Revert "HBASE-19835 Use explicit casting to avoid side effects"

This reverts commit f1a8161.

 Conflicts:
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Segment.java

patch reverted changes that happened in parallel without explanation. see jira.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java

@@ -47,7 +47,7 @@
 @InterfaceAudience.Public
 public class Append extends Mutation {
   private static final Logger LOG = LoggerFactory.getLogger(Append.class);
-  private static final long HEAP_OVERHEAD = (long)ClassSize.REFERENCE + ClassSize.TIMERANGE;
+  private static final long HEAP_OVERHEAD = ClassSize.REFERENCE + ClassSize.TIMERANGE;
   private TimeRange tr = new TimeRange();
 
   /**

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java

@@ -66,7 +66,7 @@ public abstract class Mutation extends OperationWithAttributes implements Row, C
     HeapSize {
   public static final long MUTATION_OVERHEAD = ClassSize.align(
       // This
-      (long)ClassSize.OBJECT +
+      ClassSize.OBJECT +
       // row + OperationWithAttributes.attributes
       2 * ClassSize.REFERENCE +
       // Timestamp
@@ -791,10 +791,10 @@ Mutation add(Cell cell) throws IOException {
 
   private static final class CellWrapper implements ExtendedCell {
     private static final long FIXED_OVERHEAD = ClassSize.align(
-          (long)ClassSize.OBJECT              // object header
+      ClassSize.OBJECT              // object header
         + KeyValue.TIMESTAMP_SIZE       // timestamp
         + Bytes.SIZEOF_LONG             // sequence id
-        + 1L * ClassSize.REFERENCE);     // references to cell
+        + 1 * ClassSize.REFERENCE);     // references to cell
     private final Cell cell;
     private long sequenceId;
     private long timestamp;

hbase-common/src/main/java/org/apache/hadoop/hbase/IndividualBytesFieldCell.java

@@ -27,7 +27,7 @@
 public class IndividualBytesFieldCell implements ExtendedCell {
 
   private static final long FIXED_OVERHEAD = ClassSize.align(  // do alignment(padding gap)
-        (long)ClassSize.OBJECT              // object header
+        ClassSize.OBJECT              // object header
       + KeyValue.TIMESTAMP_TYPE_SIZE  // timestamp and type
       + Bytes.SIZEOF_LONG             // sequence id
       + 5 * ClassSize.REFERENCE);     // references to all byte arrays: row, family, qualifier, value, tags

hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java

@@ -1783,7 +1783,7 @@ private static class FirstOnRowColCell extends FirstOnRowCell {
         FirstOnRowCell.FIXED_HEAPSIZE
       + Bytes.SIZEOF_BYTE // flength
       + Bytes.SIZEOF_INT * 3 // foffset, qoffset, qlength
-      + (long)ClassSize.REFERENCE * 2; // fArray, qArray
+      + ClassSize.REFERENCE * 2; // fArray, qArray
     private final byte[] fArray;
     private final int foffset;
     private final byte flength;
@@ -1944,7 +1944,7 @@ public Type getType() {
   }
 
   private static class LastOnRowColCell extends LastOnRowCell {
-    private static final long FIXED_OVERHEAD = (long)LastOnRowCell.FIXED_OVERHEAD
+    private static final long FIXED_OVERHEAD = LastOnRowCell.FIXED_OVERHEAD
         + ClassSize.REFERENCE * 2 // fArray and qArray
         + Bytes.SIZEOF_INT * 3 // foffset, qoffset, qlength
         + Bytes.SIZEOF_BYTE; // flength

