HashMap<Long,Set<Path>>();
+ MapCounter<Path> fileScanReferenceCounts = new MapCounter<Path>();
+ long nextScanReservationId = 0;
+ boolean reservationsBlocked = false;
+
+ Set<Path> majorCompactingFiles = new HashSet<Path>();
+
+ Pair<Long,Map<String,DataFileValue>> reserveFilesForScan() {
+ synchronized (Tablet.this) {
+
+ while (reservationsBlocked) {
+ try {
+ Tablet.this.wait(50);
+ } catch (InterruptedException e) {
+ log.warn(e, e);
+ }
+ }
+
+ Set<Path> absFilePaths = new HashSet<Path>(datafileSizes.keySet());
+
+ long rid = nextScanReservationId++;
+
+ scanFileReservations.put(rid, absFilePaths);
+
+ Map<String,DataFileValue> ret = new HashMap<String,MetadataTable.DataFileValue>();
+
+ for (Path path : absFilePaths) {
+ fileScanReferenceCounts.increment(path, 1);
+ ret.put(path.toString(), datafileSizes.get(path));
+ }
+
+ return new Pair<Long,Map<String,DataFileValue>>(rid, ret);
+ }
+ }
+
+ void returnFilesForScan(Long reservationId) {
+
+ final Set<Path> filesToDelete = new HashSet<Path>();
+
+ synchronized (Tablet.this) {
+ Set<Path> absFilePaths = scanFileReservations.remove(reservationId);
+
+ if (absFilePaths == null)
+ throw new IllegalArgumentException("Unknown scan reservation id " + reservationId);
+
+ boolean notify = false;
+ for (Path path : absFilePaths) {
+ long refCount = fileScanReferenceCounts.decrement(path, 1);
+ if (refCount == 0) {
+ if (filesToDeleteAfterScan.remove(path))
+ filesToDelete.add(path);
+ notify = true;
+ } else if (refCount < 0)
+ throw new IllegalStateException("Scan ref count for " + path + " is " + refCount);
+ }
+
+ if (notify)
+ Tablet.this.notifyAll();
+ }
+
+ if (filesToDelete.size() > 0) {
+ log.debug("Removing scan refs from metadata " + extent + " " + abs2rel(filesToDelete));
+ MetadataTable.removeScanFiles(extent, abs2rel(filesToDelete), SecurityConstants.getSystemCredentials(), tabletServer.getLock());
+ }
+ }
+
+ private void removeFilesAfterScanRel(Set<String> relPaths) {
+ Set<Path> scanFiles = new HashSet<Path>();
+
+ for (String rpath : relPaths)
+ scanFiles.add(new Path(ServerConstants.getTablesDir() + "/" + extent.getTableId() + rpath));
+
+ removeFilesAfterScan(scanFiles);
+ }
+
+ private void removeFilesAfterScan(Set<Path> scanFiles) {
+ if (scanFiles.size() == 0)
+ return;
+
+ Set<Path> filesToDelete = new HashSet<Path>();
+
+ synchronized (Tablet.this) {
+ for (Path path : scanFiles) {
+ if (fileScanReferenceCounts.get(path) == 0)
+ filesToDelete.add(path);
+ else
+ filesToDeleteAfterScan.add(path);
+ }
+ }
+
+ if (filesToDelete.size() > 0) {
+ log.debug("Removing scan refs from metadata " + extent + " " + abs2rel(filesToDelete));
+ MetadataTable.removeScanFiles(extent, abs2rel(filesToDelete), SecurityConstants.getSystemCredentials(), tabletServer.getLock());
+ }
+ }
+
+ private TreeSet<Path> waitForScansToFinish(Set<Path> pathsToWaitFor, boolean blockNewScans, long maxWaitTime) {
+ long startTime = System.currentTimeMillis();
+ TreeSet<Path> inUse = new TreeSet<Path>();
+
+ Span waitForScans = Trace.start("waitForScans");
+ synchronized (Tablet.this) {
+ if (blockNewScans) {
+ if (reservationsBlocked)
+ throw new IllegalStateException();
+
+ reservationsBlocked = true;
+ }
+
+ for (Path path : pathsToWaitFor) {
+ while (fileScanReferenceCounts.get(path) > 0 && System.currentTimeMillis() - startTime < maxWaitTime) {
+ try {
+ Tablet.this.wait(100);
+ } catch (InterruptedException e) {
+ log.warn(e, e);
+ }
+ }
+ }
+
+ for (Path path : pathsToWaitFor) {
+ if (fileScanReferenceCounts.get(path) > 0)
+ inUse.add(path);
+ }
+
+ if (blockNewScans) {
+ reservationsBlocked = false;
+ Tablet.this.notifyAll();
+ }
+
+ }
+ waitForScans.stop();
+ return inUse;
+ }
+
+ public void importMapFiles(long tid, Map<String,DataFileValue> pathsString, boolean setTime) throws IOException {
+
+ String bulkDir = null;
+
+ Map<Path,DataFileValue> paths = new HashMap<Path,MetadataTable.DataFileValue>();
+ for (Entry<String,DataFileValue> entry : pathsString.entrySet())
+ paths.put(new Path(entry.getKey()), entry.getValue());
+
+ for (Path tpath : paths.keySet()) {
+
+ if (!tpath.getParent().getParent().equals(new Path(ServerConstants.getTablesDir() + "/" + extent.getTableId()))) {
+ throw new IOException("Map file " + tpath + " not in table dir " + ServerConstants.getTablesDir() + "/" + extent.getTableId());
+ }
+
+ if (bulkDir == null)
+ bulkDir = tpath.getParent().toString();
+ else if (!bulkDir.equals(tpath.getParent().toString()))
+ throw new IllegalArgumentException("bulk files in different dirs " + bulkDir + " " + tpath);
+
+ }
+
+ if (extent.isRootTablet()) {
+ throw new IllegalArgumentException("Can not import files to root tablet");
+ }
+
+ synchronized (bulkFileImportLock) {
+ TCredentials auths = SecurityConstants.getSystemCredentials();
+ Connector conn;
+ try {
+ conn = HdfsZooInstance.getInstance().getConnector(auths.getPrincipal(), CredentialHelper.extractToken(auths));
+ } catch (Exception ex) {
+ throw new IOException(ex);
+ }
+ // Remove any bulk files we've previously loaded and compacted away
+ List<String> files = MetadataTable.getBulkFilesLoaded(conn, extent, tid);
+ for (String file : files)
+ if (paths.keySet().remove(new Path(ServerConstants.getTablesDir() + "/" + extent.getTableId() + file)))
+ log.debug("Ignoring request to re-import a file already imported: " + extent + ": " + file);
+
+ if (paths.size() > 0) {
+ long bulkTime = Long.MIN_VALUE;
+ if (setTime) {
+ for (DataFileValue dfv : paths.values()) {
+ long nextTime = tabletTime.getAndUpdateTime();
+ if (nextTime < bulkTime)
+ throw new IllegalStateException("Time went backwards unexpectedly " + nextTime + " " + bulkTime);
+ bulkTime = nextTime;
+ dfv.setTime(bulkTime);
+ }
+ }
+
+ synchronized (timeLock) {
+ if (bulkTime > persistedTime)
+ persistedTime = bulkTime;
+
+ MetadataTable.updateTabletDataFile(tid, extent, abs2rel(paths), tabletTime.getMetadataValue(persistedTime), auths, tabletServer.getLock());
+ }
+ }
+ }
+
+ synchronized (Tablet.this) {
+ for (Entry<Path,DataFileValue> tpath : paths.entrySet()) {
+ if (datafileSizes.containsKey(tpath.getKey())) {
+ log.error("Adding file that is already in set " + tpath.getKey());
+ }
+ datafileSizes.put(tpath.getKey(), tpath.getValue());
+
+ }
+
+ tabletResources.importedMapFiles();
+
+ computeNumEntries();
+ }
+
+ for (Path tpath : paths.keySet()) {
+ log.log(TLevel.TABLET_HIST, extent + " import " + abs2rel(tpath) + " " + paths.get(tpath));
+ }
+ }
+
+ String reserveMergingMinorCompactionFile() {
+ if (mergingMinorCompactionFile != null)
+ throw new IllegalStateException("Tried to reserve merging minor compaction file when already reserved : " + mergingMinorCompactionFile);
+
+ if (extent.isRootTablet())
+ return null;
+
+ int maxFiles = acuTableConf.getMaxFilesPerTablet();
+
+ // when a major compaction is running and we are at max files, write out
+ // one extra file... want to avoid the case where major compaction is
+ // compacting everything except for the largest file, and therefore the
+ // largest file is returned for merging.. the following check mostly
+ // avoids this case, except for the case where major compactions fail or
+ // are canceled
+ if (majorCompactingFiles.size() > 0 && datafileSizes.size() == maxFiles)
+ return null;
+
