[HBASE-21937] Make the Compression#decompress can accept ByteBuff as input

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Hadoop Flags: Reviewed
• Assignee: Zheng Hu
• Reporter: Zheng Hu
• Created: 20/Feb/19 04:11
• Updated: 01/Jul/22 21:44
• Resolved: 25/Apr/19 07:19

Description

When decompressing an compressed block, we are also allocating HeapByteBuffer for the unpacked block. should allocate ByteBuff from the global ByteBuffAllocator, skimmed the code, the key point is, we need an ByteBuff decompress interface, not the following:

# Compression.java
  public static void decompress(byte[] dest, int destOffset,
      InputStream bufferedBoundedStream, int compressedSize,
      int uncompressedSize, Compression.Algorithm compressAlgo)
      throws IOException {
      //...
}

Not very high priority, let me make the block without compression to be offheap firstly.

In HBASE-22005, I ignored the unit test:
1. TestLoadAndSwitchEncodeOnDisk ;
2. TestHFileBlock#testPreviousOffset;

Need to resolve this issue and make those UT works fine.

Issue Links

• links to: Review board