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactionPipeline.java

@@ -57,7 +57,7 @@ public class CompactionPipeline {
   private static final Logger LOG = LoggerFactory.getLogger(CompactionPipeline.class);
 
   public final static long FIXED_OVERHEAD = ClassSize
-      .align((long)ClassSize.OBJECT + (3 * ClassSize.REFERENCE) + Bytes.SIZEOF_LONG);
+      .align(ClassSize.OBJECT + (3 * ClassSize.REFERENCE) + Bytes.SIZEOF_LONG);
   public final static long DEEP_OVERHEAD = FIXED_OVERHEAD + (2 * ClassSize.LINKEDLIST);
 
   private final RegionServicesForStores region;

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java

@@ -447,7 +447,7 @@ void setReadsEnabled(boolean readsEnabled) {
     }
 
     static final long HEAP_SIZE = ClassSize.align(
-        (long)ClassSize.OBJECT + 5 * Bytes.SIZEOF_BOOLEAN);
+        ClassSize.OBJECT + 5 * Bytes.SIZEOF_BOOLEAN);
   }
 
   /**
@@ -7890,7 +7890,7 @@ void checkFamily(final byte [] family)
   }
 
   public static final long FIXED_OVERHEAD = ClassSize.align(
-      (long)ClassSize.OBJECT +
+      ClassSize.OBJECT +
       ClassSize.ARRAY +
       50 * ClassSize.REFERENCE + 3 * Bytes.SIZEOF_INT +
       (14 * Bytes.SIZEOF_LONG) +

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java

@@ -42,6 +42,7 @@
 import java.util.concurrent.Future;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 import java.util.function.Predicate;
@@ -149,8 +150,8 @@ public class HStore implements Store, HeapSize, StoreConfigInformation, Propagat
   volatile boolean forceMajor = false;
   /* how many bytes to write between status checks */
   static int closeCheckInterval = 0;
-  private volatile long storeSize = 0L;
-  private volatile long totalUncompressedBytes = 0L;
+  private AtomicLong storeSize = new AtomicLong();
+  private AtomicLong totalUncompressedBytes = new AtomicLong();
 
   /**
    * RWLock for store operations.
@@ -209,13 +210,13 @@ public class HStore implements Store, HeapSize, StoreConfigInformation, Propagat
   private int compactionCheckMultiplier;
   protected Encryption.Context cryptoContext = Encryption.Context.NONE;
 
-  private volatile long flushedCellsCount = 0;
-  private volatile long compactedCellsCount = 0;
-  private volatile long majorCompactedCellsCount = 0;
-  private volatile long flushedCellsSize = 0;
-  private volatile long flushedOutputFileSize = 0;
-  private volatile long compactedCellsSize = 0;
-  private volatile long majorCompactedCellsSize = 0;
+  private AtomicLong flushedCellsCount = new AtomicLong();
+  private AtomicLong compactedCellsCount = new AtomicLong();
+  private AtomicLong majorCompactedCellsCount = new AtomicLong();
+  private AtomicLong flushedCellsSize = new AtomicLong();
+  private AtomicLong flushedOutputFileSize = new AtomicLong();
+  private AtomicLong compactedCellsSize = new AtomicLong();
+  private AtomicLong majorCompactedCellsSize = new AtomicLong();
 
   /**
    * Constructor
@@ -544,8 +545,9 @@ private List<HStoreFile> openStoreFiles(Collection<StoreFileInfo> files) throws
           HStoreFile storeFile = completionService.take().get();
           if (storeFile != null) {
             long length = storeFile.getReader().length();
-            this.storeSize += length;
-            this.totalUncompressedBytes += storeFile.getReader().getTotalUncompressedBytes();
+            this.storeSize.addAndGet(length);
+            this.totalUncompressedBytes
+                .addAndGet(storeFile.getReader().getTotalUncompressedBytes());
             LOG.debug("loaded {}", storeFile);
             results.add(storeFile);
           }
@@ -844,8 +846,8 @@ public void bulkLoadHFile(StoreFileInfo fileInfo) throws IOException {
 
   private void bulkLoadHFile(HStoreFile sf) throws IOException {
     StoreFileReader r = sf.getReader();
-    this.storeSize += r.length();
-    this.totalUncompressedBytes += r.getTotalUncompressedBytes();
+    this.storeSize.addAndGet(r.length());
+    this.totalUncompressedBytes.addAndGet(r.getTotalUncompressedBytes());
 