+ if (datafileSizes.size() >= maxFiles) {
+ // find the smallest file
+
+ long min = Long.MAX_VALUE;
+ Path minName = null;
+
+ for (Entry<Path,DataFileValue> entry : datafileSizes.entrySet()) {
+ if (entry.getValue().getSize() < min && !majorCompactingFiles.contains(entry.getKey())) {
+ min = entry.getValue().getSize();
+ minName = entry.getKey();
+ }
+ }
+
+ if (minName == null)
+ return null;
+
+ mergingMinorCompactionFile = minName;
+ return minName.toString();
+ }
+
+ return null;
+ }
+
+ void unreserveMergingMinorCompactionFile(Path file) {
+ if ((file == null && mergingMinorCompactionFile != null) || (file != null && mergingMinorCompactionFile == null)
+ || (file != null && mergingMinorCompactionFile != null && !file.equals(mergingMinorCompactionFile)))
+ throw new IllegalStateException("Disagreement " + file + " " + mergingMinorCompactionFile);
+
+ mergingMinorCompactionFile = null;
+ }
+
+ void bringMinorCompactionOnline(String tmpDatafile, String newDatafile, String absMergeFile, DataFileValue dfv, CommitSession commitSession, long flushId) {
+ bringMinorCompactionOnline(new Path(tmpDatafile), new Path(newDatafile), absMergeFile == null ? null : new Path(absMergeFile), dfv, commitSession,
+ flushId);
+ }
+
+ void bringMinorCompactionOnline(Path tmpDatafile, Path newDatafile, Path absMergeFile, DataFileValue dfv, CommitSession commitSession, long flushId) {
+
+ IZooReaderWriter zoo = ZooReaderWriter.getRetryingInstance();
+ if (extent.isRootTablet()) {
+ try {
+ if (!zoo.isLockHeld(tabletServer.getLock().getLockID())) {
+ throw new IllegalStateException();
+ }
+ } catch (Exception e) {
+ throw new IllegalStateException("Can not bring major compaction online, lock not held", e);
+ }
+ }
+
+ // rename before putting in metadata table, so files in metadata table should
+ // always exist
+ do {
+ try {
+ if (dfv.getNumEntries() == 0) {
+ fs.delete(tmpDatafile, true);
+ } else {
+ if (fs.exists(newDatafile)) {
+ log.warn("Target map file already exist " + newDatafile);
+ fs.delete(newDatafile, true);
+ }
+
+ if (!fs.rename(tmpDatafile, newDatafile)) {
+ throw new IOException("rename fails");
+ }
+ }
+ break;
+ } catch (IOException ioe) {
+ log.warn("Tablet " + extent + " failed to rename " + abs2rel(newDatafile) + " after MinC, will retry in 60 secs...", ioe);
+ UtilWaitThread.sleep(60 * 1000);
+ }
+ } while (true);
+
+ long t1, t2;
+
+ // the code below always assumes merged files are in use by scans... this must be done
+ // because the in memory list of files is not updated until after the metadata table
+ // therefore the file is available to scans until memory is updated, but want to ensure
+ // the file is not available for garbage collection... if memory were updated
+ // before this point (like major compactions do), then the following code could wait
+ // for scans to finish like major compactions do.... used to wait for scans to finish
+ // here, but that was incorrect because a scan could start after waiting but before
+ // memory was updated... assuming the file is always in use by scans leads to
+ // one uneeded metadata update when it was not actually in use
+ Set<Path> filesInUseByScans = Collections.emptySet();
+ if (absMergeFile != null)
+ filesInUseByScans = Collections.singleton(absMergeFile);
+
+ // very important to write delete entries outside of log lock, because
+ // this !METADATA write does not go up... it goes sideways or to itself
+ if (absMergeFile != null)
+ MetadataTable.addDeleteEntries(extent, Collections.singleton(abs2rel(absMergeFile)), SecurityConstants.getSystemCredentials());
+
+ Set<String> unusedWalLogs = beginClearingUnusedLogs();
+ try {
+ // the order of writing to !METADATA and walog is important in the face of machine/process failures
+ // need to write to !METADATA before writing to walog, when things are done in the reverse order
+ // data could be lost... the minor compaction start even should be written before the following metadata
+ // write is made
+ TCredentials creds = SecurityConstants.getSystemCredentials();
+
+ synchronized (timeLock) {
+ if (commitSession.getMaxCommittedTime() > persistedTime)
+ persistedTime = commitSession.getMaxCommittedTime();
+
+ String time = tabletTime.getMetadataValue(persistedTime);
+ MetadataTable.updateTabletDataFile(extent, abs2rel(newDatafile), abs2rel(absMergeFile), dfv, time, creds, abs2rel(filesInUseByScans),
+ tabletServer.getClientAddressString(), tabletServer.getLock(), unusedWalLogs, lastLocation, flushId);
+ }
+
+ } finally {
+ finishClearingUnusedLogs();
+ }
+
+ do {
+ try {
+ // the purpose of making this update use the new commit session, instead of the old one passed in,
+ // is because the new one will reference the logs used by current memory...
+
+ tabletServer.minorCompactionFinished(tabletMemory.getCommitSession(), newDatafile.toString(), commitSession.getWALogSeq() + 2);
+ break;
+ } catch (IOException e) {
+ log.error("Failed to write to write-ahead log " + e.getMessage() + " will retry", e);
+ UtilWaitThread.sleep(1 * 1000);
+ }
+ } while (true);
+
+ synchronized (Tablet.this) {
+ lastLocation = null;
+
+ t1 = System.currentTimeMillis();
+ if (datafileSizes.containsKey(newDatafile)) {
+ log.error("Adding file that is already in set " + newDatafile);
+ }
+
+ if (dfv.getNumEntries() > 0) {
+ datafileSizes.put(newDatafile, dfv);
+ }
+
+ if (absMergeFile != null) {
+ datafileSizes.remove(absMergeFile);
+ }
+
+ unreserveMergingMinorCompactionFile(absMergeFile);
+
+ dataSourceDeletions.incrementAndGet();
+ tabletMemory.finishedMinC();
+
+ lastFlushID = flushId;
+
+ computeNumEntries();
+ t2 = System.currentTimeMillis();
+ }
+
+ // must do this after list of files in memory is updated above
+ removeFilesAfterScan(filesInUseByScans);
+
+ if (absMergeFile != null)
+ log.log(TLevel.TABLET_HIST, extent + " MinC [" + abs2rel(absMergeFile) + ",memory] -> " + abs2rel(newDatafile));
+ else
+ log.log(TLevel.TABLET_HIST, extent + " MinC [memory] -> " + abs2rel(newDatafile));
+ log.debug(String.format("MinC finish lock %.2f secs %s", (t2 - t1) / 1000.0, getExtent().toString()));
+ if (dfv.getSize() > acuTableConf.getMemoryInBytes(Property.TABLE_SPLIT_THRESHOLD)) {
+ log.debug(String.format("Minor Compaction wrote out file larger than split threshold. split threshold = %,d file size = %,d",
+ acuTableConf.getMemoryInBytes(Property.TABLE_SPLIT_THRESHOLD), dfv.getSize()));
+ }
+
+ }
+
+ private Map<String,DataFileValue> abs2rel(Map<Path,DataFileValue> paths) {
+ TreeMap<String,DataFileValue> relMap = new TreeMap<String,MetadataTable.DataFileValue>();
+
+ for (Entry<Path,DataFileValue> entry : paths.entrySet())
+ relMap.put(abs2rel(entry.getKey()), entry.getValue());
+
+ return relMap;
+ }
+
+ private Set<String> abs2rel(Set<Path> absPaths) {
+ Set<String> relativePaths = new TreeSet<String>();
+ for (Path absPath : absPaths)
+ relativePaths.add(abs2rel(absPath));
+
+ return relativePaths;
+ }
+
+ private Set<Path> string2path(Set<String> strings) {
+ Set<Path> paths = new HashSet<Path>();
+ for (String path : strings)
+ paths.add(new Path(path));
+
+ return paths;
+ }
+
+ private String abs2rel(Path absPath) {
+ if (absPath == null)
+ return null;
+
+ if (absPath.getParent().getParent().getName().equals(extent.getTableId().toString()))
