diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index fb699bc8bd5..40b5cd0894b 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -450,6 +450,9 @@ Release 2.8.0 - UNRELEASED
 
   BUG FIXES
 
+    HADOOP-10027. *Compressor_deflateBytesDirect passes instance instead of
+    jclass to GetStaticObjectField. (Hui Zheng via cnauroth)
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.java
index 0f333bb36ce..a973dc93340 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.java
@@ -44,9 +44,6 @@ public class Bzip2Compressor implements Compressor {
 
   private static final Log LOG = LogFactory.getLog(Bzip2Compressor.class);
 
-  // HACK - Use this as a global lock in the JNI layer.
-  private static Class<Bzip2Compressor> clazz = Bzip2Compressor.class;
-
   private long stream;
   private int blockSize;
   private int workFactor;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.java
index 672090209db..3135165e879 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.java
@@ -38,9 +38,6 @@ public class Bzip2Decompressor implements Decompressor {
   
   private static final Log LOG = LogFactory.getLog(Bzip2Decompressor.class);
 
-  // HACK - Use this as a global lock in the JNI layer.
-  private static Class<Bzip2Decompressor> clazz = Bzip2Decompressor.class;
-  
   private long stream;
   private boolean conserveMemory;
   private int directBufferSize;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Compressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Compressor.java
index b5db99f92dc..ccfae8b3c36 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Compressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Compressor.java
@@ -37,10 +37,6 @@ public class Lz4Compressor implements Compressor {
       LogFactory.getLog(Lz4Compressor.class.getName());
   private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64 * 1024;
 
-  // HACK - Use this as a global lock in the JNI layer
-  @SuppressWarnings({"unchecked", "unused"})
-  private static Class clazz = Lz4Compressor.class;
-
   private int directBufferSize;
   private Buffer compressedDirectBuf = null;
   private int uncompressedDirectBufLen;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.java
index 22a3118f5f9..685956cc1bf 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.java
@@ -36,10 +36,6 @@ public class Lz4Decompressor implements Decompressor {
       LogFactory.getLog(Lz4Compressor.class.getName());
   private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64 * 1024;
 
-  // HACK - Use this as a global lock in the JNI layer
-  @SuppressWarnings({"unchecked", "unused"})
-  private static Class clazz = Lz4Decompressor.class;
-
   private int directBufferSize;
   private Buffer compressedDirectBuf = null;
   private int compressedDirectBufLen;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyCompressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyCompressor.java
index ab45f250585..814718d99ef 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyCompressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyCompressor.java
@@ -37,10 +37,6 @@ public class SnappyCompressor implements Compressor {
       LogFactory.getLog(SnappyCompressor.class.getName());
   private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64 * 1024;
 
-  // HACK - Use this as a global lock in the JNI layer
-  @SuppressWarnings({"unchecked", "unused"})
-  private static Class clazz = SnappyCompressor.class;
-
   private int directBufferSize;
   private Buffer compressedDirectBuf = null;
   private int uncompressedDirectBufLen;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.java
index b5f5acf8664..dbffba811b1 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.java
@@ -37,10 +37,6 @@ public class SnappyDecompressor implements Decompressor {
       LogFactory.getLog(SnappyCompressor.class.getName());
   private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64 * 1024;
 
-  // HACK - Use this as a global lock in the JNI layer
-  @SuppressWarnings({"unchecked", "unused"})
-  private static Class clazz = SnappyDecompressor.class;
-
   private int directBufferSize;
   private Buffer compressedDirectBuf = null;
   private int compressedDirectBufLen;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibCompressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibCompressor.java
index 6799403b160..b9550449f7f 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibCompressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibCompressor.java
@@ -41,9 +41,6 @@ public class ZlibCompressor implements Compressor {
 
   private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64*1024;
 