     // Append the new storefile into the list
     this.lock.writeLock().lock();
@@ -1021,8 +1023,8 @@ private HStoreFile commitFile(Path path, long logCacheFlushId, MonitoredTask sta
     HStoreFile sf = createStoreFileAndReader(dstPath);
 
     StoreFileReader r = sf.getReader();
-    this.storeSize += r.length();
-    this.totalUncompressedBytes += r.getTotalUncompressedBytes();
+    this.storeSize.addAndGet(r.length());
+    this.totalUncompressedBytes.addAndGet(r.getTotalUncompressedBytes());
 
     if (LOG.isInfoEnabled()) {
       LOG.info("Added " + sf + ", entries=" + r.getEntries() +
@@ -1373,11 +1375,11 @@ protected List<HStoreFile> doCompaction(CompactionRequestImpl cr,
     writeCompactionWalRecord(filesToCompact, sfs);
     replaceStoreFiles(filesToCompact, sfs);
     if (cr.isMajor()) {
-      majorCompactedCellsCount += getCompactionProgress().getTotalCompactingKVs();
-      majorCompactedCellsSize += getCompactionProgress().totalCompactedSize;
+      majorCompactedCellsCount.addAndGet(getCompactionProgress().getTotalCompactingKVs());
+      majorCompactedCellsSize.addAndGet(getCompactionProgress().totalCompactedSize);
     } else {
-      compactedCellsCount += getCompactionProgress().getTotalCompactingKVs();
-      compactedCellsSize += getCompactionProgress().totalCompactedSize;
+      compactedCellsCount.addAndGet(getCompactionProgress().getTotalCompactingKVs());
+      compactedCellsSize.addAndGet(getCompactionProgress().totalCompactedSize);
     }
     long outputBytes = getTotalSize(sfs);
 
@@ -1449,7 +1451,9 @@ void replaceStoreFiles(Collection<HStoreFile> compactedFiles, Collection<HStoreF
     this.lock.writeLock().lock();
     try {
       this.storeEngine.getStoreFileManager().addCompactionResults(compactedFiles, result);
-      filesCompacting.removeAll(compactedFiles); // safe bc: lock.writeLock();
+      synchronized (filesCompacting) {
+        filesCompacting.removeAll(compactedFiles);
+      }
     } finally {
       this.lock.writeLock().unlock();
     }
@@ -1478,7 +1482,7 @@ private void logCompactionEndMessage(
       }
     }
     message.append("total size for store is ")
-      .append(StringUtils.TraditionalBinaryPrefix.long2String(storeSize, "", 1))
+      .append(StringUtils.TraditionalBinaryPrefix.long2String(storeSize.get(), "", 1))
       .append(". This selection was in queue for ")
       .append(StringUtils.formatTimeDiff(compactionStartTime, cr.getSelectionTime()))
       .append(", and took ").append(StringUtils.formatTimeDiff(now, compactionStartTime))
@@ -1772,7 +1776,8 @@ private void removeUnneededFiles() throws IOException {
     completeCompaction(delSfs);
     LOG.info("Completed removal of " + delSfs.size() + " unnecessary (expired) file(s) in "
         + this + " of " + this.getRegionInfo().getRegionNameAsString()
-        + "; total size for store is " + TraditionalBinaryPrefix.long2String(storeSize, "", 1));
+        + "; total size for store is "
+        + TraditionalBinaryPrefix.long2String(storeSize.get(), "", 1));
   }
 