+ return "/" + absPath.getParent().getName() + "/" + absPath.getName();
+ else
+ return "../" + absPath.getParent().getParent().getName() + "/" + absPath.getParent().getName() + "/" + absPath.getName();
+ }
+
+ public void reserveMajorCompactingFiles(Set<String> files) {
+ if (majorCompactingFiles.size() != 0)
+ throw new IllegalStateException("Major compacting files not empty " + majorCompactingFiles);
+
+ Set<Path> mcf = string2path(files);
+ if (mergingMinorCompactionFile != null && mcf.contains(mergingMinorCompactionFile))
+ throw new IllegalStateException("Major compaction tried to resrve file in use by minor compaction " + mergingMinorCompactionFile);
+
+ majorCompactingFiles.addAll(mcf);
+ }
+
+ public void clearMajorCompactingFile() {
+ majorCompactingFiles.clear();
+ }
+
+ void bringMajorCompactionOnline(Set<String> oldDatafiles, String tmpDatafile, String newDatafile, Long compactionId, DataFileValue dfv) throws IOException {
+ bringMajorCompactionOnline(string2path(oldDatafiles), new Path(tmpDatafile), new Path(newDatafile), compactionId, dfv);
+ }
+
+ void bringMajorCompactionOnline(Set<Path> oldDatafiles, Path tmpDatafile, Path newDatafile, Long compactionId, DataFileValue dfv) throws IOException {
+ long t1, t2;
+
+ if (!extent.isRootTablet()) {
+
+ if (fs.exists(newDatafile)) {
+ log.error("Target map file already exist " + newDatafile, new Exception());
+ throw new IllegalStateException("Target map file already exist " + newDatafile);
+ }
+
+ // rename before putting in metadata table, so files in metadata table should
+ // always exist
+ if (!fs.rename(tmpDatafile, newDatafile))
+ log.warn("Rename of " + tmpDatafile + " to " + newDatafile + " returned false");
+
+ if (dfv.getNumEntries() == 0) {
+ fs.delete(newDatafile, true);
+ }
+ }
+
+ TServerInstance lastLocation = null;
+ synchronized (Tablet.this) {
+
+ t1 = System.currentTimeMillis();
+
+ IZooReaderWriter zoo = ZooReaderWriter.getRetryingInstance();
+
+ dataSourceDeletions.incrementAndGet();
+
+ if (extent.isRootTablet()) {
+
+ waitForScansToFinish(oldDatafiles, true, Long.MAX_VALUE);
+
+ try {
+ if (!zoo.isLockHeld(tabletServer.getLock().getLockID())) {
+ throw new IllegalStateException();
+ }
+ } catch (Exception e) {
+ throw new IllegalStateException("Can not bring major compaction online, lock not held", e);
+ }
+
+ // mark files as ready for deletion, but
+ // do not delete them until we successfully
+ // rename the compacted map file, in case
+ // the system goes down
+
+ String compactName = newDatafile.getName();
+
+ for (Path path : oldDatafiles) {
+ fs.rename(path, new Path(location + "/delete+" + compactName + "+" + path.getName()));
+ }
+
+ if (fs.exists(newDatafile)) {
+ log.error("Target map file already exist " + newDatafile, new Exception());
+ throw new IllegalStateException("Target map file already exist " + newDatafile);
+ }
+
+ if (!fs.rename(tmpDatafile, newDatafile))
+ log.warn("Rename of " + tmpDatafile + " to " + newDatafile + " returned false");
+
+ // start deleting files, if we do not finish they will be cleaned
+ // up later
+ Trash trash = new Trash(fs, fs.getConf());
+ for (Path path : oldDatafiles) {
+ Path deleteFile = new Path(location + "/delete+" + compactName + "+" + path.getName());
+ if (acuTableConf.getBoolean(Property.GC_TRASH_IGNORE) || !trash.moveToTrash(deleteFile))
+ fs.delete(deleteFile, true);
+ }
+ }
+
+ // atomically remove old files and add new file
+ for (Path oldDatafile : oldDatafiles) {
+ if (!datafileSizes.containsKey(oldDatafile)) {
+ log.error("file does not exist in set " + oldDatafile);
+ }
+ datafileSizes.remove(oldDatafile);
+ majorCompactingFiles.remove(oldDatafile);
+ }
+
+ if (datafileSizes.containsKey(newDatafile)) {
+ log.error("Adding file that is already in set " + newDatafile);
+ }
+
+ if (dfv.getNumEntries() > 0) {
+ datafileSizes.put(newDatafile, dfv);
+ }
+
+ // could be used by a follow on compaction in a multipass compaction
+ majorCompactingFiles.add(newDatafile);
+
+ computeNumEntries();
+
+ lastLocation = Tablet.this.lastLocation;
+ Tablet.this.lastLocation = null;
+
+ if (compactionId != null)
+ lastCompactID = compactionId;
+
+ t2 = System.currentTimeMillis();
+ }
+
+ if (!extent.isRootTablet()) {
+ Set<Path> filesInUseByScans = waitForScansToFinish(oldDatafiles, false, 10000);
+ if (filesInUseByScans.size() > 0)
+ log.debug("Adding scan refs to metadata " + extent + " " + abs2rel(filesInUseByScans));
+ MetadataTable.replaceDatafiles(extent, abs2rel(oldDatafiles), abs2rel(filesInUseByScans), abs2rel(newDatafile), compactionId, dfv,
+ SecurityConstants.getSystemCredentials(), tabletServer.getClientAddressString(), lastLocation, tabletServer.getLock());
+ removeFilesAfterScan(filesInUseByScans);
+ }
+
+ log.debug(String.format("MajC finish lock %.2f secs", (t2 - t1) / 1000.0));
+ log.log(TLevel.TABLET_HIST, extent + " MajC " + abs2rel(oldDatafiles) + " --> " + abs2rel(newDatafile));
+ }
+
+ public SortedMap<String,DataFileValue> getDatafileSizesRel() {
+ synchronized (Tablet.this) {
+ TreeMap<String,DataFileValue> files = new TreeMap<String,MetadataTable.DataFileValue>();
+ Set<Entry<Path,DataFileValue>> es = datafileSizes.entrySet();
+
+ for (Entry<Path,DataFileValue> entry : es) {
+ files.put(abs2rel(entry.getKey()), entry.getValue());
+ }
+
+ return Collections.unmodifiableSortedMap(files);
+ }
+ }
+
+ public SortedMap<String,DataFileValue> getDatafileSizes() {
+ synchronized (Tablet.this) {
+ TreeMap<String,DataFileValue> files = new TreeMap<String,MetadataTable.DataFileValue>();
+ Set<Entry<Path,DataFileValue>> es = datafileSizes.entrySet();
+
+ for (Entry<Path,DataFileValue> entry : es) {
+ files.put(entry.getKey().toString(), entry.getValue());
+ }
+
+ return Collections.unmodifiableSortedMap(files);
+ }
+ }
+
+ public Set<String> getFiles() {
+ synchronized (Tablet.this) {
+ HashSet<String> files = new HashSet<String>();
+ for (Path path : datafileSizes.keySet()) {
+ files.add(path.toString());
+ }
+ return Collections.unmodifiableSet(files);
+ }
+ }
+
+ }
+
+ public Tablet(TabletServer tabletServer, Text location, KeyExtent extent, TabletResourceManager trm, SortedMap<Key,Value> tabletsKeyValues)
+ throws IOException {
+ this(tabletServer, location, extent, trm, CachedConfiguration.getInstance(), tabletsKeyValues);
+ splitCreationTime = 0;
+ }
+
+ public Tablet(TabletServer tabletServer, Text location, KeyExtent extent, TabletResourceManager trm, SortedMap<String,DataFileValue> datafiles, String time,
+ long initFlushID, long initCompactID) throws IOException {
+ this(tabletServer, location, extent, trm, CachedConfiguration.getInstance(), datafiles, time, initFlushID, initCompactID);
+ splitCreationTime = System.currentTimeMillis();
+ }
+
+ private Tablet(TabletServer tabletServer, Text location, KeyExtent extent, TabletResourceManager trm, Configuration conf,
+ SortedMap<Key,Value> tabletsKeyValues) throws IOException {
+ this(tabletServer, location, extent, trm, conf, TraceFileSystem.wrap(FileUtil.getFileSystem(conf, ServerConfiguration.getSiteConfiguration())),
+ tabletsKeyValues);
+ }
+
+ static private final List<LogEntry> EMPTY = Collections.emptyList();
+
+ private Tablet(TabletServer tabletServer, Text location, KeyExtent extent, TabletResourceManager trm, Configuration conf,