-  // HACK - Use this as a global lock in the JNI layer
-  private static Class clazz = ZlibCompressor.class;
-
   private long stream;
   private CompressionLevel level;
   private CompressionStrategy strategy;
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.java
index 89c879a03c8..d728fad817b 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.java
@@ -34,10 +34,7 @@ import org.apache.hadoop.util.NativeCodeLoader;
  */
 public class ZlibDecompressor implements Decompressor {
   private static final int DEFAULT_DIRECT_BUFFER_SIZE = 64*1024;
-  
-  // HACK - Use this as a global lock in the JNI layer
-  private static Class clazz = ZlibDecompressor.class;
-  
+
   private long stream;
   private CompressionHeader header;
   private int directBufferSize;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.c
index ef81bea2ce0..a92123efcd9 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Compressor.c
@@ -25,7 +25,6 @@
 #include "org_apache_hadoop_io_compress_bzip2.h"
 #include "org_apache_hadoop_io_compress_bzip2_Bzip2Compressor.h"
 
-static jfieldID Bzip2Compressor_clazz;
 static jfieldID Bzip2Compressor_stream;
 static jfieldID Bzip2Compressor_uncompressedDirectBuf;
 static jfieldID Bzip2Compressor_uncompressedDirectBufOff;
@@ -74,8 +73,6 @@ Java_org_apache_hadoop_io_compress_bzip2_Bzip2Compressor_initIDs(
                         "BZ2_bzCompressEnd");
 
     // Initialize the requisite fieldIds.
-    Bzip2Compressor_clazz = (*env)->GetStaticFieldID(env, class, "clazz", 
-                                                     "Ljava/lang/Class;");
     Bzip2Compressor_stream = (*env)->GetFieldID(env, class, "stream", "J");
     Bzip2Compressor_finish = (*env)->GetFieldID(env, class, "finish", "Z");
     Bzip2Compressor_finished = (*env)->GetFieldID(env, class, "finished", "Z");
@@ -155,9 +152,7 @@ Java_org_apache_hadoop_io_compress_bzip2_Bzip2Compressor_deflateBytesDirect(
         return (jint)0;
     } 
 
-    jobject clazz = (*env)->GetStaticObjectField(env, this, 
-                                                 Bzip2Compressor_clazz);
-    jobject uncompressed_direct_buf = (*env)->GetObjectField(env, this, 
+    jobject uncompressed_direct_buf = (*env)->GetObjectField(env, this,
                                      Bzip2Compressor_uncompressedDirectBuf);
     jint uncompressed_direct_buf_off = (*env)->GetIntField(env, this, 
                                    Bzip2Compressor_uncompressedDirectBufOff);
@@ -173,12 +168,10 @@ Java_org_apache_hadoop_io_compress_bzip2_Bzip2Compressor_deflateBytesDirect(
                                               Bzip2Compressor_finish);
 
     // Get the input and output direct buffers.
-    LOCK_CLASS(env, clazz, "Bzip2Compressor");
     char* uncompressed_bytes = (*env)->GetDirectBufferAddress(env, 
                                                 uncompressed_direct_buf);
     char* compressed_bytes = (*env)->GetDirectBufferAddress(env, 
                                                 compressed_direct_buf);
-    UNLOCK_CLASS(env, clazz, "Bzip2Compressor");
 
     if (!uncompressed_bytes || !compressed_bytes) {
         return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.c
index ad9bcb72c6c..3d9fc084f78 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/bzip2/Bzip2Decompressor.c
@@ -25,7 +25,6 @@
 #include "org_apache_hadoop_io_compress_bzip2.h"
 #include "org_apache_hadoop_io_compress_bzip2_Bzip2Decompressor.h"
 
-static jfieldID Bzip2Decompressor_clazz;
 static jfieldID Bzip2Decompressor_stream;
 static jfieldID Bzip2Decompressor_compressedDirectBuf;
 static jfieldID Bzip2Decompressor_compressedDirectBufOff;
@@ -73,8 +72,6 @@ Java_org_apache_hadoop_io_compress_bzip2_Bzip2Decompressor_initIDs(
                         "BZ2_bzDecompressEnd");
 
     // Initialize the requisite fieldIds.
-    Bzip2Decompressor_clazz = (*env)->GetStaticFieldID(env, class, "clazz", 
-                                                       "Ljava/lang/Class;");
     Bzip2Decompressor_stream = (*env)->GetFieldID(env, class, "stream", "J");
     Bzip2Decompressor_finished = (*env)->GetFieldID(env, class,
                                                     "finished", "Z");
@@ -144,8 +141,6 @@ Java_org_apache_hadoop_io_compress_bzip2_Bzip2Decompressor_inflateBytesDirect(
         return (jint)0;
     } 
 
