Index: lucene/src/java/org/apache/lucene/store/IndexInput.java
===================================================================
--- lucene/src/java/org/apache/lucene/store/IndexInput.java	(revision 1190356)
+++ lucene/src/java/org/apache/lucene/store/IndexInput.java	(working copy)
@@ -26,8 +26,6 @@
  */
 public abstract class IndexInput extends DataInput implements Cloneable,Closeable {
 
-  protected byte[] copyBuf = null;
-
   /** Closes the stream to further operations. */
   public abstract void close() throws IOException;
 
@@ -59,9 +57,7 @@
   public void copyBytes(IndexOutput out, long numBytes) throws IOException {
     assert numBytes >= 0: "numBytes=" + numBytes;
 
-    if (copyBuf == null) {
-      copyBuf = new byte[BufferedIndexInput.BUFFER_SIZE];
-    }
+    byte copyBuf[] = new byte[BufferedIndexInput.BUFFER_SIZE];
 
     while (numBytes > 0) {
       final int toCopy = (int) (numBytes > copyBuf.length ? copyBuf.length : numBytes);