+ SortedMap<String,DataFileValue> datafiles, String time, long initFlushID, long initCompactID) throws IOException {
+ this(tabletServer, location, extent, trm, conf, TraceFileSystem.wrap(FileUtil.getFileSystem(conf, ServerConfiguration.getSiteConfiguration())), EMPTY,
+ datafiles, time, null, new HashSet<String>(), initFlushID, initCompactID);
+ }
+
+ private static String lookupTime(AccumuloConfiguration conf, KeyExtent extent, SortedMap<Key,Value> tabletsKeyValues) {
+ SortedMap<Key,Value> entries;
+
+ if (extent.isRootTablet()) {
+ return null;
+ } else {
+ entries = new TreeMap<Key,Value>();
+ Text rowName = extent.getMetadataEntry();
+ for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
+ if (entry.getKey().compareRow(rowName) == 0 && Constants.METADATA_TIME_COLUMN.hasColumns(entry.getKey())) {
+ entries.put(new Key(entry.getKey()), new Value(entry.getValue()));
+ }
+ }
+ }
+
+ // log.debug("extent : "+extent+" entries : "+entries);
+
+ if (entries.size() == 1)
+ return entries.values().iterator().next().toString();
+ return null;
+ }
+
+ private static SortedMap<String,DataFileValue> lookupDatafiles(AccumuloConfiguration conf, Text locText, FileSystem fs, KeyExtent extent,
+ SortedMap<Key,Value> tabletsKeyValues) throws IOException {
+ Path location = new Path(ServerConstants.getTablesDir() + "/" + extent.getTableId().toString() + locText.toString());
+
+ TreeMap<String,DataFileValue> datafiles = new TreeMap<String,DataFileValue>();
+
+ if (extent.isRootTablet()) { // the meta0 tablet
+ // cleanUpFiles() has special handling for delete. files
+ FileStatus[] files = fs.listStatus(location);
+ Path[] paths = new Path[files.length];
+ for (int i = 0; i < files.length; i++) {
+ paths[i] = files[i].getPath();
+ }
+ Collection<String> goodPaths = cleanUpFiles(fs, files, location, true);
+ for (String path : goodPaths) {
+ String filename = new Path(path).getName();
+ DataFileValue dfv = new DataFileValue(0, 0);
+ datafiles.put(locText.toString() + "/" + filename, dfv);
+ }
+ } else {
+
+ SortedMap<Key,Value> datafilesMetadata;
+
+ Text rowName = extent.getMetadataEntry();
+
+ ScannerImpl mdScanner = new ScannerImpl(HdfsZooInstance.getInstance(), SecurityConstants.getSystemCredentials(), Constants.METADATA_TABLE_ID,
+ Constants.NO_AUTHS);
+
+ // Commented out because when no data file is present, each tablet will scan through metadata table and return nothing
+ // reduced batch size to improve performance
+ // changed here after endKeys were implemented from 10 to 1000
+ mdScanner.setBatchSize(1000);
+
+ // leave these in, again, now using endKey for safety
+ mdScanner.fetchColumnFamily(Constants.METADATA_DATAFILE_COLUMN_FAMILY);
+
+ mdScanner.setRange(new Range(rowName));
+
+ datafilesMetadata = new TreeMap<Key,Value>();
+
+ for (Entry<Key,Value> entry : mdScanner) {
+
+ if (entry.getKey().compareRow(rowName) != 0) {
+ break;
+ }
+
+ datafilesMetadata.put(new Key(entry.getKey()), new Value(entry.getValue()));
+ }
+
+ Iterator<Entry<Key,Value>> dfmdIter = datafilesMetadata.entrySet().iterator();
+
+ while (dfmdIter.hasNext()) {
+ Entry<Key,Value> entry = dfmdIter.next();
+
+ datafiles.put(entry.getKey().getColumnQualifier().toString(), new DataFileValue(entry.getValue().get()));
+ }
+ }
+ return datafiles;
+ }
+
+ private static List<LogEntry> lookupLogEntries(KeyExtent ke, SortedMap<Key,Value> tabletsKeyValues) {
+ List<LogEntry> logEntries = new ArrayList<LogEntry>();
+
+ if (ke.isMeta()) {
+ try {
+ logEntries = MetadataTable.getLogEntries(SecurityConstants.getSystemCredentials(), ke);
+ } catch (Exception ex) {
+ throw new RuntimeException("Unable to read tablet log entries", ex);
+ }
+ } else {
+ log.debug("Looking at metadata " + tabletsKeyValues);
+ Text row = ke.getMetadataEntry();
+ for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
+ Key key = entry.getKey();
+ if (key.getRow().equals(row)) {
+ if (key.getColumnFamily().equals(Constants.METADATA_LOG_COLUMN_FAMILY)) {
+ logEntries.add(MetadataTable.entryFromKeyValue(key, entry.getValue()));
+ }
+ }
+ }
+ }
+
+ log.debug("got " + logEntries + " for logs for " + ke);
+ return logEntries;
+ }
+
+ private static Set<String> lookupScanFiles(KeyExtent extent, SortedMap<Key,Value> tabletsKeyValues) {
+ HashSet<String> scanFiles = new HashSet<String>();
+
+ Text row = extent.getMetadataEntry();
+ for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
+ Key key = entry.getKey();
+ if (key.getRow().equals(row) && key.getColumnFamily().equals(Constants.METADATA_SCANFILE_COLUMN_FAMILY)) {
+ scanFiles.add(key.getColumnQualifier().toString());
+ }
+ }
+
+ return scanFiles;
+ }
+
+ private static long lookupFlushID(KeyExtent extent, SortedMap<Key,Value> tabletsKeyValues) {
+ Text row = extent.getMetadataEntry();
+ for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
+ Key key = entry.getKey();
+ if (key.getRow().equals(row) && Constants.METADATA_FLUSH_COLUMN.equals(key.getColumnFamily(), key.getColumnQualifier()))
+ return Long.parseLong(entry.getValue().toString());
+ }
+
+ return -1;
+ }
+
+ private static long lookupCompactID(KeyExtent extent, SortedMap<Key,Value> tabletsKeyValues) {
+ Text row = extent.getMetadataEntry();
+ for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
+ Key key = entry.getKey();
+ if (key.getRow().equals(row) && Constants.METADATA_COMPACT_COLUMN.equals(key.getColumnFamily(), key.getColumnQualifier()))
+ return Long.parseLong(entry.getValue().toString());
+ }
+
+ return -1;
+ }
+
+ private Tablet(TabletServer tabletServer, Text location, KeyExtent extent, TabletResourceManager trm, Configuration conf, FileSystem fs,
+ SortedMap<Key,Value> tabletsKeyValues) throws IOException {
+ this(tabletServer, location, extent, trm, conf, fs, lookupLogEntries(extent, tabletsKeyValues), lookupDatafiles(tabletServer.getSystemConfiguration(),
+ location, fs, extent, tabletsKeyValues), lookupTime(tabletServer.getSystemConfiguration(), extent, tabletsKeyValues), lookupLastServer(extent,
+ tabletsKeyValues), lookupScanFiles(extent, tabletsKeyValues), lookupFlushID(extent, tabletsKeyValues), lookupCompactID(extent, tabletsKeyValues));
+ }
+
+ private static TServerInstance lookupLastServer(KeyExtent extent, SortedMap<Key,Value> tabletsKeyValues) {
+ for (Entry<Key,Value> entry : tabletsKeyValues.entrySet()) {
+ if (entry.getKey().getColumnFamily().compareTo(Constants.METADATA_LAST_LOCATION_COLUMN_FAMILY) == 0) {
+ return new TServerInstance(entry.getValue(), entry.getKey().getColumnQualifier());
+ }
+ }
+ return null;
+ }
+
+ /**
+ * yet another constructor - this one allows us to avoid costly lookups into the Metadata table if we already know the files we need - as at split time
+ */
+ private Tablet(final TabletServer tabletServer, final Text location, final KeyExtent extent, final TabletResourceManager trm, final Configuration conf,
+ final FileSystem fs, final List<LogEntry> logEntries, final SortedMap<String,DataFileValue> datafiles, String time, final TServerInstance lastLocation,
+ Set<String> scanFiles, long initFlushID, long initCompactID) throws IOException {
+ this.location = new Path(ServerConstants.getTablesDir() + "/" + extent.getTableId().toString() + location.toString());
+ this.lastLocation = lastLocation;
+ this.tabletDirectory = location.toString();