-    jobject clazz = (*env)->GetStaticObjectField(env, this, 
-                                                 Bzip2Decompressor_clazz);
     jarray compressed_direct_buf = (jarray)(*env)->GetObjectField(env,
                                 this, Bzip2Decompressor_compressedDirectBuf);
     jint compressed_direct_buf_off = (*env)->GetIntField(env, this, 
@@ -159,12 +154,10 @@ Java_org_apache_hadoop_io_compress_bzip2_Bzip2Decompressor_inflateBytesDirect(
                                 Bzip2Decompressor_directBufferSize);
 
     // Get the input and output direct buffers.
-    LOCK_CLASS(env, clazz, "Bzip2Decompressor");
     char* compressed_bytes = (*env)->GetDirectBufferAddress(env, 
                                                 compressed_direct_buf);
     char* uncompressed_bytes = (*env)->GetDirectBufferAddress(env, 
                                                 uncompressed_direct_buf);
-    UNLOCK_CLASS(env, clazz, "Bzip2Decompressor");
 
     if (!compressed_bytes || !uncompressed_bytes) {
         return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Compressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Compressor.c
index 9f14312cde3..f742384efc7 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Compressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Compressor.c
@@ -27,7 +27,6 @@
 #include "lz4hc.h"
 
 
-static jfieldID Lz4Compressor_clazz;
 static jfieldID Lz4Compressor_uncompressedDirectBuf;
 static jfieldID Lz4Compressor_uncompressedDirectBufLen;
 static jfieldID Lz4Compressor_compressedDirectBuf;
@@ -37,8 +36,6 @@ static jfieldID Lz4Compressor_directBufferSize;
 JNIEXPORT void JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_initIDs
 (JNIEnv *env, jclass clazz){
 
-  Lz4Compressor_clazz = (*env)->GetStaticFieldID(env, clazz, "clazz",
-                                                 "Ljava/lang/Class;");
   Lz4Compressor_uncompressedDirectBuf = (*env)->GetFieldID(env, clazz,
                                                            "uncompressedDirectBuf",
                                                            "Ljava/nio/Buffer;");
@@ -57,25 +54,20 @@ JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_comp
   char *compressed_bytes;
 
   // Get members of Lz4Compressor
-  jobject clazz = (*env)->GetStaticObjectField(env, thisj, Lz4Compressor_clazz);
   jobject uncompressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_uncompressedDirectBuf);
   jint uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_uncompressedDirectBufLen);
   jobject compressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_compressedDirectBuf);
   jint compressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_directBufferSize);
 
   // Get the input direct buffer
-  LOCK_CLASS(env, clazz, "Lz4Compressor");
   uncompressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "Lz4Compressor");
 
   if (uncompressed_bytes == 0) {
     return (jint)0;
   }
 
   // Get the output direct buffer
-  LOCK_CLASS(env, clazz, "Lz4Compressor");
   compressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "Lz4Compressor");
 
   if (compressed_bytes == 0) {
     return (jint)0;
@@ -104,25 +96,20 @@ JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_comp
   char* compressed_bytes = NULL;
 
   // Get members of Lz4Compressor
-  jobject clazz = (*env)->GetStaticObjectField(env, thisj, Lz4Compressor_clazz);
   jobject uncompressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_uncompressedDirectBuf);
   jint uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_uncompressedDirectBufLen);
   jobject compressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_compressedDirectBuf);
   jint compressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_directBufferSize);
 
   // Get the input direct buffer
-  LOCK_CLASS(env, clazz, "Lz4Compressor");
   uncompressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "Lz4Compressor");
 
   if (uncompressed_bytes == 0) {
     return (jint)0;
   }
 
   // Get the output direct buffer
-  LOCK_CLASS(env, clazz, "Lz4Compressor");
   compressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "Lz4Compressor");
 
   if (compressed_bytes == 0) {
     return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.c
index 2b8c91c348b..cdeaa315d1e 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/Lz4Decompressor.c
@@ -25,7 +25,6 @@
 #include "lz4.h"
 
