HBASE-15322 Operations using Unsafe path broken for platforms not having sun.misc.Unsafe.

hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java

@@ -34,6 +34,7 @@ import org.apache.hadoop.hbase.util.ByteStringer;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.util.UnsafeAccess;
+import org.apache.hadoop.hbase.util.UnsafeAvailChecker;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.protobuf.InvalidProtocolBufferException;
@@ -59,6 +60,7 @@ import com.google.protobuf.InvalidProtocolBufferException;
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class FuzzyRowFilter extends FilterBase {
+  private static final boolean UNSAFE_UNALIGNED = UnsafeAvailChecker.unaligned();
   private List<Pair<byte[], byte[]>> fuzzyKeysData;
   private boolean done = false;
 
@@ -93,7 +95,7 @@ public class FuzzyRowFilter extends FilterBase {
   }
 
   private void preprocessSearchKey(Pair<byte[], byte[]> p) {
-    if (UnsafeAccess.unaligned() == false) {
+    if (!UNSAFE_UNALIGNED) {
       return;
     }
     byte[] key = p.getFirst();
@@ -111,7 +113,7 @@ public class FuzzyRowFilter extends FilterBase {
    * @return mask array
    */
   private byte[] preprocessMask(byte[] mask) {
-    if (UnsafeAccess.unaligned() == false) {
+    if (!UNSAFE_UNALIGNED) {
       return mask;
     }
     if (isPreprocessedMask(mask)) return mask;
@@ -316,7 +318,7 @@ public class FuzzyRowFilter extends FilterBase {
   static SatisfiesCode satisfies(boolean reverse, byte[] row, int offset, int length,
       byte[] fuzzyKeyBytes, byte[] fuzzyKeyMeta) {
 
-    if (UnsafeAccess.unaligned() == false) {
+    if (!UNSAFE_UNALIGNED) {
       return satisfiesNoUnsafe(reverse, row, offset, length, fuzzyKeyBytes, fuzzyKeyMeta);
     }
 

hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java

@@ -41,8 +41,7 @@ public final class ByteBufferUtils {
   private final static int VALUE_MASK = 0x7f;
   private final static int NEXT_BIT_SHIFT = 7;
   private final static int NEXT_BIT_MASK = 1 << 7;
-  private static final boolean UNSAFE_AVAIL = UnsafeAccess.isAvailable();
-  private static final boolean UNSAFE_UNALIGNED = UnsafeAccess.unaligned();
+  private static final boolean UNSAFE_AVAIL = UnsafeAvailChecker.isAvailable();
 
   private ByteBufferUtils() {
   }

hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java

@@ -24,14 +24,11 @@ import static com.google.common.base.Preconditions.checkPositionIndex;
 import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
-import java.lang.reflect.Field;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.nio.charset.Charset;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
 import java.security.SecureRandom;
 import java.util.Arrays;
 import java.util.Collection;
@@ -132,7 +129,8 @@ public class Bytes {
   // SizeOf which uses java.lang.instrument says 24 bytes. (3 longs?)
   public static final int ESTIMATED_HEAP_TAX = 16;
 
-  
+  private static final boolean UNSAFE_UNALIGNED = UnsafeAvailChecker.unaligned();
+
   /**
    * Returns length of the byte array, returning 0 if the array is null.
    * Useful for calculating sizes.
@@ -604,7 +602,7 @@ public class Bytes {
     if (length != SIZEOF_LONG || offset + length > bytes.length) {
       throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_LONG);
     }
-    if (UnsafeComparer.unaligned()) {
+    if (UNSAFE_UNALIGNED) {
       return toLongUnsafe(bytes, offset);
     } else {
       long l = 0;
@@ -645,7 +643,7 @@ public class Bytes {
       throw new IllegalArgumentException("Not enough room to put a long at"
           + " offset " + offset + " in a " + bytes.length + " byte array");
     }
-    if (UnsafeComparer.unaligned()) {
+    if (UNSAFE_UNALIGNED) {
       return putLongUnsafe(bytes, offset, val);
     } else {
       for(int i = offset + 7; i > offset; i--) {
@@ -800,7 +798,7 @@ public class Bytes {
     if (length != SIZEOF_INT || offset + length > bytes.length) {
       throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_INT);
     }
-    if (UnsafeComparer.unaligned()) {
+    if (UNSAFE_UNALIGNED) {
       return toIntUnsafe(bytes, offset);
     } else {
       int n = 0;
@@ -896,7 +894,7 @@ public class Bytes {
       throw new IllegalArgumentException("Not enough room to put an int at"
           + " offset " + offset + " in a " + bytes.length + " byte array");
     }
-    if (UnsafeComparer.unaligned()) {
+    if (UNSAFE_UNALIGNED) {
       return putIntUnsafe(bytes, offset, val);
     } else {
       for(int i= offset + 3; i > offset; i--) {
@@ -970,7 +968,7 @@ public class Bytes {
     if (length != SIZEOF_SHORT || offset + length > bytes.length) {
       throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_SHORT);
     }
-    if (UnsafeComparer.unaligned()) {
+    if (UNSAFE_UNALIGNED) {
       return toShortUnsafe(bytes, offset);
     } else {
       short n = 0;
@@ -1008,7 +1006,7 @@ public class Bytes {
       throw new IllegalArgumentException("Not enough room to put a short at"
           + " offset " + offset + " in a " + bytes.length + " byte array");
     }
-    if (UnsafeComparer.unaligned()) {
+    if (UNSAFE_UNALIGNED) {
       return putShortUnsafe(bytes, offset, val);
     } else {
       bytes[offset+1] = (byte) val;
@@ -1315,13 +1313,12 @@ public class Bytes {
       INSTANCE;
 
       static final Unsafe theUnsafe;
-      private static boolean unaligned = false;
 