+ this.conf = conf;
+ this.acuTableConf = tabletServer.getTableConfiguration(extent);
+
+ this.fs = fs;
+ this.extent = extent;
+ this.tabletResources = trm;
+
+ this.lastFlushID = initFlushID;
+ this.lastCompactID = initCompactID;
+
+ if (extent.isRootTablet()) {
+
+ long rtime = Long.MIN_VALUE;
+ for (String path : datafiles.keySet()) {
+ String filename = new Path(path).getName();
+
+ FileSKVIterator reader = FileOperations.getInstance().openReader(this.location + "/" + filename, true, fs, fs.getConf(),
+ tabletServer.getTableConfiguration(extent));
+ long maxTime = -1;
+ try {
+
+ while (reader.hasTop()) {
+ maxTime = Math.max(maxTime, reader.getTopKey().getTimestamp());
+ reader.next();
+ }
+
+ } finally {
+ reader.close();
+ }
+
+ if (maxTime > rtime) {
+ time = TabletTime.LOGICAL_TIME_ID + "" + maxTime;
+ rtime = maxTime;
+ }
+ }
+ }
+
+ this.tabletServer = tabletServer;
+ this.logId = tabletServer.createLogId(extent);
+
+ this.timer = new TabletStatsKeeper();
+
+ setupDefaultSecurityLabels(extent);
+
+ tabletMemory = new TabletMemory();
+ tabletTime = TabletTime.getInstance(time);
+ persistedTime = tabletTime.getTime();
+
+ acuTableConf.addObserver(configObserver = new ConfigurationObserver() {
+
+ private void reloadConstraints() {
+ constraintChecker.set(new ConstraintChecker(getTableConfiguration()));
+ }
+
+ public void propertiesChanged() {
+ reloadConstraints();
+
+ try {
+ setupDefaultSecurityLabels(extent);
+ } catch (Exception e) {
+ log.error("Failed to reload default security labels for extent: " + extent.toString());
+ }
+ }
+
+ public void propertyChanged(String prop) {
+ if (prop.startsWith(Property.TABLE_CONSTRAINT_PREFIX.getKey()))
+ reloadConstraints();
+ else if (prop.equals(Property.TABLE_DEFAULT_SCANTIME_VISIBILITY.getKey())) {
+ try {
+ log.info("Default security labels changed for extent: " + extent.toString());
+ setupDefaultSecurityLabels(extent);
+ } catch (Exception e) {
+ log.error("Failed to reload default security labels for extent: " + extent.toString());
+ }
+ }
+
+ }
+
+ public void sessionExpired() {
+ log.debug("Session expired, no longer updating per table props...");
+ }
+
+ });
+ // Force a load of any per-table properties
+ configObserver.propertiesChanged();
+
+ tabletResources.setTablet(this, acuTableConf);
+
+ if (!logEntries.isEmpty()) {
+ log.info("Starting Write-Ahead Log recovery for " + this.extent);
+ final long[] count = new long[2];
+ final CommitSession commitSession = tabletMemory.getCommitSession();
+ count[1] = Long.MIN_VALUE;
+ try {
+ Set<String> absPaths = new HashSet<String>();
+ for (String relPath : datafiles.keySet())
+ absPaths.add(rel2abs(relPath, extent));
+
+ tabletServer.recover(this, logEntries, absPaths, new MutationReceiver() {
+ public void receive(Mutation m) {
+ // LogReader.printMutation(m);
+ Collection<ColumnUpdate> muts = m.getUpdates();
+ for (ColumnUpdate columnUpdate : muts) {
+ if (!columnUpdate.hasTimestamp()) {
+ // if it is not a user set timestamp, it must have been set
+ // by the system
+ count[1] = Math.max(count[1], columnUpdate.getTimestamp());
+ }
+ }
+ tabletMemory.mutate(commitSession, Collections.singletonList(m));
+ count[0]++;
+ }
+ });
+
+ if (count[1] != Long.MIN_VALUE) {
+ tabletTime.useMaxTimeFromWALog(count[1]);
+ }
+ commitSession.updateMaxCommittedTime(tabletTime.getTime());
+
- tabletMemory.updateMemoryUsageStats();
-
+ if (count[0] == 0) {
+ MetadataTable.removeUnusedWALEntries(extent, logEntries, tabletServer.getLock());
+ logEntries.clear();
+ }
+
+ } catch (Throwable t) {
+ if (acuTableConf.getBoolean(Property.TABLE_FAILURES_IGNORE)) {
+ log.warn("Error recovering from log files: ", t);
+ } else {
+ throw new RuntimeException(t);
+ }
+ }
+ // make some closed references that represent the recovered logs
+ currentLogs = new HashSet<DfsLogger>();
+ for (LogEntry logEntry : logEntries) {
+ for (String log : logEntry.logSet) {
+ String[] parts = log.split("/", 2);
+ currentLogs.add(new DfsLogger(tabletServer.getServerConfig(), logEntry.server, parts[1]));
+ }
+ }
+
+ log.info("Write-Ahead Log recovery complete for " + this.extent + " (" + count[0] + " mutations applied, " + tabletMemory.getNumEntries()
+ + " entries created)");
+ }
+
+ String contextName = acuTableConf.get(Property.TABLE_CLASSPATH);
+ if (contextName != null && !contextName.equals("")) {
+ // initialize context classloader, instead of possibly waiting for it to initialize for a scan
+ // TODO this could hang, causing other tablets to fail to load - ACCUMULO-1292
+ AccumuloVFSClassLoader.getContextManager().getClassLoader(contextName);
+ }
+
+ // do this last after tablet is completely setup because it
+ // could cause major compaction to start
+ datafileManager = new DatafileManager(datafiles);
+
+ computeNumEntries();
+
+ datafileManager.removeFilesAfterScanRel(scanFiles);
+
+ // look for hints of a failure on the previous tablet server
+ if (!logEntries.isEmpty() || needsMajorCompaction(MajorCompactionReason.NORMAL)) {
+ // look for any temp files hanging around
+ removeOldTemporaryFiles();
+ }
+
+ // look for hints of a failure on the previous tablet server
+ if (!logEntries.isEmpty() || needsMajorCompaction(MajorCompactionReason.NORMAL)) {
+ // look for any temp files hanging around
+ removeOldTemporaryFiles();
+ }
+
+ log.log(TLevel.TABLET_HIST, extent + " opened ");
+ }
+
+ private void removeOldTemporaryFiles() {
+ // remove any temporary files created by a previous tablet server
+ try {
+ for (FileStatus tmp : fs.globStatus(new Path(location, "*_tmp"))){
+ try {
+ fs.delete(tmp.getPath(), true);
+ } catch (IOException ex) {
+ log.error("Unable to remove old temp file " + tmp.getPath() + ": " + ex);
+ }
+ }
+ } catch (IOException ex) {
+ log.error("Error scanning for old temp files in " + location);
+ }
+ }
+
+ private void setupDefaultSecurityLabels(KeyExtent extent) {
+ if (extent.isMeta()) {
+ defaultSecurityLabel = new byte[0];
+ } else {
+ try {
+ ColumnVisibility cv = new ColumnVisibility(acuTableConf.get(Property.TABLE_DEFAULT_SCANTIME_VISIBILITY));
+ this.defaultSecurityLabel = cv.getExpression();
+ } catch (Exception e) {
+ log.error(e, e);
+ this.defaultSecurityLabel = new byte[0];
+ }
+ }
+ }
+
+ private static Collection<String> cleanUpFiles(FileSystem fs, FileStatus[] files, Path location, boolean deleteTmp) throws IOException {
+ /*
+ * called in constructor and before major compactions
+ */
+ Collection<String> goodFiles = new ArrayList<String>(files.length);
+
+ for (FileStatus file : files) {
+
+ String path = file.getPath().toString();
+ String filename = file.getPath().getName();
+
+ // check for incomplete major compaction, this should only occur
+ // for root tablet
+ if (filename.startsWith("delete+")) {
+ String expectedCompactedFile = location.toString() + "/" + filename.split("\\+")[1];
+ if (fs.exists(new Path(expectedCompactedFile))) {
+ // compaction finished, but did not finish deleting compacted files.. so delete it
+ if (!fs.delete(file.getPath(), true))
+ log.warn("Delete of file: " + file.getPath().toString() + " return false");
+ continue;
+ }
+ // compaction did not finish, so put files back
+
+ // reset path and filename for rest of loop
+ filename = filename.split("\\+", 3)[2];
+ path = location + "/" + filename;
+