 
-static jfieldID Lz4Decompressor_clazz;
 static jfieldID Lz4Decompressor_compressedDirectBuf;
 static jfieldID Lz4Decompressor_compressedDirectBufLen;
 static jfieldID Lz4Decompressor_uncompressedDirectBuf;
@@ -34,8 +33,6 @@ static jfieldID Lz4Decompressor_directBufferSize;
 JNIEXPORT void JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Decompressor_initIDs
 (JNIEnv *env, jclass clazz){
 
-  Lz4Decompressor_clazz = (*env)->GetStaticFieldID(env, clazz, "clazz",
-                                                   "Ljava/lang/Class;");
   Lz4Decompressor_compressedDirectBuf = (*env)->GetFieldID(env,clazz,
                                                            "compressedDirectBuf",
                                                            "Ljava/nio/Buffer;");
@@ -54,25 +51,20 @@ JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Decompressor_de
   char *uncompressed_bytes;
 
   // Get members of Lz4Decompressor
-  jobject clazz = (*env)->GetStaticObjectField(env,thisj, Lz4Decompressor_clazz);
   jobject compressed_direct_buf = (*env)->GetObjectField(env,thisj, Lz4Decompressor_compressedDirectBuf);
   jint compressed_direct_buf_len = (*env)->GetIntField(env,thisj, Lz4Decompressor_compressedDirectBufLen);
   jobject uncompressed_direct_buf = (*env)->GetObjectField(env,thisj, Lz4Decompressor_uncompressedDirectBuf);
   size_t uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Decompressor_directBufferSize);
 
   // Get the input direct buffer
-  LOCK_CLASS(env, clazz, "Lz4Decompressor");
   compressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "Lz4Decompressor");
 
   if (compressed_bytes == 0) {
     return (jint)0;
   }
 
   // Get the output direct buffer
-  LOCK_CLASS(env, clazz, "Lz4Decompressor");
   uncompressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "Lz4Decompressor");
 
   if (uncompressed_bytes == 0) {
     return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyCompressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyCompressor.c
index fe827f02dea..9a09f078d82 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyCompressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyCompressor.c
@@ -38,7 +38,6 @@
 
 #define JINT_MAX 0x7fffffff
 
-static jfieldID SnappyCompressor_clazz;
 static jfieldID SnappyCompressor_uncompressedDirectBuf;
 static jfieldID SnappyCompressor_uncompressedDirectBufLen;
 static jfieldID SnappyCompressor_compressedDirectBuf;
@@ -84,8 +83,6 @@ JNIEXPORT void JNICALL Java_org_apache_hadoop_io_compress_snappy_SnappyCompresso
   LOAD_DYNAMIC_SYMBOL(__dlsym_snappy_compress, dlsym_snappy_compress, env, libsnappy, "snappy_compress");
 #endif
 
-  SnappyCompressor_clazz = (*env)->GetStaticFieldID(env, clazz, "clazz",
-                                                 "Ljava/lang/Class;");
   SnappyCompressor_uncompressedDirectBuf = (*env)->GetFieldID(env, clazz,
                                                            "uncompressedDirectBuf",
                                                            "Ljava/nio/Buffer;");
@@ -104,7 +101,6 @@ JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_snappy_SnappyCompresso
   char* compressed_bytes;
   snappy_status ret;
   // Get members of SnappyCompressor
-  jobject clazz = (*env)->GetStaticObjectField(env, thisj, SnappyCompressor_clazz);
   jobject uncompressed_direct_buf = (*env)->GetObjectField(env, thisj, SnappyCompressor_uncompressedDirectBuf);
   jint uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, SnappyCompressor_uncompressedDirectBufLen);
   jobject compressed_direct_buf = (*env)->GetObjectField(env, thisj, SnappyCompressor_compressedDirectBuf);
@@ -112,18 +108,14 @@ JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_snappy_SnappyCompresso
   size_t buf_len;
 