       /** The offset to the first element in a byte array. */
       static final int BYTE_ARRAY_BASE_OFFSET;
 
       static {
-        if (UnsafeAccess.unaligned()) {
+        if (UNSAFE_UNALIGNED) {
           theUnsafe = UnsafeAccess.theUnsafe;
         } else {
           // It doesn't matter what we throw;
@@ -1335,7 +1332,6 @@ public class Bytes {
         if (theUnsafe.arrayIndexScale(byte[].class) != 1) {
           throw new AssertionError();
         }
-        unaligned = UnsafeAccess.unaligned();
       }
 
       static final boolean littleEndian =
@@ -1395,14 +1391,6 @@ public class Bytes {
         return theUnsafe != null;
       }
 
-      /**
-       * @return true when running JVM is having sun's Unsafe package available in it and underlying
-       *         system having unaligned-access capability.
-       */
-      public static boolean unaligned() {
-        return unaligned;
-      }
-
       /**
        * Lexicographically compare two arrays.
        *

hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java

@@ -18,9 +18,7 @@
 package org.apache.hadoop.hbase.util;
 
 import java.lang.reflect.Field;
-import java.lang.reflect.Method;
 import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 
@@ -41,7 +39,6 @@ public final class UnsafeAccess {
   private static final Log LOG = LogFactory.getLog(UnsafeAccess.class);
 
   public static final Unsafe theUnsafe;
-  private static boolean unaligned = false;
 
   /** The offset to the first element in a byte array. */
   public static final int BYTE_ARRAY_BASE_OFFSET;
@@ -67,34 +64,12 @@ public final class UnsafeAccess {
 
     if(theUnsafe != null){
       BYTE_ARRAY_BASE_OFFSET = theUnsafe.arrayBaseOffset(byte[].class);
-      try {
-        // Using java.nio.Bits#unaligned() to check for unaligned-access capability
-        Class<?> clazz = Class.forName("java.nio.Bits");
-        Method m = clazz.getDeclaredMethod("unaligned");
-        m.setAccessible(true);
-        unaligned = (boolean) m.invoke(null);
-      } catch (Exception e) {
-        unaligned = false; // FindBugs: Causes REC_CATCH_EXCEPTION. Suppressed.
-      }
     } else{
       BYTE_ARRAY_BASE_OFFSET = -1;
     }
   }
 
   private UnsafeAccess(){}
-  
-  public static boolean isAvailable() {
-    return theUnsafe != null;
-  }
-
-  /**
-   * @return true when running JVM is having sun's Unsafe package available in it and underlying
-   *         system having unaligned-access capability.
-   */
-  public static boolean unaligned() {
-    return unaligned;
-  }
-
 
   // APIs to copy data. This will be direct memory location copy and will be much faster
   /**

hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAvailChecker.java

@@ -0,0 +1,86 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.util;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hbase.classification.InterfaceAudience;
+
+@InterfaceAudience.Private
+public class UnsafeAvailChecker {
+
+  private static final String CLASS_NAME = "sun.misc.Unsafe";
+  private static final Log LOG = LogFactory.getLog(UnsafeAvailChecker.class);
+  private static boolean avail = false;
+  private static boolean unaligned = false;
+
+  static {
+    avail = AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
+      @Override
+      public Boolean run() {
+        try {
+          Class<?> clazz = Class.forName(CLASS_NAME);
+          Field f = clazz.getDeclaredField("theUnsafe");
+          f.setAccessible(true);
+          return f.get(null) != null;
+        } catch (Throwable e) {
+          LOG.warn("sun.misc.Unsafe is not available/accessible", e);
+        }
+        return false;
+      }
+    });
+    // When Unsafe itself is not available/accessible consider unaligned as false.
+    if (avail) {
+      try {
+        // Using java.nio.Bits#unaligned() to check for unaligned-access capability
+        Class<?> clazz = Class.forName("java.nio.Bits");
+        Method m = clazz.getDeclaredMethod("unaligned");
+        m.setAccessible(true);
+        unaligned = (boolean) m.invoke(null);
+      } catch (Exception e) {
+        LOG.warn("java.nio.Bits#unaligned() check failed."
+            + "Unsafe based read/write of primitive types won't be used", e);
+      }
+    }
+  }
+
+  /**
+   * @return true when running JVM is having sun's Unsafe package available in it and it is
+   *         accessible.
+   */
+  public static boolean isAvailable() {
+    return avail;
+  }
+
+  /**
+   * @return true when running JVM is having sun's Unsafe package available in it and underlying
+   *         system having unaligned-access capability.
+   */
+  public static boolean unaligned() {
+    return unaligned;
+  }
+
+  private UnsafeAvailChecker() {
+    // private constructor to avoid instantiation
+  }
+}