+ if (!fs.rename(file.getPath(), new Path(path)))
+ log.warn("Rename of " + file.getPath().toString() + " to " + path + " returned false");
+ }
+
+ if (filename.endsWith("_tmp")) {
+ if (deleteTmp) {
+ log.warn("cleaning up old tmp file: " + path);
+ if (!fs.delete(file.getPath(), true))
+ log.warn("Delete of tmp file: " + file.getPath().toString() + " return false");
+
+ }
+ continue;
+ }
+
+ if (!filename.startsWith(Constants.MAPFILE_EXTENSION + "_") && !FileOperations.getValidExtensions().contains(filename.split("\\.")[1])) {
+ log.error("unknown file in tablet" + path);
+ continue;
+ }
+
+ goodFiles.add(path);
+ }
+
+ return goodFiles;
+ }
+
+ public static class KVEntry extends KeyValue {
+ public KVEntry(Key k, Value v) {
+ super(new Key(k), Arrays.copyOf(v.get(), v.get().length));
+ }
+
+ public String toString() {
+ return key.toString() + "=" + getValue();
+ }
+
+ int numBytes() {
+ return key.getSize() + getValue().get().length;
+ }
+
+ int estimateMemoryUsed() {
+ return key.getSize() + getValue().get().length + (9 * 32); // overhead is 32 per object
+ }
+ }
+
+ private LookupResult lookup(SortedKeyValueIterator<Key,Value> mmfi, List<Range> ranges, HashSet<Column> columnSet, ArrayList<KVEntry> results,
+ long maxResultsSize) throws IOException {
+
+ LookupResult lookupResult = new LookupResult();
+
+ boolean exceededMemoryUsage = false;
+ boolean tabletClosed = false;
+
+ Set<ByteSequence> cfset = null;
+ if (columnSet.size() > 0)
+ cfset = LocalityGroupUtil.families(columnSet);
+
+ for (Range range : ranges) {
+
+ if (exceededMemoryUsage || tabletClosed) {
+ lookupResult.unfinishedRanges.add(range);
+ continue;
+ }
+
+ int entriesAdded = 0;
+
+ try {
+ if (cfset != null)
+ mmfi.seek(range, cfset, true);
+ else
+ mmfi.seek(range, LocalityGroupUtil.EMPTY_CF_SET, false);
+
+ while (mmfi.hasTop()) {
+ Key key = mmfi.getTopKey();
+
+ KVEntry kve = new KVEntry(key, mmfi.getTopValue());
+ results.add(kve);
+ entriesAdded++;
+ lookupResult.bytesAdded += kve.estimateMemoryUsed();
+ lookupResult.dataSize += kve.numBytes();
+
+ exceededMemoryUsage = lookupResult.bytesAdded > maxResultsSize;
+
+ if (exceededMemoryUsage) {
+ addUnfinishedRange(lookupResult, range, key, false);
+ break;
+ }
+
+ mmfi.next();
+ }
+
+ } catch (TooManyFilesException tmfe) {
+ // treat this as a closed tablet, and let the client retry
+ log.warn("Tablet " + getExtent() + " has too many files, batch lookup can not run");
+ handleTabletClosedDuringScan(results, lookupResult, exceededMemoryUsage, range, entriesAdded);
+ tabletClosed = true;
+ } catch (IOException ioe) {
+ if (shutdownInProgress()) {
+ // assume HDFS shutdown hook caused this exception
+ log.debug("IOException while shutdown in progress ", ioe);
+ handleTabletClosedDuringScan(results, lookupResult, exceededMemoryUsage, range, entriesAdded);
+ tabletClosed = true;
+ } else {
+ throw ioe;
+ }
+ } catch (IterationInterruptedException iie) {
+ if (isClosed()) {
+ handleTabletClosedDuringScan(results, lookupResult, exceededMemoryUsage, range, entriesAdded);
+ tabletClosed = true;
+ } else {
+ throw iie;
+ }
+ } catch (TabletClosedException tce) {
+ handleTabletClosedDuringScan(results, lookupResult, exceededMemoryUsage, range, entriesAdded);
+ tabletClosed = true;
+ }
+
+ }
+
+ return lookupResult;
+ }
+
+ private void handleTabletClosedDuringScan(ArrayList<KVEntry> results, LookupResult lookupResult, boolean exceededMemoryUsage, Range range, int entriesAdded) {
+ if (exceededMemoryUsage)
+ throw new IllegalStateException("tablet should not exceed memory usage or close, not both");
+
+ if (entriesAdded > 0)
+ addUnfinishedRange(lookupResult, range, results.get(results.size() - 1).key, false);
+ else
+ lookupResult.unfinishedRanges.add(range);
+
+ lookupResult.closed = true;
+ }
+
+ private void addUnfinishedRange(LookupResult lookupResult, Range range, Key key, boolean inclusiveStartKey) {
+ if (range.getEndKey() == null || key.compareTo(range.getEndKey()) < 0) {
+ Range nlur = new Range(new Key(key), inclusiveStartKey, range.getEndKey(), range.isEndKeyInclusive());
+ lookupResult.unfinishedRanges.add(nlur);
+ }
+ }
+
+ public static interface KVReceiver {
+ void receive(List<KVEntry> matches) throws IOException;
+ }
+
+ class LookupResult {
+ List<Range> unfinishedRanges = new ArrayList<Range>();
+ long bytesAdded = 0;
+ long dataSize = 0;
+ boolean closed = false;
+ }
+
+ public LookupResult lookup(List<Range> ranges, HashSet<Column> columns, Authorizations authorizations, ArrayList<KVEntry> results, long maxResultSize,
+ List<IterInfo> ssiList, Map<String,Map<String,String>> ssio, AtomicBoolean interruptFlag) throws IOException {
+
+ if (ranges.size() == 0) {
+ return new LookupResult();
+ }
+
+ ranges = Range.mergeOverlapping(ranges);
+ Collections.sort(ranges);
+
+ Range tabletRange = extent.toDataRange();
+ for (Range range : ranges) {
+ // do a test to see if this range falls within the tablet, if it does not
+ // then clip will throw an exception
+ tabletRange.clip(range);
+ }
+
+ ScanDataSource dataSource = new ScanDataSource(authorizations, this.defaultSecurityLabel, columns, ssiList, ssio, interruptFlag);
+
+ LookupResult result = null;
+
+ try {
+ SortedKeyValueIterator<Key,Value> iter = new SourceSwitchingIterator(dataSource);
+ result = lookup(iter, ranges, columns, results, maxResultSize);
+ return result;
+ } catch (IOException ioe) {
+ dataSource.close(true);
+ throw ioe;
+ } finally {
+ // code in finally block because always want
+ // to return mapfiles, even when exception is thrown
+ dataSource.close(false);
+
+ synchronized (this) {
+ queryCount += results.size();
+ if (result != null)
+ queryBytes += result.dataSize;
+ }
+ }
+ }
+
+ private Batch nextBatch(SortedKeyValueIterator<Key,Value> iter, Range range, int num, HashSet<Column> columns) throws IOException {
+
+ // log.info("In nextBatch..");
+
+ List<KVEntry> results = new ArrayList<KVEntry>();
+ Key key = null;
+
+ Value value;
+ long resultSize = 0L;
+ long resultBytes = 0L;
+
+ long maxResultsSize = acuTableConf.getMemoryInBytes(Property.TABLE_SCAN_MAXMEM);
+
+ if (columns.size() == 0) {
+ iter.seek(range, LocalityGroupUtil.EMPTY_CF_SET, false);
+ } else {
+ iter.seek(range, LocalityGroupUtil.families(columns), true);
+ }
+
+ Key continueKey = null;
+ boolean skipContinueKey = false;
+
+ boolean endOfTabletReached = false;
+ while (iter.hasTop()) {
+
+ value = (Value) iter.getTopValue();
+ key = iter.getTopKey();
+
+ KVEntry kvEntry = new KVEntry(key, value); // copies key and value
+ results.add(kvEntry);
+ resultSize += kvEntry.estimateMemoryUsed();
+ resultBytes += kvEntry.numBytes();
+
+ if (resultSize >= maxResultsSize || results.size() >= num) {
+ continueKey = new Key(key);
+ skipContinueKey = true;
+ break;
+ }
+
+ iter.next();
+ }
+
+ if (iter.hasTop() == false) {
+ endOfTabletReached = true;
+ }
+
+ Batch retBatch = new Batch();
+ retBatch.numBytes = resultBytes;
+
+ if (!endOfTabletReached) {
+ retBatch.continueKey = continueKey;
+ retBatch.skipContinueKey = skipContinueKey;
+ } else {
+ retBatch.continueKey = null;
+ }
+
+ if (endOfTabletReached && results.size() == 0)
+ retBatch.results = null;
+ else
+ retBatch.results = results;
+
+ return retBatch;
+ }
+
+ /**
+ * Determine if a JVM shutdown is in progress.