   // Get the input direct buffer
-  LOCK_CLASS(env, clazz, "SnappyCompressor");
   uncompressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "SnappyCompressor");
 
   if (uncompressed_bytes == 0) {
     return (jint)0;
   }
 
   // Get the output direct buffer
-  LOCK_CLASS(env, clazz, "SnappyCompressor");
   compressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "SnappyCompressor");
 
   if (compressed_bytes == 0) {
     return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.c
index d1fd13c9e54..69ec1017526 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/snappy/SnappyDecompressor.c
@@ -31,7 +31,6 @@
 
 #include "org_apache_hadoop_io_compress_snappy_SnappyDecompressor.h"
 
-static jfieldID SnappyDecompressor_clazz;
 static jfieldID SnappyDecompressor_compressedDirectBuf;
 static jfieldID SnappyDecompressor_compressedDirectBufLen;
 static jfieldID SnappyDecompressor_uncompressedDirectBuf;
@@ -79,8 +78,6 @@ JNIEXPORT void JNICALL Java_org_apache_hadoop_io_compress_snappy_SnappyDecompres
   LOAD_DYNAMIC_SYMBOL(__dlsym_snappy_uncompress, dlsym_snappy_uncompress, env, libsnappy, "snappy_uncompress");
 #endif
 
-  SnappyDecompressor_clazz = (*env)->GetStaticFieldID(env, clazz, "clazz",
-                                                   "Ljava/lang/Class;");
   SnappyDecompressor_compressedDirectBuf = (*env)->GetFieldID(env,clazz,
                                                            "compressedDirectBuf",
                                                            "Ljava/nio/Buffer;");
@@ -99,25 +96,20 @@ JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_snappy_SnappyDecompres
   char* uncompressed_bytes = NULL;
   snappy_status ret;
   // Get members of SnappyDecompressor
-  jobject clazz = (*env)->GetStaticObjectField(env,thisj, SnappyDecompressor_clazz);
   jobject compressed_direct_buf = (*env)->GetObjectField(env,thisj, SnappyDecompressor_compressedDirectBuf);
   jint compressed_direct_buf_len = (*env)->GetIntField(env,thisj, SnappyDecompressor_compressedDirectBufLen);
   jobject uncompressed_direct_buf = (*env)->GetObjectField(env,thisj, SnappyDecompressor_uncompressedDirectBuf);
   size_t uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, SnappyDecompressor_directBufferSize);
 
   // Get the input direct buffer
-  LOCK_CLASS(env, clazz, "SnappyDecompressor");
   compressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "SnappyDecompressor");
 
   if (compressed_bytes == 0) {
     return (jint)0;
   }
 
   // Get the output direct buffer
-  LOCK_CLASS(env, clazz, "SnappyDecompressor");
   uncompressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
-  UNLOCK_CLASS(env, clazz, "SnappyDecompressor");
 
   if (uncompressed_bytes == 0) {
     return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c
index f7c0cb9db99..51f7bed9bd7 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c
@@ -28,7 +28,6 @@
 #include "org_apache_hadoop_io_compress_zlib.h"
 #include "org_apache_hadoop_io_compress_zlib_ZlibCompressor.h"
 
-static jfieldID ZlibCompressor_clazz;
 static jfieldID ZlibCompressor_stream;
 static jfieldID ZlibCompressor_uncompressedDirectBuf;
 static jfieldID ZlibCompressor_uncompressedDirectBufOff;
@@ -141,8 +140,6 @@ Java_org_apache_hadoop_io_compress_zlib_ZlibCompressor_initIDs(
 #endif
 
 	// Initialize the requisite fieldIds
-    ZlibCompressor_clazz = (*env)->GetStaticFieldID(env, class, "clazz",
-                                                      "Ljava/lang/Class;");
     ZlibCompressor_stream = (*env)->GetFieldID(env, class, "stream", "J");
     ZlibCompressor_finish = (*env)->GetFieldID(env, class, "finish", "Z");
     ZlibCompressor_finished = (*env)->GetFieldID(env, class, "finished", "Z");
@@ -239,7 +236,6 @@ JNIEXPORT jint JNICALL
 Java_org_apache_hadoop_io_compress_zlib_ZlibCompressor_deflateBytesDirect(
 	JNIEnv *env, jobject this
 	) {
-    jobject clazz = NULL;
     jobject uncompressed_direct_buf = NULL;
     jint uncompressed_direct_buf_off = 0;
     jint uncompressed_direct_buf_len = 0;
@@ -260,9 +256,6 @@ Java_org_apache_hadoop_io_compress_zlib_ZlibCompressor_deflateBytesDirect(
 		return (jint)0;
     }
 