   public void cancelRequestedCompaction(CompactionContext compaction) {
@@ -1826,16 +1831,16 @@ private void validateStoreFile(Path path) throws IOException {
   @VisibleForTesting
   protected void completeCompaction(Collection<HStoreFile> compactedFiles)
     throws IOException {
-    this.storeSize = 0L;
-    this.totalUncompressedBytes = 0L;
+    this.storeSize.set(0L);
+    this.totalUncompressedBytes.set(0L);
     for (HStoreFile hsf : this.storeEngine.getStoreFileManager().getStorefiles()) {
       StoreFileReader r = hsf.getReader();
       if (r == null) {
         LOG.warn("StoreFile {} has a null Reader", hsf);
         continue;
       }
-      this.storeSize += r.length();
-      this.totalUncompressedBytes += r.getTotalUncompressedBytes();
+      this.storeSize.addAndGet(r.length());
+      this.totalUncompressedBytes.addAndGet(r.getTotalUncompressedBytes());
     }
   }
 
@@ -1896,7 +1901,7 @@ public long getLastCompactSize() {
 
   @Override
   public long getSize() {
-    return storeSize;
+    return storeSize.get();
   }
 
   public void triggerMajorCompaction() {
@@ -2043,7 +2048,7 @@ public long getNumHFiles() {
 
   @Override
   public long getStoreSizeUncompressed() {
-    return this.totalUncompressedBytes;
+    return this.totalUncompressedBytes.get();
   }
 
   @Override
@@ -2235,9 +2240,9 @@ public boolean commit(MonitoredTask status) throws IOException {
         committedFiles.add(sf.getPath());
       }
 
-      HStore.this.flushedCellsCount += cacheFlushCount;
-      HStore.this.flushedCellsSize += cacheFlushSize;
-      HStore.this.flushedOutputFileSize += outputFileSize;
+      HStore.this.flushedCellsCount.addAndGet(cacheFlushCount);
+      HStore.this.flushedCellsSize.addAndGet(cacheFlushSize);
+      HStore.this.flushedOutputFileSize.addAndGet(outputFileSize);
 
       // Add new file to store files.  Clear snapshot too while we have the Store write lock.
       return HStore.this.updateStorefiles(storeFiles, snapshot.getId());
@@ -2270,8 +2275,9 @@ public void replayFlush(List<String> fileNames, boolean dropMemstoreSnapshot)
         StoreFileInfo storeFileInfo = fs.getStoreFileInfo(getColumnFamilyName(), file);
         HStoreFile storeFile = createStoreFileAndReader(storeFileInfo);
         storeFiles.add(storeFile);
-        HStore.this.storeSize += storeFile.getReader().length();
-        HStore.this.totalUncompressedBytes += storeFile.getReader().getTotalUncompressedBytes();
+        HStore.this.storeSize.addAndGet(storeFile.getReader().length());
+        HStore.this.totalUncompressedBytes
+            .addAndGet(storeFile.getReader().getTotalUncompressedBytes());
         if (LOG.isInfoEnabled()) {
           LOG.info("Region: " + HStore.this.getRegionInfo().getEncodedName() +
             " added " + storeFile + ", entries=" + storeFile.getReader().getEntries() +
@@ -2302,7 +2308,11 @@ public void abort() throws IOException {
 
   @Override
   public boolean needsCompaction() {
-    return this.storeEngine.needsCompaction(this.filesCompacting);
+    List<HStoreFile> filesCompactingClone = null;
+    synchronized (filesCompacting) {
+      filesCompactingClone = Lists.newArrayList(filesCompacting);
+    }
+    return this.storeEngine.needsCompaction(filesCompactingClone);
   }
 
   /**
@@ -2315,7 +2325,7 @@ public CacheConfig getCacheConfig() {
   }
 
   public static final long FIXED_OVERHEAD =
-      ClassSize.align((long)ClassSize.OBJECT + (17 * ClassSize.REFERENCE) + (11 * Bytes.SIZEOF_LONG)
+      ClassSize.align(ClassSize.OBJECT + (26 * ClassSize.REFERENCE) + (2 * Bytes.SIZEOF_LONG)
               + (5 * Bytes.SIZEOF_INT) + (2 * Bytes.SIZEOF_BOOLEAN));
 
   public static final long DEEP_OVERHEAD = ClassSize.align(FIXED_OVERHEAD
@@ -2354,37 +2364,37 @@ public boolean hasTooManyStoreFiles() {
 