+ *
+ */
+ private boolean shutdownInProgress() {
+ try {
+ Runtime.getRuntime().removeShutdownHook(new Thread(new Runnable() {
+ @Override
+ public void run() {}
+ }));
+ } catch (IllegalStateException ise) {
+ return true;
+ }
+
+ return false;
+ }
+
+ private class Batch {
+ public boolean skipContinueKey;
+ public List<KVEntry> results;
+ public Key continueKey;
+ public long numBytes;
+ }
+
+ Scanner createScanner(Range range, int num, HashSet<Column> columns, Authorizations authorizations, List<IterInfo> ssiList,
+ Map<String,Map<String,String>> ssio, boolean isolated, AtomicBoolean interruptFlag) {
+ // do a test to see if this range falls within the tablet, if it does not
+ // then clip will throw an exception
+ extent.toDataRange().clip(range);
+
+ ScanOptions opts = new ScanOptions(num, authorizations, this.defaultSecurityLabel, columns, ssiList, ssio, interruptFlag, isolated);
+ return new Scanner(range, opts);
+ }
+
+ class ScanBatch {
+ boolean more;
+ List<KVEntry> results;
+
+ ScanBatch(List<KVEntry> results, boolean more) {
+ this.results = results;
+ this.more = more;
+ }
+ }
+
+ class Scanner {
+
+ private ScanOptions options;
+ private Range range;
+ private SortedKeyValueIterator<Key,Value> isolatedIter;
+ private ScanDataSource isolatedDataSource;
+ private boolean sawException = false;
+ private boolean scanClosed = false;
+
+ Scanner(Range range, ScanOptions options) {
+ this.range = range;
+ this.options = options;
+ }
+
+ synchronized ScanBatch read() throws IOException, TabletClosedException {
+
+ if (sawException)
+ throw new IllegalStateException("Tried to use scanner after exception occurred.");
+
+ if (scanClosed)
+ throw new IllegalStateException("Tried to use scanner after it was closed.");
+
+ Batch results = null;
+
+ ScanDataSource dataSource;
+
+ if (options.isolated) {
+ if (isolatedDataSource == null)
+ isolatedDataSource = new ScanDataSource(options);
+ dataSource = isolatedDataSource;
+ } else {
+ dataSource = new ScanDataSource(options);
+ }
+
+ try {
+
+ SortedKeyValueIterator<Key,Value> iter;
+
+ if (options.isolated) {
+ if (isolatedIter == null)
+ isolatedIter = new SourceSwitchingIterator(dataSource, true);
+ else
+ isolatedDataSource.fileManager.reattach();
+ iter = isolatedIter;
+ } else {
+ iter = new SourceSwitchingIterator(dataSource, false);
+ }
+
+ results = nextBatch(iter, range, options.num, options.columnSet);
+
+ if (results.results == null) {
+ range = null;
+ return new ScanBatch(new ArrayList<Tablet.KVEntry>(), false);
+ } else if (results.continueKey == null) {
+ return new ScanBatch(results.results, false);
+ } else {
+ range = new Range(results.continueKey, !results.skipContinueKey, range.getEndKey(), range.isEndKeyInclusive());
+ return new ScanBatch(results.results, true);
+ }
+
+ } catch (IterationInterruptedException iie) {
+ sawException = true;
+ if (isClosed())
+ throw new TabletClosedException(iie);
+ else
+ throw iie;
+ } catch (IOException ioe) {
+ if (shutdownInProgress()) {
+ log.debug("IOException while shutdown in progress ", ioe);
+ throw new TabletClosedException(ioe); // assume IOException was caused by execution of HDFS shutdown hook
+ }
+
+ sawException = true;
+ dataSource.close(true);
+ throw ioe;
+ } catch (RuntimeException re) {
+ sawException = true;
+ throw re;
+ } finally {
+ // code in finally block because always want
+ // to return mapfiles, even when exception is thrown
+ if (!options.isolated)
+ dataSource.close(false);
+ else if (dataSource.fileManager != null)
+ dataSource.fileManager.detach();
+
+ synchronized (Tablet.this) {
+ if (results != null && results.results != null) {
+ long more = results.results.size();
+ queryCount += more;
+ queryBytes += results.numBytes;
+ }
+ }
+ }
+ }
+
+ // close and read are synchronized because can not call close on the data source while it is in use
+ // this cloud lead to the case where file iterators that are in use by a thread are returned
+ // to the pool... this would be bad
+ void close() {
+ options.interruptFlag.set(true);
+ synchronized (this) {
+ scanClosed = true;
+ if (isolatedDataSource != null)
+ isolatedDataSource.close(false);
+ }
+ }
+ }
+
+ static class ScanOptions {
+
+ // scan options
+ Authorizations authorizations;
+ byte[] defaultLabels;
+ HashSet<Column> columnSet;
+ List<IterInfo> ssiList;
+ Map<String,Map<String,String>> ssio;
+ AtomicBoolean interruptFlag;
+ int num;
+ boolean isolated;
+
+ ScanOptions(int num, Authorizations authorizations, byte[] defaultLabels, HashSet<Column> columnSet, List<IterInfo> ssiList,
+ Map<String,Map<String,String>> ssio, AtomicBoolean interruptFlag, boolean isolated) {
+ this.num = num;
+ this.authorizations = authorizations;
+ this.defaultLabels = defaultLabels;
+ this.columnSet = columnSet;
+ this.ssiList = ssiList;
+ this.ssio = ssio;
+ this.interruptFlag = interruptFlag;
+ this.isolated = isolated;
+ }
+
+ }
+
+ class ScanDataSource implements DataSource {
+
+ // data source state
+ private ScanFileManager fileManager;
+ private SortedKeyValueIterator<Key,Value> iter;
+ private long expectedDeletionCount;
+ private List<MemoryIterator> memIters = null;
+ private long fileReservationId;
+ private AtomicBoolean interruptFlag;
+ private StatsIterator statsIterator;
+
+ ScanOptions options;
+
+ ScanDataSource(Authorizations authorizations, byte[] defaultLabels, HashSet<Column> columnSet, List<IterInfo> ssiList, Map<String,Map<String,String>> ssio,
+ AtomicBoolean interruptFlag) {
+ expectedDeletionCount = dataSourceDeletions.get();
+ this.options = new ScanOptions(-1, authorizations, defaultLabels, columnSet, ssiList, ssio, interruptFlag, false);
+ this.interruptFlag = interruptFlag;
+ }
+
+ ScanDataSource(ScanOptions options) {
+ expectedDeletionCount = dataSourceDeletions.get();
+ this.options = options;
+ this.interruptFlag = options.interruptFlag;
+ }
+
+ @Override
+ public DataSource getNewDataSource() {
+ if (!isCurrent()) {
+ // log.debug("Switching data sources during a scan");
+ if (memIters != null) {
+ tabletMemory.returnIterators(memIters);
+ memIters = null;
+ datafileManager.returnFilesForScan(fileReservationId);
+ fileReservationId = -1;
+ }
+
+ if (fileManager != null)
+ fileManager.releaseOpenFiles(false);
+
+ expectedDeletionCount = dataSourceDeletions.get();
+ iter = null;
+
+ return this;
+ } else
+ return this;
+ }
+
+ @Override
+ public boolean isCurrent() {
+ return expectedDeletionCount == dataSourceDeletions.get();
+ }
+
+ @Override
+ public SortedKeyValueIterator<Key,Value> iterator() throws IOException {
+ if (iter == null)
+ iter = createIterator();
+ return iter;
+ }
+
+ private SortedKeyValueIterator<Key,Value> createIterator() throws IOException {
+
+ Map<String,DataFileValue> files;
+
+ synchronized (Tablet.this) {
+
+ if (memIters != null)
+ throw new IllegalStateException("Tried to create new scan iterator w/o releasing memory");
+
+ if (Tablet.this.closed)
+ throw new TabletClosedException();
+
+ if (interruptFlag.get())
+ throw new IterationInterruptedException(extent.toString() + " " + interruptFlag.hashCode());
+
+ // only acquire the file manager when we know the tablet is open
+ if (fileManager == null) {