-    // Get members of ZlibCompressor
-    clazz = (*env)->GetStaticObjectField(env, this,
-                                                 ZlibCompressor_clazz);
 	uncompressed_direct_buf = (*env)->GetObjectField(env, this,
 									ZlibCompressor_uncompressedDirectBuf);
 	uncompressed_direct_buf_off = (*env)->GetIntField(env, this,
@@ -278,20 +271,16 @@ Java_org_apache_hadoop_io_compress_zlib_ZlibCompressor_deflateBytesDirect(
 	finish = (*env)->GetBooleanField(env, this, ZlibCompressor_finish);
 
     // Get the input direct buffer
-    LOCK_CLASS(env, clazz, "ZlibCompressor");
     uncompressed_bytes = (*env)->GetDirectBufferAddress(env,
 											uncompressed_direct_buf);
-    UNLOCK_CLASS(env, clazz, "ZlibCompressor");
 
   	if (uncompressed_bytes == 0) {
     	return (jint)0;
 	}
 
     // Get the output direct buffer
-    LOCK_CLASS(env, clazz, "ZlibCompressor");
     compressed_bytes = (*env)->GetDirectBufferAddress(env,
 										compressed_direct_buf);
-    UNLOCK_CLASS(env, clazz, "ZlibCompressor");
 
   	if (compressed_bytes == 0) {
 		return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.c b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.c
index 8b78f41e1a1..b9f23b181b0 100644
--- a/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.c
+++ b/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.c
@@ -28,7 +28,6 @@
 #include "org_apache_hadoop_io_compress_zlib.h"
 #include "org_apache_hadoop_io_compress_zlib_ZlibDecompressor.h"
 
-static jfieldID ZlibDecompressor_clazz;
 static jfieldID ZlibDecompressor_stream;
 static jfieldID ZlibDecompressor_compressedDirectBuf;
 static jfieldID ZlibDecompressor_compressedDirectBufOff;
@@ -104,8 +103,6 @@ JNIEnv *env, jclass class
 
 
   // Initialize the requisite fieldIds
-    ZlibDecompressor_clazz = (*env)->GetStaticFieldID(env, class, "clazz",
-                                                      "Ljava/lang/Class;");
     ZlibDecompressor_stream = (*env)->GetFieldID(env, class, "stream", "J");
     ZlibDecompressor_needDict = (*env)->GetFieldID(env, class, "needDict", "Z");
     ZlibDecompressor_finished = (*env)->GetFieldID(env, class, "finished", "Z");
@@ -197,7 +194,6 @@ JNIEXPORT jint JNICALL
 Java_org_apache_hadoop_io_compress_zlib_ZlibDecompressor_inflateBytesDirect(
 	JNIEnv *env, jobject this
 	) {
-    jobject clazz = NULL;
     jarray compressed_direct_buf = NULL;
     jint compressed_direct_buf_off = 0;
     jint compressed_direct_buf_len = 0;
@@ -218,8 +214,6 @@ Java_org_apache_hadoop_io_compress_zlib_ZlibDecompressor_inflateBytesDirect(
     }
 
     // Get members of ZlibDecompressor
-    clazz = (*env)->GetStaticObjectField(env, this,
-                                                 ZlibDecompressor_clazz);
 	compressed_direct_buf = (jarray)(*env)->GetObjectField(env, this,
 											ZlibDecompressor_compressedDirectBuf);
 	compressed_direct_buf_off = (*env)->GetIntField(env, this,
@@ -233,20 +227,16 @@ Java_org_apache_hadoop_io_compress_zlib_ZlibDecompressor_inflateBytesDirect(
 										ZlibDecompressor_directBufferSize);
 
