Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/10342#discussion_r47975340
--- Diff: core/src/main/scala/org/apache/spark/io/LZ4BlockInputStream.java
---
@@ -0,0 +1,259 @@
+package org.apache.spark.io;
+
+/*
+ * Licensed 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.
+ */
+
+import java.io.EOFException;
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.Checksum;
+
+import net.jpountz.lz4.LZ4BlockOutputStream;
+import net.jpountz.lz4.LZ4Exception;
+import net.jpountz.lz4.LZ4Factory;
+import net.jpountz.lz4.LZ4FastDecompressor;
+import net.jpountz.util.SafeUtils;
+import net.jpountz.xxhash.StreamingXXHash32;
+import net.jpountz.xxhash.XXHash32;
+import net.jpountz.xxhash.XXHashFactory;
+
+/**
+ * {@link InputStream} implementation to decode data written with
+ * {@link LZ4BlockOutputStream}. This class is not thread-safe and does not
+ * support {@link #mark(int)}/{@link #reset()}.
+ * @see LZ4BlockOutputStream
+ *
+ * This is based on net.jpountz.lz4.LZ4BlockInputStream
--- End diff --
See the changes here:
https://github.com/davies/lz4-java/commit/cc1fa940ac57cc66a0b937300f805d37e2bf8411
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