+ fileManager = tabletResources.newScanFileManager();
+ activeScans.add(this);
+ }
+
+ if (fileManager.getNumOpenFiles() != 0)
+ throw new IllegalStateException("Tried to create new scan iterator w/o releasing files");
+
+ // set this before trying to get iterators in case
+ // getIterators() throws an exception
+ expectedDeletionCount = dataSourceDeletions.get();
+
+ memIters = tabletMemory.getIterators();
+ Pair<Long,Map<String,DataFileValue>> reservation = datafileManager.reserveFilesForScan();
+ fileReservationId = reservation.getFirst();
+ files = reservation.getSecond();
+ }
+
+ Collection<InterruptibleIterator> mapfiles = fileManager.openFiles(files, options.isolated);
+
+ List<SortedKeyValueIterator<Key,Value>> iters = new ArrayList<SortedKeyValueIterator<Key,Value>>(mapfiles.size() + memIters.size());
+
+ iters.addAll(mapfiles);
+ iters.addAll(memIters);
+
+ for (SortedKeyValueIterator<Key,Value> skvi : iters)
+ ((InterruptibleIterator) skvi).setInterruptFlag(interruptFlag);
+
+ MultiIterator multiIter = new MultiIterator(iters, extent);
+
+ TabletIteratorEnvironment iterEnv = new TabletIteratorEnvironment(IteratorScope.scan, acuTableConf, fileManager, files);
+
+ statsIterator = new StatsIterator(multiIter, TabletServer.seekCount, scannedCount);
+
+ DeletingIterator delIter = new DeletingIterator(statsIterator, false);
+
+ ColumnFamilySkippingIterator cfsi = new ColumnFamilySkippingIterator(delIter);
+
+ ColumnQualifierFilter colFilter = new ColumnQualifierFilter(cfsi, options.columnSet);
+
+ VisibilityFilter visFilter = new VisibilityFilter(colFilter, options.authorizations, options.defaultLabels);
+
+ return iterEnv.getTopLevelIterator(IteratorUtil
+ .loadIterators(IteratorScope.scan, visFilter, extent, acuTableConf, options.ssiList, options.ssio, iterEnv));
+ }
+
+ private void close(boolean sawErrors) {
+
+ if (memIters != null) {
+ tabletMemory.returnIterators(memIters);
+ memIters = null;
+ datafileManager.returnFilesForScan(fileReservationId);
+ fileReservationId = -1;
+ }
+
+ synchronized (Tablet.this) {
+ activeScans.remove(this);
+ if (activeScans.size() == 0)
+ Tablet.this.notifyAll();
+ }
+
+ if (fileManager != null) {
+ fileManager.releaseOpenFiles(sawErrors);
+ fileManager = null;
+ }
+
+ if (statsIterator != null) {
+ statsIterator.report();
+ }
+
+ }
+
+ public void interrupt() {
+ interruptFlag.set(true);
+ }
+
+ @Override
+ public DataSource getDeepCopyDataSource(IteratorEnvironment env) {
+ throw new UnsupportedOperationException();
+ }
+
+ }
+
+ private DataFileValue minorCompact(Configuration conf, FileSystem fs, InMemoryMap memTable, String tmpDatafile, String newDatafile, String mergeFile,
+ boolean hasQueueTime, long queued, CommitSession commitSession, long flushId, MinorCompactionReason mincReason) {
+ boolean failed = false;
+ long start = System.currentTimeMillis();
+ timer.incrementStatusMinor();
+
+ long count = 0;
+
+ try {
+ Span span = Trace.start("write");
+ count = memTable.getNumEntries();
+
+ DataFileValue dfv = null;
+ if (mergeFile != null)
+ dfv = datafileManager.getDatafileSizes().get(mergeFile);
+
+ MinorCompactor compactor = new MinorCompactor(conf, fs, memTable, mergeFile, dfv, tmpDatafile, acuTableConf, extent, mincReason);
+ CompactionStats stats = compactor.call();
+
+ span.stop();
+ span = Trace.start("bringOnline");
+ datafileManager.bringMinorCompactionOnline(tmpDatafile, newDatafile, mergeFile, new DataFileValue(stats.getFileSize(), stats.getEntriesWritten()),
+ commitSession, flushId);
+ span.stop();
+ return new DataFileValue(stats.getFileSize(), stats.getEntriesWritten());
+ } catch (RuntimeException E) {
+ failed = true;
+ throw E;
+ } catch (Error E) {
+ // Weird errors like "OutOfMemoryError" when trying to create the thread for the compaction
+ failed = true;
+ throw new RuntimeException(E);
+ } finally {
+ try {
+ tabletMemory.finalizeMinC();
+ } catch (Throwable t) {
+ log.error("Failed to free tablet memory", t);
+ }
+
+ if (!failed) {
+ lastMinorCompactionFinishTime = System.currentTimeMillis();
+ }
+ if (tabletServer.mincMetrics.isEnabled())
+ tabletServer.mincMetrics.add(TabletServerMinCMetrics.minc, (lastMinorCompactionFinishTime - start));
+ if (hasQueueTime) {
+ timer.updateTime(Operation.MINOR, queued, start, count, failed);
+ if (tabletServer.mincMetrics.isEnabled())
+ tabletServer.mincMetrics.add(TabletServerMinCMetrics.queue, (start - queued));
+ } else
+ timer.updateTime(Operation.MINOR, start, count, failed);
+ }
+ }
+
+ private class MinorCompactionTask implements Runnable {
+
+ private long queued;
+ private CommitSession commitSession;
+ private DataFileValue stats;
+ private String mergeFile;
+ private long flushId;
+ private MinorCompactionReason mincReason;
+
+ MinorCompactionTask(String mergeFile, CommitSession commitSession, long flushId, MinorCompactionReason mincReason) {
+ queued = System.currentTimeMillis();
+ minorCompactionWaitingToStart = true;
+ this.commitSession = commitSession;
+ this.mergeFile = mergeFile;
+ this.flushId = flushId;
+ this.mincReason = mincReason;
+ }
+
+ public void run() {
+ minorCompactionWaitingToStart = false;
+ minorCompactionInProgress = true;
+ Span minorCompaction = Trace.on("minorCompaction");
+ try {
+ String newMapfileLocation = getNextMapFilename(mergeFile == null ? "F" : "M");
+ Span span = Trace.start("waitForCommits");
+ synchronized (Tablet.this) {
+ commitSession.waitForCommitsToFinish();
+ }
+ span.stop();
+ span = Trace.start("start");
+ while (true) {
+ try {
+ // the purpose of the minor compaction start event is to keep track of the filename... in the case
+ // where the metadata table write for the minor compaction finishes and the process dies before
+ // writing the minor compaction finish event, then the start event+filename in metadata table will
+ // prevent recovery of duplicate data... the minor compaction start event could be written at any time
+ // before the metadata write for the minor compaction
+ tabletServer.minorCompactionStarted(commitSession, commitSession.getWALogSeq() + 1, newMapfileLocation);
+ break;
+ } catch (IOException e) {
+ log.warn("Failed to write to write ahead log " + e.getMessage(), e);
+ }
+ }
+ span.stop();
+ span = Trace.start("compact");
+ this.stats = minorCompact(conf, fs, tabletMemory.getMinCMemTable(), newMapfileLocation + "_tmp", newMapfileLocation, mergeFile, true, queued,
+ commitSession, flushId, mincReason);
+ span.stop();
+
+ if (needsSplit()) {
+ tabletServer.executeSplit(Tablet.this);
+ } else {
+ initiateMajorCompaction(MajorCompactionReason.NORMAL);
+ }
+ } catch (Throwable t) {
+ log.error("Unknown error during minor compaction for extent: " + getExtent(), t);
+ throw new RuntimeException(t);
+ } finally {
+ minorCompactionInProgress = false;
+ minorCompaction.data("extent", extent.toString());
+ minorCompaction.data("numEntries", Long.toString(this.stats.getNumEntries()));
+ minorCompaction.data("size", Long.toString(this.stats.getSize()));
+ minorCompaction.stop();
+ }
+ }
+ }
+
+ private synchronized MinorCompactionTask prepareForMinC(long flushId, MinorCompactionReason mincRea
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