   @Override
   public long getFlushedCellsCount() {
-    return flushedCellsCount;
+    return flushedCellsCount.get();
   }
 
   @Override
   public long getFlushedCellsSize() {
-    return flushedCellsSize;
+    return flushedCellsSize.get();
   }
 
   @Override
   public long getFlushedOutputFileSize() {
-    return flushedOutputFileSize;
+    return flushedOutputFileSize.get();
   }
 
   @Override
   public long getCompactedCellsCount() {
-    return compactedCellsCount;
+    return compactedCellsCount.get();
   }
 
   @Override
   public long getCompactedCellsSize() {
-    return compactedCellsSize;
+    return compactedCellsSize.get();
   }
 
   @Override
   public long getMajorCompactedCellsCount() {
-    return majorCompactedCellsCount;
+    return majorCompactedCellsCount.get();
   }
 
   @Override
   public long getMajorCompactedCellsSize() {
-    return majorCompactedCellsSize;
+    return majorCompactedCellsSize.get();
   }
 
   /**

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreCompactor.java

@@ -48,7 +48,7 @@
 public class MemStoreCompactor {
 
   public static final long DEEP_OVERHEAD = ClassSize
-      .align((long)ClassSize.OBJECT + 4 * ClassSize.REFERENCE
+      .align(ClassSize.OBJECT + 4 * ClassSize.REFERENCE
           // compactingMemStore, versionedList, isInterrupted, strategy (the reference)
           // "action" is an enum and thus it is a class with static final constants,
           // so counting only the size of the reference to it and not the size of the internals

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java

@@ -291,7 +291,7 @@ public String toString() {
   }
 
   public static final long FIXED_SIZE = ClassSize.align(
-      (long)ClassSize.OBJECT +
+      ClassSize.OBJECT +
       2 * Bytes.SIZEOF_LONG +
       2 * ClassSize.REFERENCE);
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanInfo.java

@@ -51,7 +51,7 @@ public class ScanInfo {
   private final long preadMaxBytes;
   private final boolean newVersionBehavior;
 
-  public static final long FIXED_OVERHEAD = ClassSize.align((long)ClassSize.OBJECT
+  public static final long FIXED_OVERHEAD = ClassSize.align(ClassSize.OBJECT
       + (2 * ClassSize.REFERENCE) + (2 * Bytes.SIZEOF_INT)
       + (4 * Bytes.SIZEOF_LONG) + (4 * Bytes.SIZEOF_BOOLEAN));
 

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java

@@ -751,7 +751,7 @@ boolean isLowReplicationRollEnabled() {
   }
 
   public static final long FIXED_OVERHEAD = ClassSize
-      .align((long)ClassSize.OBJECT + (5 * ClassSize.REFERENCE) + ClassSize.ATOMIC_INTEGER
+      .align(ClassSize.OBJECT + (5 * ClassSize.REFERENCE) + ClassSize.ATOMIC_INTEGER
           + Bytes.SIZEOF_INT + (3 * Bytes.SIZEOF_LONG));
 
   /**

hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALSplitter.java

@@ -980,7 +980,7 @@ long appendEntry(Entry entry) {
       internify(entry);
       entryBuffer.add(entry);
       long incrHeap = entry.getEdit().heapSize() +
-        ClassSize.align(2L * ClassSize.REFERENCE) + // WALKey pointers
+        ClassSize.align(2 * ClassSize.REFERENCE) + // WALKey pointers
         0; // TODO linkedlist entry
       heapInBuffer += incrHeap;
       return incrHeap;