luyuncheng commented on code in PR #987:
URL: https://github.com/apache/lucene/pull/987#discussion_r923100057


##########
lucene/core/src/java/org/apache/lucene/codecs/lucene90/DeflateWithPresetDictCompressionMode.java:
##########
@@ -163,12 +165,16 @@ private static class DeflateWithPresetDictCompressor 
extends Compressor {
     final Deflater compressor;
     final BugfixDeflater_JDK8252739 deflaterBugfix;
     byte[] compressed;
+    byte[] bufferDict;
+    byte[] bufferBlock;
     boolean closed;
 
     DeflateWithPresetDictCompressor(int level) {
       compressor = new Deflater(level, true);
       deflaterBugfix = BugfixDeflater_JDK8252739.createBugfix(compressor);
       compressed = new byte[64];
+      bufferDict = BytesRef.EMPTY_BYTES;
+      bufferBlock = BytesRef.EMPTY_BYTES;
     }
 
     private void doCompress(byte[] bytes, int off, int len, DataOutput out) 
throws IOException {

Review Comment:
   ++ ,at 
[commits(ebcbd)](https://github.com/apache/lucene/blob/ebcbdd05fbf114ca15d04cd4a9172eb51fab9a1a/lucene/core/src/java/org/apache/lucene/codecs/lucene90/DeflateWithPresetDictCompressionMode.java)
 i removed it



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