     // Get the input direct buffer
-    LOCK_CLASS(env, clazz, "ZlibDecompressor");
 	compressed_bytes = (*env)->GetDirectBufferAddress(env,
 										compressed_direct_buf);
-    UNLOCK_CLASS(env, clazz, "ZlibDecompressor");
 
 	if (!compressed_bytes) {
 	    return (jint)0;
 	}
 
     // Get the output direct buffer
-    LOCK_CLASS(env, clazz, "ZlibDecompressor");
 	uncompressed_bytes = (*env)->GetDirectBufferAddress(env,
 											uncompressed_direct_buf);
-    UNLOCK_CLASS(env, clazz, "ZlibDecompressor");
 
 	if (!uncompressed_bytes) {
 	    return (jint)0;
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/bzip2/TestBzip2CompressorDecompressor.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/bzip2/TestBzip2CompressorDecompressor.java
new file mode 100644
index 00000000000..c585a463e46
--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/bzip2/TestBzip2CompressorDecompressor.java
@@ -0,0 +1,104 @@
+/**
+ * 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.io.compress.bzip2;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.DataInputBuffer;
+import org.apache.hadoop.io.DataOutputBuffer;
+import org.apache.hadoop.io.compress.*;
+import org.apache.hadoop.io.compress.bzip2.Bzip2Compressor;
+import org.apache.hadoop.io.compress.bzip2.Bzip2Decompressor;
+import org.apache.hadoop.test.MultithreadedTestUtil;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.*;
+import java.util.Random;
+
+import static org.junit.Assert.*;
+import static org.junit.Assume.*;
+import static org.junit.Assume.assumeTrue;
+
+public class TestBzip2CompressorDecompressor {
+  
+  private static final Random rnd = new Random(12345l);
+
+  @Before
+  public void before() {
+    assumeTrue(Bzip2Factory.isNativeBzip2Loaded(new Configuration()));
+  }
+
+  // test compress/decompress process 
+  @Test
+  public void testCompressDecompress() {
+    byte[] rawData = null;
+    int rawDataSize = 0;
+    rawDataSize = 1024 * 64;
+    rawData = generate(rawDataSize);
+    try {
+      Bzip2Compressor compressor = new Bzip2Compressor();
+      Bzip2Decompressor decompressor = new Bzip2Decompressor();
+      assertFalse("testBzip2CompressDecompress finished error",
+          compressor.finished());
+      compressor.setInput(rawData, 0, rawData.length);
+      assertTrue("testBzip2CompressDecompress getBytesRead before error",
+          compressor.getBytesRead() == 0);
+      compressor.finish();
+
+      byte[] compressedResult = new byte[rawDataSize];
+      int cSize = compressor.compress(compressedResult, 0, rawDataSize);
+      assertTrue("testBzip2CompressDecompress getBytesRead after error",
+          compressor.getBytesRead() == rawDataSize);
+      assertTrue(
+          "testBzip2CompressDecompress compressed size no less than original size",
+          cSize < rawDataSize);
+      decompressor.setInput(compressedResult, 0, cSize);
+      byte[] decompressedBytes = new byte[rawDataSize];
+      decompressor.decompress(decompressedBytes, 0, decompressedBytes.length);
+      assertArrayEquals("testBzip2CompressDecompress arrays not equals ",
+          rawData, decompressedBytes);
+      compressor.reset();
+      decompressor.reset();
+    } catch (IOException ex) {
+      fail("testBzip2CompressDecompress ex !!!" + ex);
+    }
+  }
+
+  public static byte[] generate(int size) {
+    byte[] array = new byte[size];
+    for (int i = 0; i < size; i++)
+      array[i] = (byte)rnd.nextInt(16);
+    return array;
+  }
+
+  @Test
+  public void testBzip2CompressDecompressInMultiThreads() throws Exception {
+    MultithreadedTestUtil.TestContext ctx = new MultithreadedTestUtil.TestContext();
+    for(int i=0;i<10;i++) {
+      ctx.addThread( new MultithreadedTestUtil.TestingThread(ctx) {
+        @Override
+        public void doWork() throws Exception {
+          testCompressDecompress();
+        }
+      });
+    }
+    ctx.startThreads();
+
+    ctx.waitFor(60000);
+  }
+}
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/lz4/TestLz4CompressorDecompressor.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/lz4/TestLz4CompressorDecompressor.java
index e8555b23887..6f3b076097a 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/lz4/TestLz4CompressorDecompressor.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/lz4/TestLz4CompressorDecompressor.java
@@ -36,6 +36,7 @@ import org.apache.hadoop.io.compress.CompressionOutputStream;
 import org.apache.hadoop.io.compress.Lz4Codec;
 import org.apache.hadoop.io.compress.lz4.Lz4Compressor;
 import org.apache.hadoop.io.compress.lz4.Lz4Decompressor;
+import org.apache.hadoop.test.MultithreadedTestUtil;
 import org.junit.Before;
 import org.junit.Test;
 import static org.junit.Assume.*;
@@ -313,4 +314,20 @@ public class TestLz4CompressorDecompressor {
       array[i] = (byte)rnd.nextInt(16);
     return array;
   }
+
+  @Test
+  public void testLz4CompressDecompressInMultiThreads() throws Exception {
+    MultithreadedTestUtil.TestContext ctx = new MultithreadedTestUtil.TestContext();
+    for(int i=0;i<10;i++) {
+      ctx.addThread( new MultithreadedTestUtil.TestingThread(ctx) {
+        @Override
+        public void doWork() throws Exception {
+          testCompressDecompress();
+        }
+      });
+    }
+    ctx.startThreads();
+
+    ctx.waitFor(60000);
+  }
 }
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/snappy/TestSnappyCompressorDecompressor.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/snappy/TestSnappyCompressorDecompressor.java
index 77fbcc099ac..cc986c7e0ae 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/snappy/TestSnappyCompressorDecompressor.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/snappy/TestSnappyCompressorDecompressor.java
@@ -40,6 +40,7 @@ import org.apache.hadoop.io.compress.CompressionInputStream;
 import org.apache.hadoop.io.compress.CompressionOutputStream;
 import org.apache.hadoop.io.compress.SnappyCodec;
 import org.apache.hadoop.io.compress.snappy.SnappyDecompressor.SnappyDirectDecompressor;
+import org.apache.hadoop.test.MultithreadedTestUtil;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
@@ -391,4 +392,20 @@ public class TestSnappyCompressorDecompressor {
       return array;
     }
   }
+
+  @Test
+  public void testSnappyCompressDecompressInMultiThreads() throws Exception {
+    MultithreadedTestUtil.TestContext ctx = new MultithreadedTestUtil.TestContext();
+    for(int i=0;i<10;i++) {
+      ctx.addThread( new MultithreadedTestUtil.TestingThread(ctx) {
+        @Override
+        public void doWork() throws Exception {
+          testSnappyCompressDecompress();
+        }
+      });
+    }
+    ctx.startThreads();
+
+    ctx.waitFor(60000);
+  }
 }
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zlib/TestZlibCompressorDecompressor.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zlib/TestZlibCompressorDecompressor.java
index db5784c07aa..e7511251b64 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zlib/TestZlibCompressorDecompressor.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zlib/TestZlibCompressorDecompressor.java
@@ -38,6 +38,7 @@ import org.apache.hadoop.io.compress.CompressDecompressTester.CompressionTestStr
 import org.apache.hadoop.io.compress.zlib.ZlibCompressor.CompressionLevel;
 import org.apache.hadoop.io.compress.zlib.ZlibCompressor.CompressionStrategy;
 import org.apache.hadoop.io.compress.zlib.ZlibDecompressor.ZlibDirectDecompressor;
+import org.apache.hadoop.test.MultithreadedTestUtil;
 import org.apache.hadoop.util.NativeCodeLoader;
 import org.junit.Before;
 import org.junit.Test;
@@ -419,4 +420,20 @@ public class TestZlibCompressorDecompressor {
       data[i] = (byte)random.nextInt(16);
     return data;
   }
+
+  @Test
+  public void testZlibCompressDecompressInMultiThreads() throws Exception {
+    MultithreadedTestUtil.TestContext ctx = new MultithreadedTestUtil.TestContext();
+    for(int i=0;i<10;i++) {
+      ctx.addThread( new MultithreadedTestUtil.TestingThread(ctx) {
+        @Override
+        public void doWork() throws Exception {
+          testZlibCompressDecompress();
+        }
+      });
+    }
+    ctx.startThreads();
+
+    ctx.waitFor(60000);
+  }
 }